Paxton Super charger

With my procharger I was a tad under 9 to 1 with aluminium heads but I was only at about 6 psi of boost and it ran good. It helped with the boost retard so I could help control the detonation issues.

How bad did it rattle?

I talked to paxton the said with a intercooler i could run 12psi with 9.0.1

Of course they did.....