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Location:
A.C.T.
Registered:
April 2004
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Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 01:46
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Hey,
I was just after opinion's for turbo selection on a 1jz-gte (non vvt) to reach 300rwkws. I was looking at a HKS twin 2510 kit but it's no longer avail. I want maximum response possible while reaching the target so would be leaning towards twin's.
I've considered some custom ideas like
Twin T25g's or RB20 T3's....
Any idea's would be great.
Cheers
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Location:
sunny coast, qld
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 02:03
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there is large debate over twin vs single spooling so we won't go there 
I have heard of people getting around that figure with the steel wheel upgrades that Neil from ALSC sells.
Another option is the direct fit HKS t3g twin kit.
IMO single is the way to go though. Only one of everything works out a bit easier and less clustered in the end
P.S I am using a HKS ta45s and my aim is 300rwkw.
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Location:
A.C.T.
Registered:
April 2004
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 02:45
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Hey,
Steel wheel would be an option but the standard pipe work is terrible! At one point I think my thumb would block one of the intake pipes off the front turbo!
I was looking at twin t3g's but I think the size of the exhaust side woudn't be to condusive for response.
I really want BB cores...but who doesn't!
What kind of cost is the ta45s setting you back?
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Location:
Wollongong
Registered:
May 2002
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Location:
Perth
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 04:00
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Out of my price range at the moment - but you're talking about my dream set-up. For new twins, I imagine HKS2510s would be an excellent compromise in lag and power (given their use on RB26's). But that would be very pricey! There are also some Garrett GT25's that put out around 280hp which would work nicely twined (and with internal gate).
GCG's custom hi-flow BB cores also sound good, but also pricey and means retaining the head-to-head flow path. On the up-side, like the T3G's, it'd be a maximum stealth instalation.
All that said, I think a 2nd hand HKS 3040 kit or a new Garrett 3040 would be loads cheaper. There's also a guy here in Perth using a single 2540, which gets around 270rwkw and minimal lag.
GCG:
http://www.gcg.com.au/default_800x600.htm
Cheap Garretts: http://www.horsepowerinabox.com/HPIAB2/category12_ 1.htm
2nd hand kits:
http://www.importbitz.com/turbo.htm
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Location:
Perth
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 05:19
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Another option might be GTR N1's - which go for around $4,000 a pair 2nd hand.
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Location:
opening a can of whoop ass
Registered:
June 2004
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 05:22
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why is your goal 300kw's? what is it about that figure that you want to achieve.
did you wake up one morning as think youd like 300 or did you go for a run in a car that made that power, do you feel you'll need that power to achieve a time or dyno goals. what is it that drives you grass hopper.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 05:27
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My kit came with the HKS ta45s, trust manifold, trust external wastegate, 4” dump pipe, 4” inlet pipe with tubes required & oil lines. That was $2400.
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Location:
Arthurs Creek, Victoria
Registered:
May 2002
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 05:34
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I have a garret GT40 BB on the 1g, which works a treat, but why I say this is in the scheme of things, a new GT40 with our without internal wastegate is a reasonably priced option in light of what the others similar cost new.
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Location:
A.C.T.
Registered:
April 2004
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 06:11
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Thanks for the great resposnes guys 
..J.. : Well my last car was ~190rwkw which was an rb25 180sx. It was decently swift but not the 'throw you back in your seat and pray to god' effect I was wanting. Rather than work the rb25 I thought a new project and a 1jz powerplant was better for what I wanted. 300 is just a number, but I believe you need targets (dreams) when your building a car up from scratch. The quickest car I've been in was an RB20 powered R31 sedan which was reputedly good for around 250rwkw's. At the risk of sounding like a headstrong 18yo (im 24:) I want to be quicker than some chumps I know that have big 'rb26' powered egos.
Chris Davey: Wow that's excellent value for money. My cousin recently bought a T04 'kit' off some guy for $1200 but it was missing just about everything that makes it a kit. V-band connector, dump pipe, lines etc. $2400 for that seems like a bargin.
stradlater: I'm a big fan if the 1g, the same bulletproof internals toyotas engines are known for. What's a gt40 rated at? 800hp? Probably a little to big for what I want
Cheers guys.
