Originally Posted By: mshaw230
Originally Posted By: TJ's Chevy
anything above 10.0.1 you'll want to run 92. Even at 9.5.1 I'd be running 92.


I'd been running premium in the ill conceived notion that it has less ethanol. But everything except gas tank gaskets upgraded, so it's not an issue anymore.

I'll have about 9.25:1 with the flat tops, so barring trial and error differencs, it sounds like mid grade minimum, maybe premium. The guys who wok with the old Chevy engines keep on the virtue of stock. Regular gas is one reason. But to them i say MORE POWER! :-)

But the more aggressive CAM (same as gbauer) will affect it too, but don't understand affect yet.

Thanks,
Mark


I have stock compression and have no pinging at all with my cam running 87.

You're not all that much higher than me so you might be on that edge where you can sneak by on 87.