Forge BOV or DIVERTER valve
- Thread starter lancebav
- Start date
well thats a subject to debate... MAF cars would and should run better while recirculating. theres no reason to run dual valves - no reason to vent atall
the maf reads a certain amount of air and tells the ecu how much fuel to send for it.
if you vent the air befor getting to the throttle body, the car will run rich inbetween shifts. i have a 50/50 sequential valve first returned then vented , when i was venting with it, i would have to tighten it down alot so it wouldnt stall from venting to much . and had some turkey still . so i just run it 100% returned , i can loosen the valve (like it should be) i have no turkey , and my car does not feel slugish after shifts anymore ,you can actually feel the turbo stay spooled.
there are some damn fast MSPs out there that are venting tho. some have engine managment and can compensate for some of it or have moved the MAF. the stock BPV is a peice of crap and doesnt do its job very good so you get surge/turkey with it.
and people add a second valve to help relief the surge . and its popular to vent this second valve (as long as the ecu sees some of the air it wont stall as bad) , but theres always gonna be some drivability issues with venting.
this will prob get me flamed and im sure about 20 people will follow this post with a bunch of " i vent my car and it runs fine" - but since they been making turbo cars with a MAF the general rule has ALWAYS been to return the air not vent it
the maf reads a certain amount of air and tells the ecu how much fuel to send for it.
if you vent the air befor getting to the throttle body, the car will run rich inbetween shifts. i have a 50/50 sequential valve first returned then vented , when i was venting with it, i would have to tighten it down alot so it wouldnt stall from venting to much . and had some turkey still . so i just run it 100% returned , i can loosen the valve (like it should be) i have no turkey , and my car does not feel slugish after shifts anymore ,you can actually feel the turbo stay spooled.
there are some damn fast MSPs out there that are venting tho. some have engine managment and can compensate for some of it or have moved the MAF. the stock BPV is a peice of crap and doesnt do its job very good so you get surge/turkey with it.
and people add a second valve to help relief the surge . and its popular to vent this second valve (as long as the ecu sees some of the air it wont stall as bad) , but theres always gonna be some drivability issues with venting.
this will prob get me flamed and im sure about 20 people will follow this post with a bunch of " i vent my car and it runs fine" - but since they been making turbo cars with a MAF the general rule has ALWAYS been to return the air not vent it
biochembruin
Member
which is the best bypass valve as far as flow rate/performance?
http://www.turbosmart.com.au/ i have the turbosmart dual port valve , like i said im not using the horn and i flanged it off , if i knew i wasnt going to use it i might of saved 50$ and just got there plumb back . but then again might be good to have the option incase i ever go to MAP sensor systemjaxmsp said:
