Exactly. If the MAF is left in the stock location and the BOV is a VTA type the car will be thinking it is getting more air than it really is (BOV is letting air out). This will generally cause running rich conditions between shifts and at idle because the car is compensating for air that is not there. In the worst case the car will stall.
Current Engine bay pics everyone
- Thread starter nautical2086
- Start date
- :
- 92 & 16 Meyatas
let me make certain i understand this correctly..so my maf is right after the filter before the inlet....the bov is a vta type and is on the outlet side of the turbo...sometimes when i come of the throttle real quick the idle goes down to almost o rpms, and then blips back upt to 750ish...would this set up correct this as well? thanks for indulging me!
Do you have a wideband in there as well? If you did and it was dipping real rich for a bit than I'd immediately say "yes, this will fix your problem". I don't know so much about this setup on an auto but I assume it'd be the same. What are you using for EMS, MPi right? Just have to be careful because relocating the MAF will require a re-tune.
- :
- 92 & 16 Meyatas
haha....In theory, I'd say "Shuah!". Then again, both of my cars are N/A, so I really should just stfu and gtfo
no mpi any more, went with the o2 clamp and begi rrfpr...it works awesome! ya, it goes pig rich for a bit then it settles back to 14.7 afr....
Yeah, I would say that rich dump is due to the VTA BOV - it's amazing though that it doesn't stall at all. Basically your MAF is reading x amount of air and then is telling to injectors to add y amount of fuel to maintain the proper AFR. With the VTA BOV some amount of x air is being vented therefore the y amount of fuel causes a run-rich condition. If the MAF were between the BOV and the TB the MAF would only measure the air that makes it past the BOV.
- :
- 92 & 16 Meyatas
so do i need to move the bov too?
I wouldn't think so. Just as long as it's on the pressure side and before the MAF you should be fine. Some people will say it should be on the cold side and yet other say it's better on the hot side because you're venting hot air but I really don't think it matters. You've already got it in place on the hot side, no reason to go hacking more things up 
- :
- 92 & 16 Meyatas
thanks for the feedback... i was somewhat confused by the bov location as it related to the maf...mine of course was different than every msp set up i saw...okay, so i need to takle a chunk out of my pipe.....another project!!!
flat_black
Member
Insomnia sucks. But here's my current engine bay, after a Stage 60^100 weight reduction. The head was milled so thin, it doesn't even look like it's there, anymore!
Arharhar, I'm so funny.
Arharhar, I'm so funny.
Mazdaspeed2oo35
600whp - 600wtq at 30 PSI
Sorry for the Thread Jacking but i need a sort of help in here from you guys..
im desperate looking for ACT Extreme Pressure Plate Part # MZ-018X does anybody knows from where i can buy one, i really need these Urgently. these is for a Mazdaspeed Protege or Mazda 626. any help would be highly appreciated !!!!
im desperate looking for ACT Extreme Pressure Plate Part # MZ-018X does anybody knows from where i can buy one, i really need these Urgently. these is for a Mazdaspeed Protege or Mazda 626. any help would be highly appreciated !!!!
Mazdaspeed2oo35
600whp - 600wtq at 30 PSI
Yeah, but only the Heavy Duty one, i need the Extreme .. heavy duty dont hold the HP im running. thats why im so desperate to find the extreme instead of the Heavy Duty !!!
