Thread: bbv solenoid

will getting rid of this valve and letting the bbv draw in fresh air cause any ill effects? i have the right side of the T fitting on the FPR blocked, the solenoid taken out, and the lower vacuum line on the bbv left off....anybody else running like this?

hey i did put it back on seeing that there were no benefits...i just heard it limits boost at high speeds and TCS but another thing i noticed i am pushing 8.6 pounds of boost on a stock m90 with and intake is this normal?

leaving the lower vacuum line off the BBV does not cause a vacuum leak. i run mine like this because i dont have mine hooked up to the PCM. you need to leave the top one though. it will just not allow the PCM to dump boost under torque management, shifts, and high speed.

8 pounds sounds a little high, but nothing extreme. do you really have that downpipe? it should have opened it up a little more.

yeah, that'd be one hell of a leak. haha.

so its better to run with the solenoid bypassed or it doesnt really matter? will it cause more knock?

It's not really a knock problem. You're just taking away the PCM's ability to pull boost if it wants to.

Originally Posted by Sabrewings

It's not really a knock problem. You're just taking away the PCM's ability to pull boost if it wants to.

correct.

so it can cause nothing but good results....un altered boost levels? i noticed after diasbling at idle i used to be at -21.5 MAP psi and now it reads -17 psi? weird but as long as there are no ill effects i mine as well by pass it then right? will i notice any thing different

youll have to tune around it being like that because the car will no longer limit boost when it wants to. that may mean some knock will appear because it is boosting when it used to be able to dump it.

ok then ill just leave it....im not gettin a tune for awhile