Difficulty Boosting>>>>

supersc

Registered User
I recently redid my exahust for my SC since that is the first mod that was recommended. I have:

kook headers -> 2.5 downtubes w/hi-flo cats ->3" Magnaflow resonator -> 3" pipe -> dual 2.5 dynomax super turbos..

This exahust sounds great. My only complaint is that it is real dificult to go into boost in first and second gear. I have to literally WOT in order for the boost to peg at 10 psi. Almost anything below WOT simply pulls the needle from VAC to 3 psi. Is this normal? And how can I fix this??

Thanks!!
 
I've heard alot about adding an overdrive pulley to gain
your low end boost back. Search around, there's alot
of articles about this. I guess when you open up the
exhaust, it reduces the backpressure so your boost
drops, guess that compress are is now moving quicker
so it doesn't "build up" to a higher boost. Maybe someone
with more info can comment.

j.. :eek:
 
Yes the pressure isn't building up on the intake side anymore due to the unrestricted exhaust. The good news is that your engine is now using more air volume, You shouldn't see a drop in performance because your engine is now swallowing all of that air rather than letting it build up as pressure on the intake side. Quite normal. If you miss all of that boost I would install a 10% pulley and that should awaken the beat under your hood.
 
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