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Location:
A.C.T.
Registered:
April 2004
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Location:
On your mum!
Registered:
May 2002
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 07:54
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To achieve that kind of RWHP one would need (in my estimation) about 540hp at the flywheel.
Most ppl (myself included) go too big.
But then I have not made 300 so prolly talking out of my arse.
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Registered:
June 2002
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 10:28
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Slylux on here is running a GT30 (garrett) and around 300rwkw.
A GT30 is on my list right after the twins go pop!!
stradlater:
Isn't the GT40 rather laggy on a 2l??
I've seen a dyno run of a RB25 with a GT35 and it didn't start doing anything till well into 4k rpm range!!
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Location:
sunny coast, qld
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Fri, 28 January 2005 23:35
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I may have missed it but is your 1jz manual or auto? Because if it is auto it will be harder to make that power on a dyno but who cares because it will be faster on the track if well sorted 
Slylux was using an r154 when he did that wasn't he?
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Location:
perth WA
Registered:
January 2003
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Re: Turbo choice for ~300rwkw 1jz
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Sat, 29 January 2005 04:51
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stop talking about be guys ..
haha
im running was running a r154 manual but now im running a getrag 6 speed .. yet to redyno it ( AT HIGH BOOST )
here are the specs
stock 1jzgte non vvti , haltech e6k , garret gt30R ( gt 30 exhaust .82 a/r with a gt40 compressor .7 a/r )
turbosmart 45mm progate , some dodgey homemade 6 runner manifold ( i made it ) and 6x 550cc 2jz US spec inj , 044 fuel pump
made 397rwhp at 20 psi with the r154
with the getrag 6 sp in 4th 302 rwhp at 14 psi ( more boost later )
and it aint laggy .. start making boost at 3000rpm and full boost is by 3800-4000 rpm
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Location:
sunny coast, qld
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Sat, 29 January 2005 06:46
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| slylux wrote on Sat, 29 January 2005 15:51 |
stop talking about be guys ..
haha
im running was running a r154 manual but now im running a getrag 6 speed .. yet to redyno it ( AT HIGH BOOST )
here are the specs
stock 1jzgte non vvti , haltech e6k , garret gt30R ( gt 30 exhaust .82 a/r with a gt40 compressor .7 a/r )
turbosmart 45mm progate , some dodgey homemade 6 runner manifold ( i made it ) and 6x 550cc 2jz US spec inj , 044 fuel pump
made 397rwhp at 20 psi with the r154
with the getrag 6 sp in 4th 302 rwhp at 14 psi ( more boost later )
and it aint laggy .. start making boost at 3000rpm and full boost is by 3800-4000 rpm
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Sorry mate
you have nearly the same mods as me except different turbo and manifold and obviously gearbox. Hmm very interesting
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: Turbo choice for ~300rwkw 1jz
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Sat, 29 January 2005 06:47
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t04z
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Location:
perth WA
Registered:
January 2003
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Re: Turbo choice for ~300rwkw 1jz
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Sat, 29 January 2005 07:16
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what the specs on your turbo chris davey ??? u had it running ?? tuned?/
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Location:
Whyalla
Registered:
June 2004
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Re: Turbo choice for ~300rwkw 1jz
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Sat, 29 January 2005 07:23
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Yeh that is amazing value Chris 
Do you mind if I ask where you got such a kit from?
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Location:
Brisbane
Registered:
July 2004
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Re: Turbo choice for ~300rwkw 1jz
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Sat, 29 January 2005 15:39
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Lots of figures get around.I am posting these for the coincidence factor.14psi 302rwhp.same as Slylux with ct12a's.Cheers.Pete.
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Location:
u.s.a. south
Registered:
April 2004
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Location:
perth WA
Registered:
January 2003
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Re: Turbo choice for ~300rwkw 1jz
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Sun, 30 January 2005 02:24
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yeh but how long does a internal stock rb25 last for .. with anything over 400rwhp .. they dont last !! i know a heap of examples around here that last anything from 1week to 2 months .. at the longest !!
