I suspect this valve is broken in my car, because the AC vents close as soon as I have even minimal boost. Before Memphis, I did not have time to bother with such a trivial item and since Memphis, I don't have the motivationto work on it! What is inside of the vacuum tank? is there anything mechanical in there to keep the vacuum consistent? or is it just a empty tank?? Mine is no longer in the pontoon (the intercooler is there now!) so I don't have a lot of space for a larger one. How critical is a small increase in size for vacuum reserve? > -----Original Message----- > From: Stragand, Dave [mailto:dave.stragand@xxxx] > Sent: Tuesday, August 13, 2002 9:58 AM > To: DMC News (E-mail) > Subject: [DML] Re: Vacuum Source For Turbo Cars > <SNIP> > If you're > still having problems, check out the anti-reverse valve > leading from the manifold to the vacuum canister in the > pontoon. It should only "allow vacuum" one way. (If memory > serves, it's black on one side, white on the other, and about > the size of 5 or 6 half-dollar coins stacked together. You > can also simply use a larger vacuum tank out of just about > anything in a salvage yard. It's hidden deep in the pontoon > anyway, so what it looks like doesn't matter. <SNIP>