2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Zenki FC turbo vs. Kouki FC turbo

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Old Jun 9, 2007 | 10:44 PM
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garageRE
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From: Compton
Zenki FC turbo vs. Kouki FC turbo

A stock Zenki FC turbo produces 5.5psi, while a stock Kouki FC turbo producs 7.5psi of boost.

ok i just want to know whats the difference well i know what the difference is as far as performance i read an article on fc3s pro, but how do you know which one you have in your car, i have an 89 (engine) if this will help anyone
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Old Jun 9, 2007 | 11:08 PM
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From: salt lake ut
zenki is s4 kouki is s5. if its an s5 motor then its kouki.
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Old Jun 9, 2007 | 11:09 PM
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I'm a boost creep...
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I wish we could stick to English...

"Zenki" refers to 86-88 Series 4's, "Kouki" refers to 89-91 Series 5's. They actually produce 6.6psi and 8.3psi peak boost respectively, which drops to those numbers above at redline. The difference is because the S5 uses electronic boost control to raise boost. You have an S5.

The centre housings, compressor and turbine wheel are identical on both. They have different exhaust housings and manifolds. The S4 uses a common manifold and the S5 used a divided manifold.
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Old Jun 9, 2007 | 11:15 PM
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garageRE
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From: Compton
ok cool i know i have a s5 engine and turbo but i was reading an article and it just threw me off so i just wanted to get some info on that thanks by the way do anyone know where i can get a good used s5 turbo for cheap
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