STICK WITH THE 1jz u have made a good choice 1j180 !!!
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Location:
sunny coast, qld
Registered:
October 2002
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Location:
A.C.T.
Registered:
April 2004
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Re: Turbo choice for ~300rwkw 1jz
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Sun, 30 January 2005 05:56
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Thanks for all the info again guys, given me alot to consider.
slylux: Ironically I also have a haltech e6k just waiting to be wired up (as soon as the engines fitted). I must agree a large single turbo probably is the way to go with a ball bearing core. 3000rpm is a good spool time also. I'll also probably be getting an r154 gearbox (or maybe a w58).
quest: You sure love your rb25's don't you I think it's great those guys (if true) are making that kind of power on std bottom end. But really, I want my engine to last more than a couple of weeks. I was very active on the skylinesaustralia forum and was told repeadlty the maximum safe power was around 250rwkw (312hp) by people in the know ie, tuners and engine builders. Even then there was commonly posts about people braking ringlands all the time. IMO getting 500+hp out of a std rb25 will only scare me sh**less when the bonnet explodes with rods and pistons BTW the std rb25 computer cannot be retuned ie when you add a larger turbo so you can't just add a $700 turbo..safely.
The proof is 2 months after I sold my last car the headgasket blew then a rod was bent...enough said.
Chris Davey: How much did you pay for your kit if you don't mind me asking?
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Location:
u.s.a. south
Registered:
April 2004
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Re: Turbo choice for ~300rwkw 1jz
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Sun, 30 January 2005 11:32
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No 1j180, I'm not a rb25 'fan'.
question is, realistically how long would any "street" 2.5L spend in its '300rwkw state of tune' ?
Are these daily driven street cars? You won't be turning the key to 550whp on pump gas and street tires every morning would you ?
Only time I see guys 'push' their machines are for 'dyno braggin' numbers' or drag contests. Otherwise too much power for an s13 u think?
400 is the number a "rb25 buddy" of mine tells me also, and that is where his street rb25/s13 stays... and yep, the car is fast (if thats what you want).
I'd think anybody 'pushing' a stock internal motor' would spring for the benefits of a standalone, instead of a nissan or toyota ecu, eh... these guys did, they know what they're doing and the cars do exactly what they claim, in front of alot of witnesses too.
I've seen a few rb piston failures, but none of the owners are what I'd consider 'smart guys'. I agree the 1j is stronger, but from the 'well tuned' street examples I've seen, the rb delivered the performance.
I suppose their combinations would yield the same results if copy and pasted to a 1j, eh.
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Re: Turbo choice for ~300rwkw 1jz
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Sun, 30 January 2005 11:46
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See the navara in the link below for a 550rwhp daily driver stock internals wrecker motor 1j.
The secret is good tuning and frequent oil changes.
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Location:
Perth
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Mon, 31 January 2005 03:49
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Though pricey, those twin BB units from GCG are looking better and better. They are a ct12, HKS T3G and GT25 hybrid. Capable of putting-out over 300rwkw.
Anyway, Spec. Ed. what's the 1JZ fuel rail you're making????
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Location:
sunny coast, qld
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Mon, 31 January 2005 03:57
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| Celia-Sue wrote on Mon, 31 January 2005 14:49 |
Though pricey, those twin BB units from GCG are looking better and better. They are a ct12, HKS T3G and GT25 hybrid. Capable of putting-out over 300rwkw.
Anyway, Spec. Ed. what's the 1JZ fuel rail you're making????
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if steel wheels can do about 280rwkw, HKS t3g's about 300rwkw or so, do you think the cost of BB GCG ones are worth it over some T3g's?
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Location:
Perth
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Mon, 31 January 2005 04:01
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Prolly not if there's a cheap set of T3G's up for sale - as there is now. But when they go, I doubt we'll see too many more.
