11 to 1 on pump gas

JoeDust451 said
Not on pump gas it won't

Yep, 5 years of hard abuse and when I tore it down no signs of detonation.

65Vsignet said
I run over 11.1 on pump gas! iron headed 360, at sea level in the heat no problem and i only get 91 octane california crap fuel.

Thank you.

dodge freak said
You know, just cause you might not hear the motor knocking, doesn't mean it isn't

Forged pistons can withstand some abuse

I got a feeling those with high compression and 91 octane gas also have a very loud exhaust. Muffler it down so you can lightly speak and be heard and then see if you can't hear the motor rattling at times

True about hearing it. By the time you are hearing it, its very severe. My car is really quiet and I read my plugs to look for detonation. Also if it detonates you can see the BSFC go up on the dyno.

greymouser7 said
The people claiming higher compression useage near the ocean do not have Houston heat or constant humidity. California, Oregon, and Maine do not have Houston humidity. (Even the Oregon rains are not the same...the heat in Houston slaps you in the face immediately after sunrise with instant sauna in June, July, August, and September.

You are right atmospheric conditions affect how much you can run, but you have much better gas than Ca does.

greymouser7 said
- Location: St. Helens Oregon

BTW I am in SoCal not Oregon.

65Vsignet said
My 360 has 10.6:1 static compression and cranks 195-205 psi and runs fine on 89 octane. I have tried 87 but I need to be careful. even on 100+ degree days it runs fine on 89. - Location: Pembroke, MA

My car has been in 100 degree heat too and runs on 91 no problem. I even raced it at Vegas at the MATS with a 150 shot on 91 octane and no detonation.