My 350 has 9:1 compression and I never run anything but 87 octane. Don't run anything higher than you absolutely need. Clint Hooper H&H Custom,owner 1969 El Camino ProTourer 2001 H-D FLHR custom bagger http://dalesplace.com/misc/friends/clint/clint_hooper.htm ----- Original Message ----- From: "John Nasta" <[EMAIL PROTECTED]>
> At what point do you guys go from running regular to mid-grade to premium > gas? My Olds had 10.5:1 compression and I was told to always run Premium, > and I always did. > I am looking at a 9.1:1 350 for my Malibu and am wondering if that would > require mid-grade or even premium to run nicely. Any guesstimates as to what > sort of HP I could get out of that with a decent aluminum intake and 600cfm > carb would be interesting to hear too. I have no idea what cam is in it, > whether it has been bored, what's been done to the heads, etc. I'm waiting > for more info from the seller. Just putting feelers out in the meantime. > Thanks
