WRC CT20b

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WRC CT20b

Postby gt4tified » Tue Sep 08, 2009 7:04 pm

Guys and Gals,

I just purchased a wrc ct20b from an mr2oc board member....I should get the turbo in a couple of weeks and I can't wait!

My genII 3sgte engine is from a 93-95 mr2 and is otherwise internally stock. I just wanted to know, with supporting mods (listed below), would that turbo support 300awhp on a pump gas & water injection tune on conservative (17-18psi) boost?

My intentions as far as mods go are as follows:

Gen3 cams, valve springs
ARP headstuds
MHG
Bored OEM fuel rail, configured for dual entry
Gen3 injectors
Aftermarket adustable fpr
New main bearings and rod bearings, new piston rings
Haltech E6K or similar standalone EMS
Water Injection
Good clutch for 400ft.lb torque
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Postby Simba » Tue Sep 08, 2009 8:35 pm

It'll probably do it, but I doubt you'll be anywhere near "conservative" with the tune to do it. At 17-18 psi, you'll need to run quite a bit of timing to get there.

Lots of fast, loud things.
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Postby klue » Wed Sep 09, 2009 1:35 am

sure buddy, WRC ct20b will blow your balls off, capable of 500ftlbs of torque.
trust me.

im coming down your ways hopefully soon, so get that car ready. BTW forget the haltech get the hydra or aem or motec if your rich
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Postby vip09 » Wed Sep 09, 2009 3:37 am

I will say you make 280awhp at best.
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Postby TRDcelica90 » Wed Sep 09, 2009 10:19 am

how is the wrc turbo diff from the standard ct20??
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Postby Simba » Wed Sep 09, 2009 1:01 pm

The turbo in question is likely a normal CT20b from a ST205 WRC, not an actual rally car. Those used a CT26R, which is a very different animal.

300 whp on a 20b is doable, but not particularly easy.

Lots of fast, loud things.
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Postby gt4tified » Wed Sep 09, 2009 1:55 pm

Simba wrote:The turbo in question is likely a normal CT20b from a ST205 WRC, not an actual rally car. Those used a CT26R, which is a very different animal.

300 whp on a 20b is doable, but not particularly easy.


No Simba, it is a WRC ST205 turbo, not the regular CT20b. I know cuz the guy sent pics of it attached to the anti-lag manifold, and it looked pretty oem. From the info I have gleaned, there were only 2500 of these turbos made.

This is why I was asking the question...cuz from what I heard, you're on the ball when you say its a different animal.

Klue, pm ur # so I'll call you so I know when exactly you're gonna be here...we missed each other the last couple times.

vip09, close to 300hp is fine with me, I'm more concerned about getting as much torque from the engine at that given power.
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Postby klue » Wed Sep 09, 2009 2:00 pm

the man just finished saying its a 205 wrc. there is nothing normal about that turbo.

you can run a ceramic up to around 20 psi before the backpressure in the exhaust puts to much load on the wheel and blows the shit out of it.

STEEL wheel lacks this issue.

500ftlbs ftw, no guess work here
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Postby gt4tified » Wed Sep 09, 2009 3:01 pm

*rubs nipples*

btw klue, pm me your number where you are right now.
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Postby Simba » Wed Sep 09, 2009 9:20 pm

The "ST205 WRC" had a plain 'ol CT20b on the un-drilled homologation manifold. It's nothing like the rally turbos. Those used cast inconel turbines, and other things of general lunacy, to survive anti-lag use.

A 20b is not going to provide 500 pounds of torque no matter what you do with it. It'll make around 250, and 300-odd wheel horsepower, if you squeeze it. Anything above 18-20 pounds on that (or really any production CT) turbo will run it well out of its efficiency map, and you'll do little more than blow hot air. A CT20b turbine will flow enough to make ~300 whp, however, that is the upper limit of the housing, and you're not getting more out of it without serious work.

The CT26R can make all kinds of power, however, chances are very good you don't have one if it came off of a production car.

Lots of fast, loud things.
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Postby klue » Thu Sep 10, 2009 12:09 am

i can tell you have never seen a wrc before.
ill pm you ralph
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Postby WarTowels » Thu Sep 10, 2009 1:30 am

Post the pics
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Postby redGT4 » Thu Sep 10, 2009 2:09 am

don't the ct series have the number on the compressor housing in big letters?
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Postby RedCelicaTRD » Thu Sep 10, 2009 2:39 am

Not all of them. Some ct-26s just say Toyota, all CT20b's only say Toyota.

As for a WRC edition ST205 turbo making huge torque numbers, not likely. The only difference was a steel turbine compared to the regular CT20b. However if it is a TTE WRC turbo that was used on an actual rally car then it could make some nice torque numbers. However, I highly doubt it is a TTE turbo. They are sold few and far between and for usually more then a hole GT series turbo kit would cost.
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Postby smog7 » Thu Sep 10, 2009 2:59 am

st205 wrc ct20b has a steel wheel turbine
not to be mistakened for actual wrc rally cars. their was a limited run of special edition st205 "wrc" cars sold with these turbos, and as previously stated they had the anti lag system also, just not installed.

same turbo that this guy is selling:
http://www.celicatech.com/forums/showthread.php?t=43199


all other "regular" ct20b's have ceramic wheels...

not the same turbo used on the actuall rally cars..

I want one
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