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Location:
Sydney
Registered:
May 2002
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1jz Single turbs Conversion
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Wed, 02 October 2002 22:12
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Heya all,
Just wondering,
If you were getting a Single Turbs manifold made for the 1j,
What turbo would you use?
bear in mind that the turbo has to be a fairly generic item. Also if you can tell me why you would choose that particular item it would be good.
Thanks,
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Location:
U.S.A
Registered:
July 2002
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Wed, 02 October 2002 23:35
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You know the 1JZ came with a single turbo in later models right? Why not use their exhaust manifold?
Michael
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Location:
Brisbane
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 00:09
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Where are you going to get one from? I've spoken to a few importers and they've never even seen a single-turbo 1JZ, let alone sold one. These are still pretty late-model engines so getting your hands on one won't be easy (or cheap). 
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 00:12
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Try getting one from Toyota. I'd imagine Penrith Toyota could get one.
Michael
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Registered:
June 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 00:25
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When you see a single turbo 1JZ manifold you'll know why NOT to use one. A manifold off a 3k is nicer!!
Trust do one, but it's like $3500. Real nice though.
If a single conversion is being done on the cheap then go for a CT26 off a 7M, you could even get some work done on it.
Get a Mitsi T67 made up with a Garret comp wheel or a 25g.
Or go out and spend a couple of grand on a nice GT3040.
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Location:
Wollongong
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 01:03
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I'd go a single GT3240 rollerbearing turbo or a Trust T78-33D.
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Location:
Newcastle, NSW, Australia
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 01:13
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And that's not the end of it of course. If your doing it for power (as I assume one would) you'll also need an upgraded fuel system, aftermarket computer and stronger clutch (or rebuilt auto). Expect to shell out between $8,000 and $10,000.
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Location:
Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 01:28
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Right.. well the plan is...
Im going to get some turbo manifolds made up for various cars.
I was thinking there would be a big interest in the 1jz.
As the standard two turbos are pretty poor if your chasing power.. as for the 8-10k estimate, I feel thats a bit rich.
The reason i started this thread is to get an idea as to what flange to get on the end?
Everyone wants something different.
I think the ct26 is a go.. they are cheep turbos and once high flowed with a decent turbine they can produce good power.
Im not talking about a 1j with 1000kw here.. but enough to make it alot of an improvement over the standard twins.
If anyone would be interest please let me know..
also let me know if you think a ct26 flange would suit..
Otherwise everyone will be in dream land telling me t88's..
Im really only interested in constructive critism from people who OWN a 1jz twin and want to go the single route..
Unless you all wanna get chomped again at dyno day buy a 7m 
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 01:44
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Corvid,
I like where your coming from. I have a 1JZ TT Soarer and happen to have a spare CT-26 that needs a little work.
I understand the 1JZ turbo's (CT-12a's?) have a limited life if running a 12-15psi. Thinking of the future and what would be economical as a replacement. 2 replacements bing too expensive and cast iron turbines hampering low rev response. The CT-26 therefore sounds worth considering.
But, my limited inderstanding of the CT-26 was that the compressor whell could be upgraded, but not the turbine, due to the method of construction. The earlier thread seemed to indicate otherwise.
Obviously im interested because I already have a spare CT-26, but they are pretty cheap anyway. But a compressor and turbine wheel upgrade may cost say $800 + CT-26 @ $350, were looking at $1,150. So what alternative, unmodded turbos are around that can produce similar flow rates at say up to $2,000, without looking for crazy Kw.
Also, is a high flowed & turbine wheeled CT-26 likely to be all that reliable. Do we need to consider Ceramic this and that, or are we better looking for a roller bearing turbo?
Your right, the 1JZ is popular, the twins tend to fail, there is a market here, and i'm very interested to see where this discussion goes.
Michael
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Location:
Brisbane
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 04:30
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The CT26 is actually one of the biggest readily-available OEM turbos you can get. If you want more flow than they can handle, you pretty much have to buy an aftermarket job (big $$$) or upgrade an OEM turbo (medium $$$). I've heard of CT26's being upgraded with a TO4 compressor housing and wheel - perhaps that's an option worth considering? That would get you into the 400hp range I think.
