question about blow off valve

custommx3gtx · Post by **custommx3gtx** » April 11th, 2004, 10:19 pm

is it bad to run a bov with a maf?. if so why?

Marlon · Post by **Marlon** » April 11th, 2004, 11:11 pm

ya cause it;'s letting out air that has been seen by the maf already
your run rich
get a bypass valve

cjthor · Post by **cjthor** » April 12th, 2004, 12:23 am

OR get a super afc that can compensate for the lost air!

DavidOS · Post by **DavidOS** » April 12th, 2004, 1:06 am

cjthor knows best:)

apexi and greddy have good systems for that

Franko · Post by **Franko** » April 14th, 2004, 7:57 am

So I have an safc, this means that I can get one of those saucy blow off valves that make all kinds of noise?

babyblueMX3 · Post by **babyblueMX3** » April 14th, 2004, 10:58 am

Originally posted by Marlon:
ya cause it;'s letting out air that has been seen by the maf already
your run rich
get a bypass valve

that's why you place the bov before the vaf...in that order....compressor, bov, vaf, tb

I've seen MANY set-up like this on probetalk

marshmallow15 · Post by **marshmallow15** » April 14th, 2004, 2:28 pm

Originally posted by babyblueMX3:

Originally posted by Marlon:
ya cause it;'s letting out air that has been seen by the maf already
your run rich
get a bypass valve
that's why you place the bov before the vaf...in that order....compressor, bov, vaf, tb

I've seen MANY set-up like this on probetalk

wont the car have the risk of shutting off with that setup? since if the maf doesn't get an air reading (because of the vented air via bov), then won't it cause the engine to shut off, especially at idle?

JWMotorsports · Post by **JWMotorsports** » April 14th, 2004, 4:34 pm

I've been venting to the atmosphere for about 3 years now. It will be ok, it goes a little rich for a sec when it vents but if you close up the plug gap to around 32 and use a aftermarket coil (preferable an entire ignition system) it will burn off the excessive fuel and no harm done. I would recommend at least haveing a S-AFC though. P.S. I've been running 440cc injectors the whole time. Venting to the atmosphere hurts your performance a hair, but it was worth it for me just for the head turning noise! Shady can tell u....it TURNED heads!!! The power change is barely noticeable, like MAYBE a few hundreths of a second.

Shady469 · Post by **Shady469** » April 14th, 2004, 11:59 pm

hey jeremy! i took the one off of the WRX and put it on mine. its ALOT louder than the turboxs.
but back to the question; you do run rich but as cj said it can be compensated for.
jeremy and i both have the HKS BOV and they sound very nice, and do the job very well. jeremy your gonna need two here pretty soon aren't you? or a race one...
lemme know next time you might be in town. i might be going to eastside one friday before Nopi for a test run.

MX-3.com

question about blow off valve

question about blow off valve

Re: question about blow off valve

Re: question about blow off valve

Re: question about blow off valve

Re: question about blow off valve

Re: question about blow off valve

Re: question about blow off valve

Re: question about blow off valve

Re: question about blow off valve