Increasing engine performance???

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Aug 30, 2001 | 12:47 PM

Mighty G

Thread Starter

Driver School Candidate

Joined: Aug 2001

Posts: 4

Likes: 0

From: So. Fla

Cosidering modify heads of gs400, but need factory specs. and opinions. anyone out there with any helpful news.

Sep 1, 2001 | 10:00 PM

1niceride

Lexus Test Driver

Joined: Feb 2001

Posts: 910

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From: Petal,MS

Mighty G - When you say modify heads , what is that ? Are you talking about maybe bigger headers ?

Sep 1, 2001 | 10:59 PM

Mean Gene

Lexus Test Driver

Joined: Feb 2001

Posts: 1,199

Likes: 1

From: Alabama

Port & Polish?

Mighty - U can always just blueprint the heads by gasket-matching the intake/exhaust runners. No specs necessary there - could even consider Extrude-honing the heads as well as the intake. Then U'd need to modify the fuel system for greater fuel flow to take greater advantage of the changes. An engine's basically just an air pump - the more air U can get in/out, the more power it'll produce. If ya want to know valve sizes, might need to check with Muhammad with SRT or Mike Kilty ( our website head honcho ) as I believe both of them have had the heads off their respective GS4's. In fact, Mike was considering finding a spare GS V-8 & making a stroker motor of it!!:eek: