Mr URL
Member
- Joined
- May 24, 2001
- Messages
- 678
I shaved my heads to remove the old ring gaskets you can't get anymore and went to single shim gasket from RJC. Compression is about 9:1 give or take. I used to be able to shoot some 91 octane at 10 psi before the alchy came on. Seems like that's not an option now. But with 93 octane I can push 20 psi with a few degrees retard with a 91 octane chip! Only 15 degrees timing. So just confirming if running 9:1 or higher 91 octane is not an option anymore. It's more like 93 octane and alchy.