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Location:
Newcastle, NSW, Australia
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 04:47
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Corvid, while I understand your intention is to gain a moderate power increase with just changing the twins to a modified CT26, others in this thread did start discussing other, larger turbo’s hence the reason for my post. Even with the CT26 you will no doubt find power will be limited by the factory injection rather than the turbo itself.
Even if you ONLY do manifold ($500 to $1000), modified CT26 turbo ($1200) and aftermarket ECU, your well into the $5000 bracket. It really doesn’t take much to bump that to $8000.
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Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 08:00
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I am about to put TWO CT26 turbos on my Soarer,but my Supra mates say it will be a dog,so slow off the line that my 1/4 mile will be no faster.The problem with Ct26 turbos,are that in standard form,they max out at 180 rear wheel kW,whereas my standard CT12A twins are blowing 220rwkW at the moment.Zoom magazine suggested that the CT26 with a T04E compressor wheel will deliver 230rwkW,which isn't enough gain for me.
So what to do?I think I'll just have to save for a Garrett GT30,with the .63 exhaust housing A/R ratio(lowest ratio due to my car being an automatic)
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Location:
North Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 10:14
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I tell you they are good for a bit more than that.
Last dyno day i got 214rwkw and the tubo was no where close to going hard. So thats about 240kw>250kw at the engine and it had plenty left in it.
I agree though, it will be a bit of a dog with TWO factory ct26's on a 2.5lt. They are fine on a stock 3lt with one so two on a 2.5lt that will be pretty laggy but a definite dyno killer! 
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Location:
gold coast
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 11:35
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| Grant wrote on Thu, 03 October 2002 14:47 |
Corvid, while I understand your intention is to gain a moderate power increase with just changing the twins to a modified CT26, others in this thread did start discussing other, larger turbo’s hence the reason for my post. Even with the CT26 you will no doubt find power will be limited by the factory injection rather than the turbo itself.
Even if you ONLY do manifold ($500 to $1000), modified CT26 turbo ($1200) and aftermarket ECU, your well into the $5000 bracket. It really doesn’t take much to bump that to $8000.
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Here, Here...
$8000 at least.
After market computer and tuning $1000-4000
New Turbo $2000+
Manifold $1200
Wastegate $700
Injectors $500-1000
Clutch $600-1800 (I intend to spend $1800)
Fuel pump $350
Without i/c piping and misc stuff, the tightass total is $6500
I will have spent $6000, with no idea of how well the finished product will go. Still need to spend about $1000.
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I supported Toymods
Location:
Perth WA
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 12:05
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If you go for an aftermarket turbo, I'd think about a Garrett GT30 ball bearing turbo. In the end you want bang for bucks, and once you upgrade injector/computer/fuel pump/intercooler/ transmission, you should (budget to) have enough headroom to go much higher than a converted second hand turbo. If you start with a new manifold you can afford to go for a clean sheet approach. Most of the CT-26 users would use them because they already have one, or it will bolt on to their manifold. To get the additional 100hp from 400 to 500 costs comparatively little once you have already bought all the support systems.
Also, I beieve HKS$$$$ make GT30 series turbos with internal wategates if you wanted to save on plumbing (i.e. HKS 3040 pro? / 3037 pro II?). The down side - rated only 440? hp.
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Location:
Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 14:33
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I'd personally prefer any newer Garret ball bearing based upgrade rather than an older Toyota specific design.
I'd rather pay a few $$ more for modern/efficient/reliable technology with a huge aftermarket supprt base like Garret has.
I'd also prefer two smaller turbos than a big single to minimise lag and mainatin the low down torque which is a feature of the 1J.
Anyone know if GT28, GT2835 and GT30 flanges are the same?
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Location:
Melbourne
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 19:43
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just incase anyone was interested, theres a Trust T78 with 1JZ manifold for sale in the www.melbccr.com forums for $3k
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Registered:
June 2002
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Re: 1jz Single turbs Conversion
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Thu, 03 October 2002 20:33
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Once again the $$$ come down to how you spend it.
