does anyone know how to tune for this? my buddy did it to his an stock it added an extra three pounds of boost. also spools up much quicker. i did it to mine but i am tuned so i don think it notices it

 

1st- you would probably have to say which or what can your talking about

 

I assume he's talking about the vac tank. This has been gone over a couple of times and someone even provided some dyno data that showed an increase of a couple of horsepower. I'm not touching it, though. It was engineered like this for a reason by someone smarter than I, so it's staying. I think if someone got a big gain out of this, it's because there was a leak to begin with.

 

Search "tank bypass". You'll find it.