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Location:
Ballarat
Registered:
September 2003
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Highflowed CT20 VS Ct26
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Sun, 07 August 2005 02:09
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well i searched through all the information i could find on here, but couldnt find anything completely specific to what im after.
if cost wasnt a factor: what would create more power/speed on a 3tgte, a rebuilt, high flowed ct20? or a good condition standard ct26?
if i overlooked a thread, if someone could direct me to it thatd be great.
from what i read, the ct20 is a bit of a garbage turbo, but does a highflow bring it in to the territory of the ct26?
cheers
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I supported Toymods
Location:
Sydney
Registered:
May 2002
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Re: Highflowed CT20 VS Ct26
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Sun, 07 August 2005 09:05
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CT20 from a hilux?
A CT26 Twin entry. would be cheaper and alot easier to highflow and rebuild.
I brought a CT20B off a 1993 GRP A 205 and is the biggest waste of money ever. It's hard for places to rebuild the turbo due to the fact its all mixed in and match there's no off the shelf parts for it and to rebuild to oem specs. will cost more then having a CT26 highflowed.
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Location:
brisbane
Registered:
December 2004
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Re: Highflowed CT20 VS Ct26
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Sun, 07 August 2005 09:21
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why would u bother rebuilding it to standard specs anyway.. if your turbo brakes would be a lot beter to hiflow it etc.. thats what id do anyway.
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Location:
Sydney
Registered:
April 2004
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Re: Highflowed CT20 VS Ct26
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Sun, 07 August 2005 10:19
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Good question mate,
Kahn all you turbo experts
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Location:
MACKAY
Registered:
May 2002
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Re: Highflowed CT20 VS Ct26
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Sun, 07 August 2005 11:13
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A CT20 HiFlowed to the maximum will never flow as much as a standard CT26 , Your best option is a single entry CT26 off a ST165 or a 7MGTE as these have steel wheels compared to the CT26 twin entry which has ceramic wheels and are only safe to about 15lbs , also the single entry are a lot cheaper to get rebuilt and HiFlowed, When rebuilding the twin entry a new steel rear wheel and shaft will need to be fitted because the shaft nearly always breaks when it is disassembled , The ST165 CT26 will give good early boost on the 3TGTE and hold around 16 - 20 lbs , The 7MGTE CT26 will come on boost a little latter but should hold 25 - 30 lbs, The ST165 has a 40 mm comp wheel and the 7MGTE has a 47 mm wheel both rear wheels are the same size but the rear housing on the 7MGTE turbo is larger which allows better exhaust flow at higher revs but will give a little more lag , I am using a single entry CT26 with 7MGTE rear housing and HiFlowed comp with 50 mm wheel , This is on my 3SGTE and will hold 30lbs .
Trevor
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Location:
Ballarat
Registered:
September 2003
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Re: Highflowed CT20 VS Ct26
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Mon, 08 August 2005 03:31
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i already have a highflowed ct20 and i dont know whether to use that or to go and buy a ct26. thats why i only cared about comparative power outputs and ruled out the feasability of rebuild and highflowing costs.
thanks ta22 3sgte, will a single entry ct26 deliver far superior power delivery than a highflowed ct20?
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Location:
perth wa
Registered:
June 2005
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Re: Highflowed CT20 VS Ct26
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Mon, 08 August 2005 03:44
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sorry to butt in, but would the fitting of an st165 ct26 onto a 3tgte require an ecu upgrade??
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Location:
Pilbara
Registered:
November 2004
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Re: Highflowed CT20 VS Ct26
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Mon, 08 August 2005 04:58
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I'm pretty sure that the stock ECU will handle the CT26 but you may need to upgrade your injectors and have a fiddle with your AFM adjustment spring. I'd say just upgrading your injectors would do it. I'm planning on this mod and was hoping to get away with just running the CT26 on low boost and not modding anything. Doubtful that this will be a good idea.
At any rate, the stock ECU should manage but I'd definitely go for intercooling if you have the option.
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Location:
MACKAY
Registered:
May 2002
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Re: Highflowed CT20 VS Ct26
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Mon, 08 August 2005 12:32
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The Untouchable , Yes the standard single entry will flow much better.
t18_psi , Fitting a CT26 to the 3TGTE will not need any ecu upgrade if you run the same boost level , if you lift the boost higher than the ecu is programed to run you can fit a rising rate fuel regulator to give your motor enough fuel when on the higher boost , if you fit bigger injectors without an aftermarket ecu to reprogram the fuel curve your motor will run to rich .
