ThunderDave
Registered User
I bought a 91 super coupe back in July and until now, I thought the car ran like it was supposed to. The boost gauge read 8-9psi at the maximum boost. I added a 5% overdrive pulley and the maximum boost rose to 14-15psi. I've been told since then by other sc owners that I should have had 14-15psi to begin with, before the 5% pulley was added. Is this correct and if so, what could be the problem with not having that much boost before. Any help would be very much appreciated.
David
David