Best location for BOV?

4463 Views 11 Replies 3 Participants Last post by Zerosoul, Nov 22, 2001

Discussion Starter · Nov 14, 2001

OK, I know this has question has come up a couple of times but no one has gave a good answer. Where is the best place to mount a BOV, closer to the turbo or closer to the throttle body? Does it depend on your turbo setup(sinlgle or stock twins)?

Save

1 - 12 of 12 Posts

Marcus Frost

· #2 · Nov 14, 2001

It doesn't depend on your turbo setup, it depends on your air measurement setup (MAF or MAP).

If you are running on a MAF, you want to have the BOV vent back into the intake, so you want to mount it so that it'll vent back into your intake.

For a MAP based car, you just want to make sure it's not mounted where you can get something stock in it (ie, where the front ducts for the brakes are)

-m

Save

Discussion Starter · #3 · Nov 14, 2001

The HKS SSBOV is atmospheric so it cannot vent back into the intake. I meant where is the best place to mount it on the IC piping.....

Save

Marcus Frost

· #4 · Nov 14, 2001

I didn't know you had the HKS SSBOV.

In the case of the HKS - functionality wise anywhere on the piping is fine, you may not want to expose it around the lower IC pipes for fear of something hitting it/clogging it.

If you want to hear it though, you can find somewhere on the lower IC pipes to mount it that will still be outside the engine bay, but still in a safe place to prevent any debris from getting to it.

-m

Save

Discussion Starter · #5 · Nov 14, 2001

So your are saying that it doen't make any difference in sound and performance by putting it anywhere.

Thanx.....

Save

Discussion Starter · #6 · Nov 14, 2001

Wait wait.... many of our cars are running the stock MAF system.... and what your saying is that the car will run incorrectly if we have a BOV to the atmosphere versus into the intake...

I know its that way on 240sx's (I had a turbo.. hehe) but since many manufacturers sell kits such as HKS and greddy that go out into the atm... whats the deal??

Save

RSA Supra

· #7 · Nov 14, 2001

The Supra might stall after doing a burnout or similar activity on an Auto, w/ a 6-speed putting it the clutch will take the load off the motor and likely eliminate the chance of stalling.

As far as the best placement for the BOV, theoretically, it should be as close to the Throttle plate as possible. The reasoning behind this is that when the throttle plate closes, it blocks airflow and starts to back it up into the turbo's (this is the whole reason you have a BOV in the first place) Having the BOV on/near the throttlebody will purge the air before it backs up against the throttleplate while largely keeping the rest of the Intercooler piping pressurized. This means that once you get back on it and the BOV closes, you will have more immediate boost response because you won't have to re-pressurize the whole IC and piping like you would if you let the pressure out before the IC.

That being said, it is unlikely that you will notice too much of a difference no matter where you place it.

See less See more

Save

Discussion Starter · #8 · Nov 14, 2001

hmm... question then... do any of us who have auto TT's have stalling problems with open air BOV's???

Save

Discussion Starter · #9 · Nov 14, 2001

RSA Supra said:
The Supra might stall after doing a burnout or similar activity on an Auto, w/ a 6-speed putting it the clutch will take the load off the motor and likely eliminate the chance of stalling.

As far as the best placement for the BOV, theoretically, it should be as close to the Throttle plate as possible. The reasoning behind this is that when the throttle plate closes, it blocks airflow and starts to back it up into the turbo's (this is the whole reason you have a BOV in the first place) Having the BOV on/near the throttlebody will purge the air before it backs up against the throttleplate while largely keeping the rest of the Intercooler piping pressurized. This means that once you get back on it and the BOV closes, you will have more immediate boost response because you won't have to re-pressurize the whole IC and piping like you would if you let the pressure out before the IC.

That being said, it is unlikely that you will notice too much of a difference no matter where you place it.

Now thats the answer I was looking for......

Thanx

Save

Discussion Starter · #10 · Nov 22, 2001

doesn't the hks ss bov have a supra kit in which it helps the problem of stalling?? like some how with the kit, it works with the MAF so you won't stall?

Save

Andi

· #11 · Nov 22, 2001

I've never had a problem with the location of my BOV:

It's also Loud as hell at this location......

Andi

P.S. the person who made that video does not know me. I just randomly found this video on the internet of me racing at TWS back in '00.

See less See more

Save

Discussion Starter · #12 · Nov 22, 2001

I mounted my just before the throttle body. seems to react more quickly than when I had it mounted near stock BOV location.
my friends Blitz BOV got moved to the turbo side and he can hardly hear it anymore.

Save

1 - 12 of 12 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

Top Contributors this Month