440 Compresion

[nickt5174]

If I get a 440 kit with 11:1 compresion on a bone stock 400ex would I be able to run pump gas or would I have to run race gas?

[440exnacsracer]

premium gas would be OK, but off-road high octane fuel or race fuel would be better. at some stations ive been to, they actually sold off road gasoline with110 octane... run at least 93 octane

[oynot400]

From what I have been told, 11:1 is the limit for pump gas. However, when you start getting to that limit you may run into some pre-ignition. You will just have to run it to see what it does. If anything you can run a 50/50 mix race gas and pump gas.

[papaw]

check out "have you decked the cylinder"post's,you might find it pretty interesting about 440 compression ratio's.......