Trevor
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Location:
Newcastle
Registered:
June 2004
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Re: Highflowed CT20 VS Ct26
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Tue, 09 August 2005 00:53
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Hey i have a ct26 from a 7MGTE in my gt4 and although its a bit slow to get onto boost for 7-8psi is pulls really well when it gets going. But im not sure how it compares to a high flowed ct20 sorry.
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Location:
Pilbara
Registered:
November 2004
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Re: Highflowed CT20 VS Ct26
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Tue, 09 August 2005 04:50
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if you fit bigger injectors without an aftermarket ecu to reprogram the fuel curve your motor will run to rich .
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What makes you so sure about this statement? There are a number of 3TGTEU with stock ECU's that run bigger injectors.
CLG says
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I'd be happy to run the standard computer till the injectors reach their duty cycle, then I'd be looking for larger injectors that the computer can still run with. It will handle any boost you care to give it - it keeps dumping fuel in to compensate boost, but you will have to address the pistons after 10/11psi - they're not built to take any more.
Althought the computers run rich, they still return good ecconomy, mine averages 9-9.5L/100Km, and I'd rather have a rich forced induction engine, than a lean one, it's a good safety margin.
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Location:
Ballarat
Registered:
September 2003
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Re: Highflowed CT20 VS Ct26
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Tue, 09 August 2005 06:12
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the standard 3tgte pistons can only handle 10/11psi.....?
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Toymods member
I supported Toymods
Location:
Rydalmere, NSW
Registered:
May 2002
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Re: Highflowed CT20 VS Ct26
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Tue, 09 August 2005 06:51
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I had a stock-standard ST205 3S-GTE CT20b twin-entry turbo, until I realised the seals in it were blown. Got it rebuilt, and hi-flowed while I was at it. Precision Turbochargers at Wetherill Park rebuilt mine, but they suggested to completely scrap the guts of the original CT20b because of it's condition, and replace with the guts out of a CT26, and with a 56mm steel-wheel instead. They bored the housing out about 1mm more to accommodate the new comp. wheel... I believe this is what Gary Georgiou did with his ST205 as well. It's a tad laggy up to about 2600Rpm, but from there it's like a rocket. Although this would be too laggy for a 3TGTE.
Just my 2c. 
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Location:
Pilbara
Registered:
November 2004
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Re: Highflowed CT20 VS Ct26
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Tue, 09 August 2005 08:13
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I think that when we talk about what any parts can handle, it's better to talk of what the safe working load is rather than what they can handle. I know of people who have run 12psi without intercooling but for how long? At 10psi it's doubtful you will have any dramas at all, even without intercooling.
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Location:
Pilbara
Registered:
November 2004
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Location:
Pilbara
Registered:
November 2004
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Location:
Ballarat
Registered:
September 2003
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Re: Highflowed CT20 VS Ct26
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Tue, 09 August 2005 09:34
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and with intercooling, bigger injectors and aftermarket computer, what boost is safe then running completely stock internals?
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Highflowed CT20 VS Ct26
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Tue, 09 August 2005 09:43
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that all depends on the tune.... if you tune it past the limit, it will die, but if tuned a little conservatively, it will last a lot longer.. for any given boost level...
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Location:
Ballarat
Registered:
September 2003
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Re: Highflowed CT20 VS Ct26
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Tue, 09 August 2005 10:01
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ok, so does that mean running it a bit rich?
for the things ive listed, with a highflowed ct20, what would be max boost level i could run? with out going into the real dangerous territory?
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Location:
Pilbara
Registered:
November 2004
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Location:
NSW
Registered:
August 2003
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Re: Highflowed CT20 VS Ct26
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Wed, 10 August 2005 04:33
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Are all you guys talking about the CT20 or CT20B(off a Gen 3SGTE).
If it's a CT20B, which i read is a revision of the CT26, am i right in saying i would be better off getting a CT26 and highflowing it rather than using a standard CT20B for my Gen3 3SGTE.
Assuming i run the same boost pressure on each turbo are you guys saying the CT26 should flow more air or does it all depend on what is used when highflowing the turbo.
Perhaps i should be comparing like with like. Which is better a Standard CT20B or a Standard CT26 at same boost pressure?
If you are all talking about a CT20 and not a CT20B then ignore my post.
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Location:
Ballarat
Registered:
September 2003
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Re: Highflowed CT20 VS Ct26
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Wed, 10 August 2005 05:21
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im talking bout a CT20, as title goes, not the mysterious CT20B
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Highflowed CT20 VS Ct26
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Wed, 10 August 2005 05:58
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doesn't the mysterious CT20B/CT26 have integral exhaust manifold/housing? ie ST215/245
the real CT20B was a very very limited race only item no?
