TeeLew
Well-Known Member
You're kinda coming off as a douche, so bring it down a notch, huh?Also if you have stiffer spring in your blow off valve to only open past 15psi....that's not right. That means if you lift the throttle when you're making under 1- 15psi you're going to not vent the air which is bad
you have equal boost on the other side of the bov which keeps it closed under boost.
the spring is there to keep the valve open under idle vacuum, no stiffer.
this is turbo 101, where did you kids go to school?
It's a compromise. If you have it venting any time you lift the throttle (as they come from TurboSmart), then you don't have to worry about compressor bearings, but the on/off throttle lag is hurt and you have to listen to the damned thing vent all the time, even with essentially no boost (it's the pressure difference between the intake and reference, so even if the manifold has a slight vacuum, it may still vent), because the BOV pressure difference is enough to release it. We have to have the BOV or BPV, or we'll start hurting compressor bearings. You tune the BOV to give you the middle ground you chose. It will always be a compromise. This is why I prefer the BPV, it's less of a compromise.
I know how I drive. I'm either on it, it which case, it vents or driving like grandma, so it doesn't matter. In the in-between times when I could potentially be hurting the turbo, I'm willing to accept. It's never happening at high boost levels. I don't know the number perfectly, but full vent is about 13-15 psi and it starts to tickle the valve at maybe 8 psi of boost. I could probably bring it down a few psi, but in overall abuse to the turbo, I doubt it would make much of a difference.
I'm not telling you to do it. I'm just saying that's how I have done mine. If you don't want do it that way, then, by all means, do what works best for you.
Sponsored