Quote Originally Posted by sleepinIS5
how the hell are you runnin 18psi on a s/c? what kind of s/c is it?

The only one of it's kind on an IS. It's a big ass Rotrex blower, the C38.

It'll pop 21 psi if I push the revs... and I have a 5mm smaller pulley sitting in the garage waiting for it's turn.

Of course, I'll have to run the meth in high RPMs if I install the smaller pulley... it will push almost 25 psi according to the calculations. I can get away with it since it's an s/c... not a turbo. 20+ psi on pump gas with a turbo is a big no no.