If you drop your car off at the mechanics and say "I want it back with a single turbo & +300kw" then your going to get stung for some big $$$.
Were as if your a bit of a DIY'er and know what your doing you should be able to do it alot cheaper.
FYI. GT28 & GT2835 have the same flange. same as a T25 & T28.
The GT30 has a T3 flange.
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Fri, 04 October 2002 04:42
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OK,
Most of you guys may think this is a little crazy. But assume you are running an OEM computer with Apexi S-AFC, and your 1JZ Twins drop their turbine wheels. Expensive to get an alternative.
Is the Ct-26 likely to be a good cheap replacement. ie; Exhaust Manifold and HiFlow the CT-26 only. Or would I need to replace the OEM computer altogether?
Or would bang for bucks be to put cast turbine wheels on, loosing low down torque. Wouldn't you think the CT-26 path to be a reasonable option, for the conservative.
Michael
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Location:
Brisbane
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Fri, 04 October 2002 05:54
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What makes you think you won't lose low-rpm torque with a CT26? The whole reason Toyota used twin turbos on the 1JZ was for faster spooling.
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Location:
Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Fri, 04 October 2002 06:48
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Toyota used twin turbos for the sheer reason that they had (at the time) the strict 208k power ceiling... so why not produce a twin turbo setup which minimises lag in stead and offers good low down torque.
The later 1jz's had a single turbo.
Fact is. If your chasing good hp from a 1jz your going to need to go single turbo.. no point upgrading to two large jobbies i can see.
The 12's are a pretty ordinary turbo from what ive read.
You can tell me that a 1jz would produce more power and a better drive with a flowed ct26 in it?
and whoever said 1-4k for aftermarket computer and tuning?
if you pay someone to put it in yes..
all these prices everyone is quoting, i think are in the wrong spririt.. most of the people on here are DIY'ers.. well i know i am.
Im not looking for a flame war, just trying to understand what everyone wants. If i get these manifolds made up i just need a general consensus as to what would be the best generic/easy to acquire turbo to use?
Most of the info people are putting here is very helpfull.
As for alot of the negative comments.. all i have to say about that is..
"nothing ventured, nothing gained"
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Fri, 04 October 2002 07:24
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| Corvid wrote on Fri, 04 October 2002 16:48 |
and whoever said 1-4k for aftermarket computer and tuning?
if you pay someone to put it in yes..
all these prices everyone is quoting, i think are in the wrong spririt.. most of the people on here are DIY'ers.. well i know i am.
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Do you know where to get an M800, loom and sensors for less than 4000? I'm interested. 
Your idea is great and your initiative should be applauded. What you are finding is that it is impossible to please everyone. There are going to be a gazillion different opinions as to the right way to go so it will be impossible to strike the right chord. The realistic 8-10K price tag to do the job properly will dampen enthusiasm too. If it really was a cheap thing to do, then there would be as many big single 1JZs as there are JZ powered Cressidas (no offence intended). 
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Location:
Southern Sydney
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Fri, 04 October 2002 08:28
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I'm just thinking here.... let me know if this is a stupid idea.
Would it be possible to design a High Flowing Manifold that had interchangable flanges, and then also manufacture a number of different flanges to suit different Turbo's.
It may introduce a bit of turbulance into the manifold but would possibly reduce the costs if there were a number of out of the box solutions.
Just a thought... has this ever been done before or does anyone have any comments on the idea?
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I supported Toymods
Location:
Perth WA
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Fri, 04 October 2002 08:58
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I read of a guy in WA who made some adapter plates for t28's to fit on his standard 1jz manifolds in a Soarer. With NOS he had 400hp at the wheels. He must have a workshop or something because he "did it all himself".
One thing that does slightly put me off twin conversions is the extra cost. Unless you went really big with a single you probably could live with a bit of lag in return for the tremendous top end.
JZZ30MAN - I was quoted $900 EACH turbo to recondition and fit metal turbines to CT12a's. They are meant to be good for about 230-240 RWKw (a marginal improvement). Even at $1800 it is still cheaper than getting a custom manifold + turbo + dump-pipe +/- external wastegate. It depends on how much gain you want for your dollars, because once you take the leap - you might as well get a new generation turbo for those extra (reliable) horses.
