Have a 91 sc
So I replaced the HG, selfported the heads and changed to headers and built a 2.5" dual to magnaflow resonator (more exhaust to be built). After that I started up and took it for a test run, found out that it was only pushing 8psi with stock pulley. Before I remember having like 10 psi, would this drop be coused by the little better flowing heads and the much better flowing exhaust?¨
Before I pulled it apart I ran a 10% overdrive on SC and pushed 13psi max, I removed that so that I dont run to lean beacuse of the heads and exhaust I now run.
I have always run 3" CAI. And no more mods than the one mentioned.
Thanks
So I replaced the HG, selfported the heads and changed to headers and built a 2.5" dual to magnaflow resonator (more exhaust to be built). After that I started up and took it for a test run, found out that it was only pushing 8psi with stock pulley. Before I remember having like 10 psi, would this drop be coused by the little better flowing heads and the much better flowing exhaust?¨
Before I pulled it apart I ran a 10% overdrive on SC and pushed 13psi max, I removed that so that I dont run to lean beacuse of the heads and exhaust I now run.
I have always run 3" CAI. And no more mods than the one mentioned.
Thanks