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Write ups and tutorials for maintenance and modifications.
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Adjustable turbo boost

Sun Nov 22, 2015 10:47 am

Hi all, I am considering fitting a boost controller, does it make a difference to performance, my car is a 92 gt4, cheers
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Re: Adjustable turbo boost

Sun Nov 22, 2015 9:36 pm

Yes. A simple manual one will do the trick. Fuel cut is ~12-17PSI (depending on the market and year of the car). I personally wouldn't go much past 10 PSI on a stock engine with factory head gasket. Also, the factory ATA intercooler is quite restrictive, if you can replace that with an aftermarket unit like ARC or Bay Area, you will get about 2 PSI right there.

You'll need to do this first for any boost controller (manual or electric) to work. http://www.turbocelica.nl/howto-tvsv.htm

Also, I would read this http://www.mrcontrols.com/primers/power.htm

http://www.mrcontrols.com/primers/turbo.htm

Re: Adjustable turbo boost

Sun Nov 22, 2015 9:43 pm

Cheers for the info, the-replacement intercoolers you speak of are they the front mounted type , I live in the uk so not familiar with the brands you mention.

Re: Adjustable turbo boost

Sun Nov 22, 2015 9:48 pm

They are top mount and direct replacement - so very easy to do vs. front mount. Both are discontinued unfortunately. ARC is a Japanese brand, Bay Area was made in the states.

Re: Adjustable turbo boost

Sun Nov 22, 2015 11:56 pm

You can also find an RC ST185 top mount (direct replacement), which would be a water to air setup. A lot better than having an air to air top mount.

Re: Adjustable turbo boost

Mon Nov 23, 2015 8:08 am

Thanks, but i read in another club forum that the CS intercooler is not that straight forward swop in a standard 5 th gen gt4, anybody have experience of the upgrade ?

Re: Adjustable turbo boost

Tue Dec 08, 2015 11:45 pm

Gt4grey wrote:Thanks, but i read in another club forum that the CS intercooler is not that straight forward swop in a standard 5 th gen gt4, anybody have experience of the upgrade ?


It bolts right in, then you just need a heat exchanger, pump, and some coolant lines to connect it all. Wire a switch for the pump or have it run all the time and that's it.

Re: Adjustable turbo boost

Wed Dec 09, 2015 7:39 am

Thanks for the info, i`ll start looking.
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