I took the vette (427/390) out for a drive yesterday. I had filled the car with Non-Oxygenated fuel for the drive. Stepped on the accelerator and got severe pinging. I know some of you are running the 468/502's so what fuel do you use in these engines? Is your compression less than the older BB's?
My engine is not built. I has the standard 10:1 compression ratio. A little hotter cam than factory but not outlandish. The heads are stock with hardened valve seats in them. The timing is at (or should be) 6 degrees. I am looking at possibly buying some VP and adding an couple of gallons to each tank full to get the damn thing to run without pinging. Any help is appreciated.