colin

Anybody know what pressure the Apex blow off valve should open as I need to have it calibrated.
Please help !

colin

Any Info

DomFD3S

You can call Apexi now as they are still open right now. Speak w/ one of their tech guys.

Alpine

i have a stock fd with downpipe and catback, my apexi bov setting was fine the way it came with...
i have the bov kit for FD tho...

CantGoStraight

I don't think the blow off valve should open under pressure.....am I wrong in thinking it opens under vacuum ?????

Dragon

you would be correct sir...

colin

OK, what vacuum should it open then ?

colin

Any answers, thanks for your help.

kwikrx7

I've only driven one FD with a BOV (aftermarket) and it opened up in vacuum (pretty loud too) but I'm not sure what vacuum reading it was. My stock BOV opens up as soon as I let off the gas at WOT to shift (it's pretty loud too)

CantGoStraight

The more vacuum the more it opens, if it's adjustable you should be able to set it from soft (opens farther with lower vacuum) to hard (takes higher vacuum to open it farther. I'm not sure if this is what your looking for but it's my understanding of how these work (could be all wet here) the jest of it is it opens with vacuum to allow the boost pressure to vent (the woosh you hear) between gears or letting off throttle at high rpm.:o

Nike178

Colin, do urself a favor. Sell the apexi bov cause its garbage. Try HKS or Greddy

colin

Thanks for all your help.

kelrx7r1

nike 178 is it really that bad?
i know i had it for my fc turboII and it did give
me problems.what problem has it given to the fd owners?

Nike178

Well, i had it on my supra and after that experience, i wouldnt dare put in on my fd. It just leaked alot and on top of that, it sounded like ****. It just didnt perform well at all. I really liked the hks ssqv. Great sound and never caused one problem to me. Try it out

Chron

Well, i had two HKS SS BOV on my TO4 turbo since one couldn't handle the pressure, so i dunno if i would go back to it.