Engine/Transmission (1998.5 - 2002) STD vs HO Comprssion Ratio

[bluthndr]

Is there a difference with the compression ratio between these two 24v engines? If so, would it be worth swapping from a std to an ho??? I'm thinking probably not, but know a guy who wants to... With all the mads available for these, would there even be any difference when you got to the 600-700hp range??

 

[Snow man]

The differences are small,but the ho does have more. Anyone building a big Hp HO will usually run a thicker head gasket off a 12V to lower the compression a little. At 600-700hp,the Std engine usually makes a little more HP than the HO,on the order of 10-30hp. There arent any 24vs that are running over 650HP with the VP44 pump,unless there using drugs,or correction factors ,and dynoing at altitude to get there.

 

[Thomas]

This page at the great Dave Fritz site has some specifications, including compression ratios, for both the ETC and the ETH.