thx
Open bov
-
float_6969
- Moderator
- Posts: 17366
- Joined: Mon Aug 26, 2002 1:55 pm
- Car: CA18DET swapped 1995 Nissan 240sx (too many mods to list)
2015 SV Leaf w/QC & Bose (daily) - Location: Topeka, Kansas
- Contact:
If you're still running the MAF, you will run rich at times, as the air you expend has already been measured for a set amount of fuel. You may experience stumbling in between shifts, a low or erratic idle with an occasional stall, or nothing at all. All cars are different and take the dump in their own way.
I would crush the DSM bov to ensure that it does not leak at idle. Bumping up the idle a bit would ameliorate some idle problems, same with an adjustment in shifting/footwork.
I would crush the DSM bov to ensure that it does not leak at idle. Bumping up the idle a bit would ameliorate some idle problems, same with an adjustment in shifting/footwork.
alot of times, people will change their maf setup to blow through.The maf reeads air entering the turbo, and calcualtes the fuel needed to compensate for all that air. So when you shift, the air is realeased, but already has been metered by the maf. All of that fuel is still begin injected into the motor. SO by running a blow through maf, you can more accurately measure the air entering the motor, and take car of that rich situation. Therefore--loud sso sexy BOV sound--and no more poppinh, and richness. You get that blackness on teh back bumper over the muffler yet? If not--you will when you put an exhuats on it.
-Josh
-Josh
When you say blow though, do you mean the maf on the intercooler piping as opposed to turbo intake? Someone was arguing how that doesnt do anything and i still dont think im too sure on how it would change it, because any air that goes through the IC piping, has to come in through the front of the turbo/maf.
it doesnt really "change" it, and it doesnt make any power--well none that anyone has proven.All it does when moved to the i.c piping no closer than any bend 6 inches close--and 8 inches fromt eh TB, is measure th air entering the motor rather than entering the turbo. When the air eneters the turbo-it passes throught the maf (ex 10lbs of air)that calcs teh fuel mixture(x amount of fuel). when you blow off, the air escapes into the atmosphere(now only 2 lbs remainthe other 8lbs got blown off into the atmos.)-but the fuel that was calced to be injected still gets into the moto( all x amount of it) which equals too much fuel not enough air(remember--its blown off now) this makes the car rich and backfire between shifts. I have seen it smooth cars out that run open atmoshperic blow off valves, but not mafs like the effect. most just do fine, and you can continue to run open BOV with no ill effects.This isnt really a performance gain, just to be able to run open BOV for sound. SOme say its more accurate because it actually reads the air going into the motor rather than into the turbo--make sense to me--ill be switching my ka over to it shortly.
a blow thru maf is placed after the IC before the throttle body.
you place the BOV between the compressor and the IC.
when the BOV vents, the escaping air hasent been metered, so the car will run correctly.
it doesnt gain power, its just so that you can run an open BOV without dumping metered air. constantly dumping metered air will cause carbon buildup and foul plugs ect...
you place the BOV between the compressor and the IC.
when the BOV vents, the escaping air hasent been metered, so the car will run correctly.
it doesnt gain power, its just so that you can run an open BOV without dumping metered air. constantly dumping metered air will cause carbon buildup and foul plugs ect...