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Location:
gold coast
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Fri, 04 October 2002 10:26
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It would be really easy to make some adapters to mount bigger turbos on the stock manifolds, but they would restrict flow... bigtime.
There is a JZZ30 up here with 2 x T28's. It puts out 350RWHP on custom manifolds.
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Location:
North Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Fri, 04 October 2002 13:20
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This is just my opinion and from what I've experienced in the past couple of weeks.
Use the same square flange off a CT-26 which is the same basic outer pattern as a Garret T3.
After I saw you the other night Corvid i went home to see how i will have to make up a flange for my ct-26 to bolt onto the manifold that used to have HKSPete's Garett T3 off it. Turns out no flange required!!!! All i need to do is grind out the circular intlet on the ct26 exhaust housing to be rectangular. It's hard to explain but basically cut a bit further into each corner of the circle if you get what i mean.
I'm suggesting this cause HKSPete's old turbo is the type of size and power of the turbo you would expect ppl to bolt onto your manifolds. And as a bonus you can put ct26's on it with about 20mins of preparation. That would make everyone happy or happier. I can give you the flange in the meantime to copy as i'm waiting on getting my manifold back
Hope this gives some direction to the thread.
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Location:
North Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Fri, 04 October 2002 23:11
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Woops in the above post I meant T04 flange not T3.
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Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Sat, 05 October 2002 00:44
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Mike,if you blow your ceramics,ask the turbo shop to install CT12 steel wheels(found on 2 litre twin turbo supras,GA70,1GGTE).These have the same base diameter as CT12A ceramic turbines, and share the same shaft diameter.Even though they weigh 166grams,twice as much as the ceramic wheel and shaft,they hit positive boost at exactly the same revs.Unfortunately,there is no power difference,according to my before and after dyno.Not surprising either,given that you are running the same compressors at the same boost.However,you can be confident in winding the boost up a bit.Any shop charging you more than say $900 total to do this repair(both turbos) is ripping you off IMHO.This is assuming your compressor wheels are not damaged.
SUPRAGTE,can you confirm that you had 214 rear wheel kW on a standard CT26 turbo?What boost were you running?
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Location:
North Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Sat, 05 October 2002 06:51
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I can confirm I got 214rear wheel kilowatts. It's a ct-26 from the outside but has T04E internals with a 10% clip on the exhaust trim.
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Location:
Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Sat, 05 October 2002 09:44
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214 is mad but pple are claiming that with the 12z...personally i like the sounds of a gt30 but i might be going down the steel turbine 12z rout i really want reliabillity over everything....but if i go the single i think the gt30 is just right!!!
grant isnt this what lukes running exept his is a really big one yes???
ps... sard 540cc injectors are $260 each = $1560
apexi powerfc $1950 + $750 for handset or $4000 for a motech + dyno tuning - $80 - $150 per hour
turbo gt30 around $2000 - $2500
manifold about $1000-$1200
Intercooler $1000-$3000
filter and intake piping $250 - $500
dumppipe
auto
tailshaft
diff
= lots of fun
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Sat, 05 October 2002 09:48
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You forgot the big ass wastegate 700-1000.
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Location:
Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Sat, 05 October 2002 09:57
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umm from memory isnt the gt30 come with an internal???
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Location:
Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Sat, 05 October 2002 10:00
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[quote title=E30-323ti wrote on Thu, 03 October 2002 10:25]
Trust do one, but it's like $3500. quote]
have you seen the blitz one looks wild thier turbo kit in aus goes for 10 large ones.....ummm outta my buget 
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I supported Toymods
Location:
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Re: 1jz Single turbs Conversion
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Sat, 05 October 2002 10:02
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Ooops missed that....could be. 
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Location:
Sydney Australia
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Sat, 05 October 2002 19:27
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""grant isnt this what lukes running exept his is a really big one yes??? """
Ummm ... no! I have a stock 1jzgte. I think you mean Joey from newcastle who was the pioneer of Modified Cressida's.
PS: Joe!, i just blew another diff! AHhh. 2 down, need $$ for something stronger!
