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tgreenz400
12-09-2007, 12:49 PM
Well i plan on bumping my 400 up to a 426 or 440...the only problem that i see is that i think the stock compression is 11:1 but i think most pistons are high compression which is like a 12:3 or some thing like that...does that require race gas?
cataway
12-09-2007, 04:19 PM
race gas , no, but you should use 93 pump gas
tgreenz400
12-09-2007, 05:11 PM
Originally posted by cataway
race gas , no, but you should use 93 pump gas k thanks
TheNewn
12-10-2007, 03:45 AM
Look into the Athena 434 kit.
bloodmoney23
12-10-2007, 07:10 PM
Originally posted by tgreenz400
Well i plan on bumping my 400 up to a 426 or 440...the only problem that i see is that i think the stock compression is 11:1 but i think most pistons are high compression which is like a 12:3 or some thing like that...does that require race gas?

if stock is 11:1 then at 13:1 you would want to start running race fuel. 12:3, would be the same as saying 4:1 which would be a low compression piston. but any piston you buy up to 13:1 just run 92 or 93 octane whichever your local carries. 13:1 up to 13.5:1 you could get away with 93 with octance booster. anything above 13.5:1 you will def need race fuel.