i'm just wondering, when you have positive pressure in your manifold, what happens to those assesories that require vacumn such as the brake booster.

 

the brake booster has a check valve in it and shouldn't ever see boost. If you do not have a check valve, then the brake pedal becomes very hard to push....my buddy Zach found that out first hand when his anti-lag setup was finished on his FC....

 

as stated.I just need to know whether or not I need a adjustable fuel pressure regulator for tuning the car with rc 750cc ...or could the 55psi pressure stay where it is at and just slow down the cycle of the injectors?

 

stock FPR will work just fine...i'm sure there is a point where it is necessary, but i'm in the low 300whp range and haven't ever used one...

 

so without the vacumn helping the booster, the brake pedal would be very hard even with the check valve. is that right?

 

i can brake boost just fine and my brakes dont seem to die off too badly...i guess i really am not entirely sure on this answer, but i know what happens to me personally.....

 

Stock regulators are fine.

platinum.

 

It would be like breaking at WOT without boost. Check valve engages either way.

platinum