x-911racer

Having a problem with over boosting on my Automatic FD

I have just installed a full exhaust system, ECU piggyback, etc.. the boost is in a normal pattern between the two turbos but between shifts it will very quickly creep to 15 psi unless i quickly lift off the gas.

this happens in hold mode or in drive mode any Ideas how to control this

Thanks

moralesrx7

i have the same problem iam currently trying to design a blow off valve that works off the rpm voltage as the voltage raises it closes but at any decrease it opens but besides that you cant do anything i just completely let go off the gas as i shift to 2nd and so on as if you where driving a stick

mjw

iTrader: (1)

I had an overboosting problem as well when I started to mod my car, not boost creep from the small wastegates, but it would just spike right up like that. Until I can afford an ProfecB or the like I yanked out the stock wastegate/prespool hoses and installed some bleeder valves from Home Depot, cured the problem instantly.. and now I can adjust my prespool/boost which is great. Check out this link:

http://www.robrobinette.com/boost_controller.htm

Matt
93 SSM

ejmack1

Well the tranny should shift fast enough that it does not have this problem, i remember having a similar problem... but oh yeah... that was with no WG solenoid connected

CantGoStraight

Put larger pills in the waste gate and precontrol hoses to lower your boost. With everything you've done a boost controller of some sort is in order even if it's the manual one.