If I change pulleys, what happens?
I am currently running a 540 BBC, Dart Pro one heads, 9.4-1 Cr. with a Blower Shop 14-71 driven at 5% under on e85. According to the Blower Shop catalog I should be making about 9.5 lb. of boost. If I swap my current pulleys, the boost should go to about 12 lb. Would that a big change or just some change?
My question is, should I expect to have to re-jet the Carbs. Also, should the idle speed change and what kind of hp change would be expected? I am currently making around 950 hp.