BOV location?

nissan180 · #1 01-01-2005, 06:45 PM

Does it matter where I locate my blowoffvalve? Is there a better spot, a place for better performance or is there a place that is safer for the turbo. Let me know and why... I need to decide wether to buy a hot pipe with a BOV flange or not. If I'm going to put it closer to the throttle body than the turbo.

Thanks

AWDSR20 · #2 01-01-2005, 08:21 PM

Closer to the TURBO!!! u want to pressure to exit as fast as possible, so no back pressure is accumulated.

the back press will cause ur turbo to spin backward, then forward as u boost again. u want the least amount pressure behind the turbo.

monooxide · #3 01-01-2005, 08:48 PM

PUT THE BBOV in the TURBO itself problem solved..next problem im gonna be the problem solver...

AWDSR20 · #4 01-01-2005, 10:06 PM

yeah and put like 2000 shot NOS and neons lights in it too. SO COOOOL

LOL! monooxide!

want a supra · #5 01-01-2005, 10:10 PM

Quote:

Originally Posted by monooxide

PUT THE BBOV in the TURBO itself problem solved.

Can you do that? (half j/k)

TatII · #6 01-02-2005, 10:42 AM

your suppose to put it as close to the throttle as possible, so that as soon as the throttle closes, the boost will have less distance to travel to exit. however since our car's run on MAF's and its a bitch to recirculate the boost, its best to keep it as close to the MAF as possible. mine is right on the hot pipe at the compressor discharge on my turbo.

nissanfanatic · #7 01-02-2005, 11:15 AM

As close to the throttle body as possible. That is where the pressure wave begins. All the air being compressed is stopped when the throttle blade closes and begins to head the other way. With the BOV right there, it will just exit. That is where I have mine with a large hose going across the engine bay to recirculate. People have put the BOV everywhere on the intake piping, even on the intercooler, so its not gonna make a huge difference either way. You would probably be fine buying that hotpipe. Whats it flanged for? Tat didn't you have issues with a certian BOV?

logik23 · #8 01-02-2005, 12:22 PM

When you recirculate, do you still get then wicked ppppppssssssssshhhhhhhhhhhhhttttttttttt?

nissanfanatic · #9 01-02-2005, 12:28 PM

If you have a high flow filter. Its not half as loud, but you can still hear it. People are still

when they hear it.

Chuki_breath · #10 01-02-2005, 12:31 PM

what is better recirculate or dont? or does it really matter.

D-Bo · #11 01-02-2005, 12:33 PM

hahah i remember the first time i heard a blow off valve in person.. it was on a wrx.. i thought "oooohh that doesn't sound good" but then i figured out how turbos work and realized i didn't appreciate the sound i had heard..

nissanfanatic · #12 01-02-2005, 12:55 PM

I remember the first time I heard one. It was on a raddy looking 1st gen DSM. I knew the guy that owned it. I was walking to class and I saw him coming through the parking lot. He let off the gas to go over a speed bump and it sounded like air from an air compressor discharging. No whistle what-so-ever. I was like "Holy shit!" Then all these girls and douches behind me were like "That wasn't even a nice car,"

hahahahahaha.

The idea of recirculating is to keep the car from stalling out when you let off the gas. All the air you vent has been metered by the MAFS so the ECU is dumping fuel for that air. If you just vent to atmosphere, you get a really rich mixture which causes very-very loud backfires, stalling, ect. IF you recirculate, you aren't losing too much air. Another thing to watch for when you recirculate is to angle the vented air toward the compressor inlet as close to the compressor inlet as possible. Less double metering and such. An SAFC can solve this with the Dec air feature so you can vent to atmosphere.

AWDSR20 · #13 01-02-2005, 06:04 PM

thats why when i made a homemade cold air, the car stalled when i hit the clutsh.
good 2 know.

Importboom · #14 01-02-2005, 07:24 PM

wow i just doubled my knowledge reading this thread.

LaYzIeNoY · #15 01-02-2005, 10:01 PM

ya recirculating helps to stop stalling, i used the SAFC2 to solve that on my car, for the most part i've seen the BOV closer to the turbo and thats how it is on my car, but i don't think it matters that great of a deal

it some cars that i've heard you don't get the loud PSHH sound but you still here it, and on a few it had this swirling sound to iti thik their hose to the intake was rounded, overall it sounded pretty nice

what got me one time was that I was out at one of the local racing spots when this heavily tuned 3000gt VR-4 drove up and the wastegate went off, one of those loud ones that sound like all the air was released at once, and these ricers were like that doesn't sound right my friends car sounds better, i was thinking maybe if you knew more about cars you could appreciate it

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