And the thought of a NEW BB CHRA spooling up inside a stock looking housing sounds delicious
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Re: Turbo choice for ~300rwkw 1jz
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Mon, 31 January 2005 05:50
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Fuel rail allows a change to top feed injectors, which JTR can supply, these plug into the existing loom, but need some sort of managment to control.
ATM rail does not fit under the stock plenum (JTR can make you a custom one), currently developinga rail for stock intake plenums.
Web page will be updated with pics soon.
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Location:
Perth
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Mon, 31 January 2005 05:57
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| Special Ed wrote on Mon, 31 January 2005 16:50 |
Fuel rail allows a change to top feed injectors, which JTR can supply, these plug into the existing loom, but need some sort of managment to control.
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As in ECU management?
And, how much do top-feed injectors go for (ie, does this work-out cheaper than buying, say, Sard's 550cc 1JZ side-feeders)?
Please keep us posted - sounds interesting!
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Location:
Wollongong
Registered:
May 2002
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: Turbo choice for ~300rwkw 1jz
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Mon, 31 January 2005 11:10
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| quest wrote on Sun, 30 January 2005 22:32 |
No 1j180, I'm not a rb25 'fan'.
question is, realistically how long would any "street" 2.5L spend in its '300rwkw state of tune' ?
Are these daily driven street cars? You won't be turning the key to 550whp on pump gas and street tires every morning would you ?
Only time I see guys 'push' their machines are for 'dyno braggin' numbers' or drag contests. Otherwise too much power for an s13 u think?
400 is the number a "rb25 buddy" of mine tells me also, and that is where his street rb25/s13 stays... and yep, the car is fast (if thats what you want).
I'd think anybody 'pushing' a stock internal motor' would spring for the benefits of a standalone, instead of a nissan or toyota ecu, eh... these guys did, they know what they're doing and the cars do exactly what they claim, in front of alot of witnesses too.
I've seen a few rb piston failures, but none of the owners are what I'd consider 'smart guys'. I agree the 1j is stronger, but from the 'well tuned' street examples I've seen, the rb delivered the performance.
I suppose their combinations would yield the same results if copy and pasted to a 1j, eh.
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I think its been well proven that 1jz and 2jz motors on stock internals can withstand alot higher power numbers than their equiverlent rb's 2jz's in particular where a rb26 falls apart at much over 300kw atw a 2jz will happily make well over that.
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Location:
A.C.T.
Registered:
April 2004
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Re: Turbo choice for ~300rwkw 1jz
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Mon, 31 January 2005 12:18
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quest: I guess it's a case really of wait and see. I do plan to maintain boost/tune to deliver around 300rwkw all day everyday, perhaps with some kind of two stage boost for wet days, because that kind of power would be sucicide in a light car in the wet! Quite few toymods guys have supported the 300 figure as being able to deliver reliable day to day running including several in this thread which are actually making that kind of power now. If worst comes to worst and there is engine failure, a new engine would be around $1000 NET AUD (after selling the damaged engine for $400-500) and a full days work or two too replace.
Soarer: I would buy that kit for sure in two or three weeks after the engine and drivetrain and completed. I don't want to risk spending an extra $4000 (inc injectors + bits) when there could be unforseen expenses...hopefully there wont be because that kit would be damn nice
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Location:
A.C.T.
Registered:
April 2004
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Re: Turbo choice for ~300rwkw 1jz
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Sun, 06 February 2005 04:14
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Thought I'd let you guys know (after your help) I've decided to go twin rb20 roller bearings on a custom mainfold. It's a $1500 (not inc injectors) proposition or like $1100 after I sell the std turbos
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Location:
sunny coast, qld
Registered:
October 2002
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Re: Turbo choice for ~300rwkw 1jz
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Sun, 06 February 2005 09:21
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| 1j180 wrote on Sun, 06 February 2005 15:14 |
Thought I'd let you guys know (after your help) I've decided to go twin rb20 roller bearings on a custom mainfold. It's a $1500 (not inc injectors) proposition or like $1100 after I sell the std turbos
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Does that include all piping and lines etc. as these things can add up quickly. Trust me I know
If I remember correctly, JAZE was running this setup a while back and from what I heard was making some decent power.
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