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Toymods member
I supported Toymods
Location:
Rydalmere, NSW
Registered:
May 2002
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Re: Highflowed CT20 VS Ct26
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Wed, 10 August 2005 07:18
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| oldcorollas wrote on Wed, 10 August 2005 15:58 |
the real CT20B was a very very limited race only item no?
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The guys at Precision turbochargers told me that I had a CT20b on mine, as it came off a Jap-spec ST205. 
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Location:
Pilbara
Registered:
November 2004
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Re: Highflowed CT20 VS Ct26
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Wed, 10 August 2005 09:28
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not the mysterious CT20B
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LOL this mysterious thing has been covered in other posts.
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I supported Toymods
Location:
Sydney
Registered:
May 2002
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Re: Highflowed CT20 VS Ct26
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Wed, 10 August 2005 09:34
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| bunkyT18 wrote on Wed, 10 August 2005 19:28 |
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not the mysterious CT20B
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LOL this mysterious thing has been covered in other posts.
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I brought one of these turbos. Biggest waste of money ever. if you buy a stuffed up one nobody stocks rebuild kits for it. seals, shaft and everything was schorched. ended up going back to a ct26 steel wheel
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Location:
Ballarat
Registered:
September 2003
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Location:
Parramatta
Registered:
July 2002
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Re: Highflowed CT20 VS Ct26
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Thu, 11 August 2005 04:51
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ok all this talk of turbos, and no one has suggested something other then toyota, ct20 or ct26 there are in betweens some of which would work sensational i hate to sayit but if you can get your hands on a t28 from an s15 this would outperform most of the standard toyota turbos. for what you are after it will be less laggy, its not that big well not as big as the ct26 and it will provide boost until redline. if that is too costly then maybe a normal t28?????
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Location:
Ballarat
Registered:
September 2003
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Re: Highflowed CT20 VS Ct26
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Thu, 11 August 2005 06:03
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but do they bolt to the manifold with the ease of the ct26?
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Location:
Canberra
Registered:
June 2003
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Re: Highflowed CT20 VS Ct26
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Fri, 12 August 2005 02:45
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For a small turbo the CT20 is laggy for sure but if you are only chasing 200hp or so flywheel and you have a rebuilt turbo then may as well stay with it.
The single entry CT26 from the 7MGTE is almost a straight bolt on for the CT20. You just drill out the threaded stud holes and use bolts with nuts. This will give you more hp headroom and a vast array of potential upgrades. Suprisingly bugger all difference in lag. Boost comes on later but the greater flow at any particular boost levels means there's no drop in performance.
The twin entries aren't for you as they would require a custom manifold.
As for boost level, the stock internal 3TGT will take shitloads...20psi easy with an appropriate tune. The key, as with all turbo motors is tune, get it right and they will produce great hp in stock form...get it wrong and they go bang.
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On Probation
Location:
Hobart
Registered:
December 2004
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Re: Highflowed CT20 VS Ct26
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Fri, 12 August 2005 03:35
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are CT26 from 7M in stock form really capable of running 25-30 psi ?
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Location:
Canberra
Registered:
June 2003
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Re: Highflowed CT20 VS Ct26
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Fri, 12 August 2005 03:40
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Not efficiently, you would be way off the map at those boost levels. I have run the CT20B compressor wheel to 19psi to good effect so i suspect the Supra compressor would perform well up to 20psi. I have no data but very unlikely it would perform well at 25psi and no chance at 30psi...it would be overspeeding badly and producing a very hot intake charge.
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On Probation
Location:
Hobart
Registered:
December 2004
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Re: Highflowed CT20 VS Ct26
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Fri, 12 August 2005 03:43
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would it be effected at all with only a stock cooler ?
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Location:
Canberra
Registered:
June 2003
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Re: Highflowed CT20 VS Ct26
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Fri, 12 August 2005 03:49
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Are you asking does the cooler effect how much boost you can run? The answer is yes but other factors come into play as well. Basically, the more efficient the cooler is as a heat exchanger then the more boost you can run for the same temp intake charge when compared to a less eff cooler.
There is also the issue of flow eff to consider. The smaller the pressure drop across the core the less work the turbo has to do to supply the same flow level to the engine therefore the less heat you are generating.
replacing the stock IC with a more efficient flowing and cooler core will net you a substantial gain in hp and let you run more boost if the rest of the setup is up to it
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