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Location:
North Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Sat, 05 October 2002 23:08
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At the last dyno day the most a 1jz got was like 190 and thats ruuning your unreliable c12's at full boost. They dont last long like that. Anyone who tells you they are running over 210kw in Australia i'd be sceptical of. In the states all the dyno's are overated, that's why you see them getting 360rwhp out of stock c12's, its a bit unbelievable.
So where do you guys get quotes of $1000-$1200 for a 1jz exhaust manifold? Thats extremely cheap!
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Location:
Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Sun, 06 October 2002 06:33
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oops i stand erected sorry mate
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Location:
Newcastle, NSW, Australia
Registered:
May 2002
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Location:
Sydney
Registered:
May 2002
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Location:
Southern Sydney
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Tue, 08 October 2002 08:45
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From what I've read on these forums the general consensus is the only mods people consider doing to a 1JZ are:
1. Bigger exhaust (dump pipes etc.)
2. More boost (bigger intercooler too)
Generally in that order.
While I'd agree with Supragte that more than 210rwkw is probably the limit with the above modifications on standard turbos.... surely there are other mods that can be done while keeping the stock hair driers.
Are there any gains to be had through mods such as porting/polishing or through changes to the Cams etc.
Has anyone gone down any other roads than the norm? What were your findings?
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Tue, 08 October 2002 10:41
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luke... how do you keep making diff soup? it's demolishing poor rexy drivers isn't it?
just wondering, what is your diff like? 'cause I'm curious to know if the ma61 diff will hold, or if a conversion will be needed
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Location:
Newcastle, NSW, Australia
Registered:
May 2002
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Location:
Sydney
Registered:
May 2002
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Re: 1J Boost and Power
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Wed, 09 October 2002 01:59
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Ok, at the end of the day dude.. Im interested to see who would be interested in a single turbo manifold..
As for someone saying port polish the head.. Thats an expensive and very time consumingjob when you could just put the resources towards a single hairdryer to push decent air inside..
I feel a ct-26 with t04 internals would be the cheapest/easiest way to go.
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Location:
NSW
Registered:
August 2002
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Re: 1J Boost and Power
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Wed, 09 October 2002 02:21
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How about a manifold for the CT-26 (T04-E) and a Garrett T-03 as SUPRAGTE suggested, seeing the flanges are almost identical.
Maybe somebody could look at the likely power curve for the Bucks on both these options.
I'd imagine the CT-26 with T04 config. would be a little laggy on a 2.5 litre six, don't know too much about the Garrett.
Then could both run 16psi reliably. I imagine the Garrett could.
Should we be waiting to see how much the new Falcon Turbo's are going to cost?
The answer may lie in somebody doing research on the parts and materials cost for all the turbos suggested above. Any takers?
Michael
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Location:
Wollongong
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Wed, 09 October 2002 02:24
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Corvid, I think you have the right idea.
For a budget upgrade, I think the CT26 idea is a good one. Do they use steel wheels or ceramic ?
And what costs would be involved in replacing the internals with T04 bits ?
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Registered:
August 2002
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Wed, 09 October 2002 02:49
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It has been made to work in the past having two different sized turbos. The problems start to happen when you increase the boost pressure as the smaller one doesn't stand a chance of being as efficient as the larger one and tends to die from overspeeding. ie. Subaru Liberty B4.
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Wed, 09 October 2002 02:49
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The CT-26 has a steel turbine wheel, which I understood could not be swapped, due to the construction of the housing. A clip to the stock wheel is all I have heard about.
I did see a thread above that mentioned changing the turbine wheel. Wasn't that by you Corvid "CT-26 with a decent turbine wheel". If this can be done its worth persuing - anybody know the answer??
A T04-E mod to a CT-26 (T04 compressor and an Exhaust clip) has been quoted to me several times at $800. I'm certain this is a close enough figure to work from. I'm also told they are known to be laggy on a 7M-GTE and that they are known to fail as well. Although the turbo shop tells me they only fail because ppl running silly boost levels, like 25psi. Anyway, T04-E result would be say $300 for turbo, $800 for T04E work plus a few other bits & self install, say $1,500 (assume reliable at 16psi)
Will the standard ECU be able to run this turbo? Otherwise we are up to a lot more $.
