pitman86gt

i think im gonna go 10.5 to 1 can anyone tell me how much hp from stock i will gain and also good piston that will get me there with 60cc head.

FiveLiterRiceEater

if you want to run 87 then i would stay right at 9:1. if you have a 11:1 engine and try to run 87 its going to run like **** and ping.

YamahaBound

and what hp gains would be seen from going to 10.5 or 11?

hellas85stang

cast iron heads 10.5 is good with flat tops... aluminum allows a lil higher compression since its heat disipation is more..meaning gets rid of heat...so if you have 0.5 on cast iron and go to aluminum i have seen 11.0 11.5 some cases//on super unleaded//i have 10.5 on aluminum but i run 93 octane....if i use less its runs like crap... and i have seenrunningalot high compression on pump gas then 11.0 but usually you ned a certain combo set up..

FiveLiterRiceEater

its hard to say, it just depends on the set up. but usually higher compression engines will make more power.

myshifter

1 point id worth 2-3% more hp. The toyota prius runs 13:1 compression, its all in the camshaft guys

ron0410

He did not say he wants a s/c just answer his ? go high!!!

pitman86gt

i think im going to go with a small dome and that will get me to 11 to 1 or a little higher. probe makes one that is only like an 8cc dome so that wont be that bad. i was running 93 on my stock block. so i will run it with new setup

WLingle92lx

I have 12.0.1 and I run half VP 110 and Half 93 with 15* timing

JD1969

You guys all need realize that running more than 10.5 on 93 is a risk, how you get away with it is a well thought out combination with a cam that bleeds off some compression due more overlap. Keep it safe and stay under 10.5, you will only see maybe 10-15 hp by going to 11.5 anyways, so if it's a street drivin car that extra HP is not going to be missed.