VTredneckgames
10-07-2009, 09:00 AM
I have heard so much differences in opinions on this matter.
Id like to end it and get the facts.
2004 400ex, 86mm bore, stock exhaust (ground welds), openish air lid (outerwear lid mod)
First off, With a stock cam, will a 11 to 1 piston be okay? I know the stock cam will have a higher dynamic compression. Im running the cometic base and mls head gasket so that should drop the static compression to 10.2:1 right? So I think I should be fine.
Second, I have a timing key, but not installed. If I do the above, would you recommend installing it? I know it will create more heat, I have a spal fan, and will be getting air scoops next spring. I know the website says dont do with high compression, but from this site, most people say they mean high as in 12:1 and higher.
Thanks, just want to get this settled.
Id like to end it and get the facts.
2004 400ex, 86mm bore, stock exhaust (ground welds), openish air lid (outerwear lid mod)
First off, With a stock cam, will a 11 to 1 piston be okay? I know the stock cam will have a higher dynamic compression. Im running the cometic base and mls head gasket so that should drop the static compression to 10.2:1 right? So I think I should be fine.
Second, I have a timing key, but not installed. If I do the above, would you recommend installing it? I know it will create more heat, I have a spal fan, and will be getting air scoops next spring. I know the website says dont do with high compression, but from this site, most people say they mean high as in 12:1 and higher.
Thanks, just want to get this settled.