Thread: Vac source for BOV on Twincharged setup

So...kind of a unique question, but I'm installing a BOV on my Twincharged setup due that car now having a Getrag 284 transmission setup.

Here is a pic of the engine bay:


I don't know if I should pull from before or after the supercharger. The BOV will be going on that charge pipe after the turbocharger.

I run my BOV line just after the TB. Vacuum is vacuum. For your setup I'd just run a vacuum block and call it done though. It simplifies things.

Why no intercooler on the turbo?

Cuz intercooler under blower

y u no twin intercool on twin charge?

how much whp are you putting out??

Originally Posted by txslow6

I run my BOV line just after the TB. Vacuum is vacuum. For your setup I'd just run a vacuum block and call it done though. It simplifies things.

Ok, I'll just pull it from the blower vac tree.

Originally Posted by dsmuts

y u no twin intercool on twin charge?

Not needed.

Originally Posted by mwinters29

how much whp are you putting out??

Not sure. Tuning/dyno session on Wednesday (hopefully). I only have a ST2 cam and stock heads, so I'm not aiming too high. I'd be happy with 450whp, but 500 would be nice. Someday I'll swap out the heads and cam for something more potent and break that 500 mark.

nice man. someday in the far future i want to do an L67 build with the twin turbos. im hoping to break the 700whp mark. but thats farrrrrrrr in the future lol

Originally Posted by ls1camino

Not sure. Tuning/dyno session on Wednesday (hopefully). I only have a ST2 cam and stock heads, so I'm not aiming too high. I'd be happy with 450whp, but 500 would be nice. Someday I'll swap out the heads and cam for something more potent and break that 500 mark.

Nice post up how much it makes. What's all done to the engine minus the ST2 and T67?

Originally Posted by txslow6

Nice post up how much it makes. What's all done to the engine minus the ST2 and T67?

It's a L32, but that is just for the stronger rods. Other than the cam, it has 105# springs and 60# injectors. The blower is stock, the TB is stock, etc. Other than the Twincharge Kit and Intercooler, it's a lot of high boost on a stock motor.

Like I said, somewhere down the road, I'll port the Blower/TB/LIM/Heads, put in a ST5 cam and 130# springs, and crank the boost up to 20psi. Meth Injection may be needed at that point, but I'm ok with adding that too.

I connected above the supercharger from the vac tree that feeds the brake booster and BBV (blue line in the pic). I figured anything close to the TB would get vac quick as the TB closed, but it would probably be just as fast under the supercharger.