Recent content by JS4FN

Porting out the intake and plenum will absolutely make a difference especially with a set of large tube runners added to the mix. The miniram number 1204 is geared to the stock head because of port size, the 1205 has larger ports geared towards an aftermarket head. Always a good idea to match...

Why would you need premium fuel for a 9.5-1 compression motor with aluminum heads??

Performance chip is good, they bump up your timing and fuel at wide open throttle so premium fuel is needed. 24 lb injectors are not needed. TPI only makes power to 5000 rpm, if you change your intake to a miniram or similar with a cam the rpm jumps significantly that’s when you would need...

Sorry for the double reply, didn’t think the first one posted.

The stock manifolds on the c4’s essentially shorty headers from the factory, unless you go with full headers and exhaust your waisting your time and money. One of the jobs of the smog pump is to send air to the catalytic converter to help it burn bad exhaust gases and keep it cool enough so it...

The stock C4 manifolds are shorty headers. You won’t gain any performance or change exhaust sound in any way. (My opinion).

The noise in the ZF-6 transmission your hearing is at idle only when using a single mass flywheel or a seized dual mass, it’s caused by the clearance between the meshing gears chattering. The reason you only hear it at idle is because when the engine is idling it’s creating a slight pulse. The...

Hey there. Glad to be a part of these forums. I own a c3 c4 and c5.