Stillen Air to Air setup

victorofhavoc

I think he was referring to something like the synchronic diverter valve, which actually open at vacuum so that air can have a shorter route for greater response. Genius actually, but for a supercharger i don't see the use. The annoying lag and slow response of a turbo I get though...

the only time you'd want recirc is to keep your car from leaning out too much when not on boost. Pre-intercooler, post, or even on it I don't see as making that much of a difference, except for maybe putting it post to make sure your pressure drop across the intercooler isn't as much of a factor in tuning...or at least that's what was explained to me before.

At 20 psi 1" diameter means there's 15.7 pounds of pressure on the valve, and at 1.5" there's 35.33 pounds. 1" and 11 lb spring is 14.013 psi. 1.5" and 11 lb spring is 6.227 psi. So when do you want it to vent is the question?

EDIT: This is all provided i didn't jack up my math somewhere...I've been paged out for work twice in the middle of the night this week so my math may not be trustworthy until the weekend

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Had a 2010 WRX- boy was it quick in a straight line, got a 2014 Z- man is she grippy in the corners-- then left the Z and later got a GTI, now back in an 09 racecar Z!

silencedeyes

Aaron, youre thinking in terms of turbo. Yes a bov is similar to a bypass valve. But you need a smaller spring pressure to allow equalization of air pre and post s/c at off boost situations (cruise and idle) or you'll get cavitation.

Another thing with your air to air setup, be careful of psi drop across the board with the core and all that piping. Remember you s/c wont compensate for it like a waste gated turbo will (or well mask it to some degree). You say 14psi is that at the compressor? If it is, it will be less at the manifold. IMO, I would run a smaller pulley to compensate for the psi drop and a waste gate ( on the charge pipe) to control the amount of "boost" you want.

Check out this link for your bypass valve. http://tialsport.com/index.php/tial-...vs/47-tialbvqr