By comparison earlier, a non-rip-off price for steel turbines on the CT-12a's was $900 total. (apparently reliable at 16psi).
CT-12a stell wheels are cheapest. Both are laggy solutions. CT-26 T04E has more potential power and probably less reliable.
If somebody has any ideas about the Garrett T03, the one on the Falcon, any of the GT's - cost, power curve, need to new ECU, injector, fuel pumps etc.
Obviously we should be looking at two setups. One for conservative power increase for failed CT12A's, and one for Big Power Gains.
To keep the majority happy, maybe two manifolds need to be made?
Anybody close enough to the industry to price the alternative turbo's for the two purposes? Start a spreadsheet with Model, Price, Advantages, Disadvantages, Additional mods necessary, and the like, then post it here to further the discussion?
Michael
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Wed, 09 October 2002 07:09
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See the threads on the 1JZ vvTi single turbo. Interesting discussion!!
If the latest vvTi single turbo 1JZ has a modernised CT26 our answer may lie there. There were some interesting Compressor and Turbine dimensions.
If we could get that turbine dimension, and low spool up early torque figures it would be great. Then add the T04 compressor wheel?
Could the solution be to mod our 7M's CT-26 by taking off the exhaust housing and swapping for the modernised CT-26 housing, so we can get that turbine?
Toyota have more time, engineers and money than we do, so I imagine there's a chance they have something here. Any thoughts?
Can anybody get one of these turbo's and pull it apart along with a 7M CT-26, to see what we can do??
Big ask I know.
Michael
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Thu, 10 October 2002 06:06
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Gee, wern't my last two comments a conversation stopper!!
Ok i've done a little work and produced a table in MS-Word so we can compare ideas and share information, insert into document and post back.
Anybody prepared to do some research, add some data, so we can further this discussion?
Note: My table may not contain all the correct facts. I have listed some of the turbo's other mentioned and who originated.
If anybody has knowledge of whether particular turbo's will require us to upgrade ECU, Injectors, Fuel Pumps and the like, this information will be useful.
Don't let this thread die, as i'm sure there is potential for a lot of us to benefit.
NOTE: i HAVE POSTED A WORD FILE TO THE CARS FOR SALE FORUM, AS IT IS THE ONLY PLACE I CAN POST AND OTHERS DETACH AND UPDATE.
Michael
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Location:
Sydney
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 10 October 2002 11:21
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mate you got a cool idea and if we can make it work thers going to be alot of upset nismo, rexies and falcadores going around!!!!again i like the idea of using a newer style twin ball bering gt 30 but again on a buget we cant be to choosy
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Location:
Sydney
Registered:
October 2002
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Re: 1jz Single turbs Conversion
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Thu, 10 October 2002 13:39
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hi guys,
was wondering if the 1jz manifold are the same as the 2jz manifold?
if they are,i would be interested in the manifold for a single turbo,the only thing is,i would go for a aftermarket bigger single(garett,trust...ect)
if you do go ahead with it,let me know.
cheers
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Location:
gold coast
Registered:
May 2002
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Re: 1jz Single turbs Conversion
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Thu, 10 October 2002 22:58
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Welcome to Toymods, MAZMAN.
The 2JZ exhaust and intake flanges are different to a 1J, although the heads will interchange. 1J heads are made by Yamaha, 2J's are a toyota built item.
I have no idea which is better, although if i could find someone with a flow bench i could have them compared.
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Thu, 10 October 2002 23:49
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Pete,
Thanks for all the information you posted in the Word File I placed in the Cars for Sale Form. Very Useful. You have some good knowledge there, and Ouch!! arn't some of those turbo's & kits expensive.
We had a thread on one of the other forums about the 1JZ-GTE with OEM Single turbo producing very high turque figures at 2,000RPM. This Turbo sounds like it could be the goods, particularly, if based on the CT-26 as was suggested, which may mean a T04 could be a good alternative compressor wheel. I'll have a search to see if I can find the topic and thread, so we can add data to the table.
