placing the BOV on the hot pipe???

ASSISTANCE Forced Induction
1

I noticed that alot of stock silvias and supra’s run the BOV on the hot pipe. Whats the deal with that. I myself was thinking about doing so. would it alter performance with it being further from the TB???

2

My b/f and alot of the guys in his car club run Nissans and a few toyotas and I remember him saying one time that its better to have the BOV closer to the turbo. I never asked why but next time I see him I’ll ask him why… he could be wrong tho I don’t know. Just something I heard awhile back.

3

I’ve always heard that it’s better to have it close to the intake manifold. I’m sure there’s already discussions about this out. That’s what I’ve heard from alot of people, and that’s how I did mine.

4

if it is closer to the turbo, you are protecting the turbo from compressor surge… but that is only applicable to cars that are running HIGH HIGH boost levels. when you have it closer to the turbo you loose throttle response… so that is why some go with one on each side to get the best of both worlds. but again, compressor surge is only on race car applications if they are not running air-liquid.

5

I’ve been under the impression that the bov should be placed close to the t/b.
As soon as the t/b closed the bov should open and release the compressed air in the intake track, that would have normally cause the compressor to stop spinning or even spin backwards. But now that I think about it… it does not matter which side the bov is on…as long as it gets it’s signal [vaccume] from a accurate source… it should do the same job.

6

This topic could be argued for days but I think pubestripe nailed it on the head. Im planning on high levels of boost so I went with a full race setup, where the bov is attached to my backdoor intercooler, it works very well in this location. Its damn close to the turbo.

7

I always thought that it was suppose to be close to the throttle body as well but then I thought about the SR20’s. im thinking about throwing mine right outside of the cold pipe. Does anyone know if it makes a diffrent noise coming from the hot side.

i remember a 240 that had the greddy or hks on the hot side and it sounded totally diffrent. Not the whistling sound.