GT-Four "WRC" inlet manifold and throttle body

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JD
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GT-Four "WRC" inlet manifold and throttle body

Post by JD »

http://www.ebay.co.uk/itm/Toyota-Celica ... 20f2f416a2

Image

Has The Water Injector Thing In There Which STandard Ones Dont


So the water injection into the throttle body? Toyota did it that way? Have I got this all wrong and could someone explain? Bob "direct port" Hatton, what have you to say about this?

Would this fit a Rev 3?
shinny
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by shinny »

JD wrote:So the water injection into the throttle body? Toyota did it that way? Have I got this all wrong and could someone explain? Bob "direct port" Hatton, what have you to say about this?

Would this fit a Rev 3?


Yes, the water injection is part of the WRC setup.
Yes, it would fit a rev3.
No, I don't know how it would work off the top of my head.

AFAIK the WI port isn't fantastic. Still, it's pretty tempting, bar the price
shinny
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by shinny »

Info on the ST205 WI is here: http://www.gtfours.co.uk/what/wrc/wi/wi.htm
JD
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by JD »

Thanks very much shinny - it does look rather basic, but I like it. I think I'll stick with direct port :thumleft:
shinny
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by shinny »

I think the description on that webpage is lacking something... what he describes as the WI valve looks like a pressure regulator to me, and what he describes as Wi Line 2 is actually a vac line to control the water pressure being produced.

TBH, a manifold with a perfectly placed WI nozzle would be an ideal starting point for an install... especially for those of us who don't have intercooler pipework to inject into! :wink:
Ryan S
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by Ryan S »

Apparently these have an antilag valve on them too a friend has informed me, as he uses one of these.
shinny
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by shinny »

sheppy wrote:Apparently these have an antilag valve on them too a friend has informed me, as he uses one of these.


I'm not sure the intake manfold have anything anti-lag related on it. The exhaust manifold has ports on it for anti-lag though :thumleft:

That said, reactivating the antilag from a WRC would not be advisable...
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by Ryan S »

Apparently it was never activated from the factory, just had to be on the cars to qualify for use in the WRC. Literally just talking about it when this post appeared, the antilag valve deffo on the intake as it bypasses air into the exhaust or something, no idea, mid nineties experimental stuff i guess.

Gaaah, yeah it's on the exhaust manifold, read the text completely wrong!
shinny
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by shinny »

sheppy wrote:Apparently it was never activated from the factory, just had to be on the cars to qualify for use in the WRC. Literally just talking about it when this post appeared, the antilag valve deffo on the intake as it bypasses air into the exhaust or something, no idea, mid nineties experimental stuff i guess.

Gaaah, yeah it's on the exhaust manifold, read the text completely wrong!


The bypass valve appears to have been built into the blow-off valve. The antilag activates by blowing air from the induction tract (not the inlet manifold) into the exhaust manifold while the engine runs extra rich, causing explosions in the manifold. AFAIK all that was missing from the system was the code in the ECU to drive it. However it causes massive strain on the turbo even if you get it right... don't go near activating it yourself if you like you engine.
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by Ryan S »

Pretty cool stuff, yeah i'm sure the rally team were using a better turbo than the ct20 as well :) although i guess at the time it was a pretty good turbo.
shinny
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by shinny »

sheppy wrote:Pretty cool stuff, yeah i'm sure the rally team were using a better turbo than the ct20 as well :) although i guess at the time it was a pretty good turbo.


TBH, the rally teams wouldn't have minded replacing the turbo every couple of thousand miles, CT20b or not
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by Ryan S »

shinny wrote:
sheppy wrote:Pretty cool stuff, yeah i'm sure the rally team were using a better turbo than the ct20 as well :) although i guess at the time it was a pretty good turbo.


TBH, the rally teams wouldn't have minded replacing the turbo every couple of thousand miles, CT20b or not


yeah deffo man, just not sure if they would have used the stock turbo, would be amazing to see a spec sheet for the cars eh :)
asdrewq
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by asdrewq »

I'm afraid the water injector solenoid will probably be siezed/rusted up solid after all this time, and by all accounts the distribution it offers between cylinders & spray pattern isn't all that great anyway. It is a dual outlet design.

If you are using an ST205 chargecooler, your best bet for water injection location is on the top of the ST205 chargecooler, directly before the 'throttle sock'. either that or drill & tap into the throttle body housing itself just before the throttle.

The gt-four does have a token effort of a water injection pump present (on the washer bottle) for homologation purposes, but it is simply a windscreen washer type, not high pressure as would be actually used, and will not function correctly if it were hooked up & made to work (if it could be made to work after all this time)

The anti lag pipework on the exhaust manifold is also non-functional and requires drilling out if you wish to use. The GTfour WRC air bypass valve for the anti lag does nothing, but i'm not sure if it can be made to work or not.

I used to have a rev3 mr2 turbo, and now have a GT-four!
shinny
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Re: GT-Four "WRC" inlet manifold and throttle body

Post by shinny »

asdrewq wrote:The anti lag pipework on the exhaust manifold is also non-functional and requires drilling out if you wish to use. The GTfour WRC air bypass valve for the anti lag does nothing, but i'm not sure if it can be made to work or not.


Not true... at least not of the manifold itself:

Image
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