Michael
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Fri, 11 October 2002 00:10
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OK found it.
See Tech Conversions Forum, Real Power Figures 1JZ-GTE, where the discussion leads to the 1JZ-GTE Single Turbo. (373Nm@2400Rpm)Big torque at low RPM. If its based on a CT26 as suggested, how may it go with a T04 wheel?
Note that nowbody seems to know exactly what it is, but suspect its a version of the CT-26. Wonder what mods are being done to the single turbo 1JZ in Japan?
If anybody can fint out, or knows about this turbo, it could produce interesting results.
The Manifold discussion may then be able to head in the direction of two types of CT26, plus the GT30? which had the similar mounting.
Michael
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Registered:
May 2002
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STOCK TURBO HOUSINGS
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Fri, 11 October 2002 01:08
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Guys,
Here is the real low down on what is capable from the stock turbos.
I was talking to turbotechnics in the UK last night and they have spent quite some time researching new turbines and mods for the stock housings.
By raising the inlet and exhaust by 30% from memory and significantly raising the A/R ratio and increasing the number of blades used turbo technics have able to mod the stock housings to support a maximum of 550HP at 28 psi!!!!! Amazing but absolutely true and proven. (2 cars so far). This is also guaranteed for 2 years against any failures.
This all sounds good however until you check the price...
725 pounds each turbo.... ouch! Yes, thats approx. AUD$4,200 for the pair plus shipping.
I am proposing that anybody interested at say the price of $3000 puts their hand up as I'm sure that a bulk order will dramatically reduce the price. Money talks. The real advantage here is that the stock manifolds and intakes can be used, which arent ideal, but do the job. Of course from here you need twin exhaust pipes and a 3.5" exhaust, big intercooler, larger injectors, fuel control of some kind and a larger fuel pump. The only saving is the custom manifold and the fact that it still looks stock. (ie Insurance woes)
If anbody is interested, please reply and I will see if I can negotiate something with them.
On a separate issue, to be completely legal insurance wise, what options do we have for a single turbo conversion?? I'm currently 23 and paying $1075 comprehensive for my 92 type R supra manual running 14.5psi with 3.0" exhaust, fully adjustable HKS suspension, 17's, 4.0" intake, HKS EVC, turbo timer. I envisage this will go down slightly soon.
ps Anybody going to the Perth drags meet at the end of the month?
Cheers,
Pete
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Re: 1jz Single turbs Conversion
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Fri, 11 October 2002 01:08
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Dont forget to make real grunt ( over 250rwkw) you will need aftermarket ignition as the toyota system is not up to the task.
I dont know why you are all bothering with recoed 2nd hand turbo's when a brand new dual BB Gt40 can be had for just over $2g.
This turbo , with the right housings ( you can specify exactly seeing as it is new !!) is good for up to 700 hp and on the right manifold ( not necessarilly expensive) will be making useable boost B4 2500 rpm.
If only 250 rwkw is your aim then stick with the standard ct12a chassis, you wont beat it up to that power level for repsonse.
If I bother going the big single , this is the way I will go. And I certainly wont expect to make 300rwkw without installing a decent ignition system (expect $1100).
my 2c.
Matt
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Location:
NSW
Registered:
August 2002
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Re: 1jz Single turbs Conversion
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Fri, 11 October 2002 01:37
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Matt,
Were not necessarily bothering with recoed Turbo's. We are looking for information about bank for bucks. Whether it be the big bang or the little bank. It depends on what people ar looking for, and not to forget a Manifold (which is where this discussion started.
So if you could go to the Word file attached to this subject in the Cars for Sale Forum, we will all be able to share your information and experience. I like both your ideas. Bang for bucks sounds good for both alternatives. I suppose the other information we need to add is to rough out the cost for the other mods that will necessarily go with the Turbo - there is some provision made for this in the Word file.
Michael
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Re: 1jz Single turbs Conversion
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Fri, 11 October 2002 03:45
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Perhaps Grant (Sixworks) or Celicamad would like to share thier experience of the toyota ignition in application of over 250 rwkw.
Some cars they are associated with have required MOTEC CDI ??
Matt
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