[a10secstreetcar]

SF Peeps,


I have read a few threads and haven't gotten a definitive answer.


Is it better to mount BOV on hotside or coldside on charge pipe?
(I read that it's better to mount closer to the throttle body)

I'm about to be installing my APU setup and would like to make sure it's done correctly.


Kyle

 

[FLINTSTONESKID]

its not really a huge difference, but if you want to get technical, the best placement would be as close to the throttle plate as possible.

 

[a10secstreetcar]

its not really a huge difference, but if you want to get technical, the best placement would be as close to the throttle plate as possible.

Thank you sir! That's my understanding as well.

 

[FLINTSTONESKID]

sure thing, also, depending on the boost levels you are planning on running, you might want to consider one on each side.

 

[Flicktitty]

i have mine on the "hot side" seems to work fine. i'd like to relocate it sometime...

 

[FLINTSTONESKID]

^^^there is no real reason to relocated it if its already installed, its just one of those things that, if you havent already installed it, it would be best on the cold side. it really wont hurt anything, especially at lower boost levels, say, under 20psi. and if you are over that, as i said previously, one on each side is a good practice.

 

[Flicktitty]

^^^there is no real reason to relocated it if its already installed, its just one of those things that, if you havent already installed it, it would be best on the cold side. it really wont hurt anything, especially at lower boost levels, say, under 20psi. and if you are over that, as i said previously, one on each side is a good practice.

i understand that completely. i just think i'm going to relocate it to someplace else to look better, that's all

 

[trbstng92]

or just dont run one at all. But seriously unless you are relocating it yourself, its not worth the money to have it moved

 

[RikTT]

Either OR
Some will say hotside location to help with compressor surge "saving the turbo" and the other benefit, not blow off post Intercooled air (My location)

 

[Ryeno]

Either OR
Some will say hotside location to help with compressor surge "saving the turbo" and the other benefit, not blow off post Intercooled air (My location)

no the tb plate is where the reversal of airflow starts. by having it at the turbo the whole intake system from the tb through the intercooler and the hotside pipe will have air traveling in the wrong direction.

 

[a10secstreetcar]

^^^there is no real reason to relocated it if its already installed, its just one of those things that, if you havent already installed it, it would be best on the cold side. it really wont hurt anything, especially at lower boost levels, say, under 20psi. and if you are over that, as i said previously, one on each side is a good practice.

I will definitely be running over 20 lbs. Good information in the thread, keep it coming guys.

 

[figgie]

no the tb plate is where the reversal of airflow starts. by having it at the turbo the whole intake system from the tb through the intercooler and the hotside pipe will have air traveling in the wrong direction.

we have a winner!

 

[Beau]

If you're running an HKS SSQV they are great valves, but with a medium to large single with a large intercooler and 3 inch piping, there will be too much volume for one valve to take care of. If you like that bpppf bpppf bpfff pffff pfff sound then go with one valve. If you want your turbo to last, go with two valves

 

[Spare-rib]

If you're running an HKS SSQV they are great valves, but with a medium to large single with a large intercooler and 3 inch piping, there will be too much volume for one valve to take care of. If you like that bpppf bpppf bpfff pffff pfff sound then go with one valve. If you want your turbo to last, go with two valves

This is exactly a problem I'm suffering from right now. I have one SSQV3 near the TB (to be precise on the location where the TC butterfly valve used to be) but it cannot handle it at all. Tried to replace it with an old SSQV1 (these are still adjustable, set it to soft) the problem got slightly less but still very noticeable.
I'm now planning on a second flange near the turbo and put the second SSQV there. Hopefully that will fix the "bpppf bpppf bpfff pffff pfff" issue and save the turbo as well

(This is with a PT67 @ 21psi and large FMIC)

 

[RikTT]

no the tb plate is where the reversal of airflow starts. by having it at the turbo the whole intake system from the tb through the intercooler and the hotside pipe will have air traveling in the wrong direction.

Once that bov opens upon throttle plate closing, the job gets done regardless of airflow direction and not backing up the charged system (if placed closer to the turbo, concensus). I agree a closer bov to the TB plate may relieve quicker.

 

[Beau]

Rik, the pressure wave starts from the TB, remember all of that air has momentum, and a LOT of it too. So keeping it by the TB means the air doesn't have to change direction to go back out of the BOV, you'll get a more continuous stream of steady pressure.