Hey, your doubts are fully justified... especially if you haven't read up on it... But don't get me wrong; I'm not saying that it WILL, or that I expect it too... All I'm saying is that to me, it seems like if you're putting on a part that says "creates X psi" you'd be silly not to prepare for X psi... even if there IS a good chance it may not. Preparing for best/worst case scenario! And hunter, I really appreciate your info on the other thread... that makes 2 people I've heard say up to 2 psi is ok on 'bout any car... I'd be really happy with any noticeable performance gain, and I DO realize it may be minimal... I expect something, though. The times I took with the 6 volt fan showed a 3/4 second increse. After my snow tires, my time had dropped about a third of a second (0-60mph, same place I always test.) and the small fan setup got me times 1/2 a second better than EVER! So... I DO expect a gain proportionate to the extra voltage... or quite possibly more, due to a more efficient design. If it DOES exceed even 1 or 1 1/2 psi... that'd be FREAKIN' COOL!!! It's been a FUN project, and it's all about trying something different! I'll keep ya posted! Fiberglass resin layer 1 drying now...