Re: Need Help Diagnosing Popping
I didn't have enough time last night. All I was able to do was a cold compression test. And all the holes pumped up to 175-180. I pulled the valve cover too and the rockers were pretty loose. I can't imagine a valve being held open at all.
Bill, if I can find a helper I'll try running the rpm up and seeing if theres still popping
67 Chevelle 454, M21
Gen IV 454 (out of C30 ), 390 heads 1.88/2.19 valves by Vortecpro, with ISKY Hyd Roller cam (at 050 218 int./228 exh, lift 530 int./552 exh.), RPM performer intake, Fitech 600HP, Dougs headers, and M21, Gear Vendors OD, 3.73's, UMI Suspension, Viking coilovers.