any real gains with PRC stage 2.5 LS6 heads over the stage 1 ls6 heads?
02-22-2008, 07:19 PM
#1
any real gains with PRC stage 2.5 LS6 heads over the stage 1 ls6 heads? just wondering. i know the valve sizes are slightly larger but how much of a gain would i see over the stage 1 ls6 heads when combined with a big cam like maybe 240/242?
02-23-2008, 12:42 PM
#2
I have also asked this question and what I came up with was 3 cfm more at .3", 2 cfm at .4", 3 cfm at .5", 5 cfm at .6". However I have been told that because of the shorter intake runner of the 5.3 head it will make better power in the midrange and the 5.3 head will also give a better comp ratio.
With a cam that size it seems you are more for the upper rpms and the LS6 maybe better but others may have better info.
With a cam that size it seems you are more for the upper rpms and the LS6 maybe better but others may have better info.
02-23-2008, 05:16 PM
#3
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stage 1 LS6 vs. stage 2.5 LS6... i doubt that you'd feel anything in the SOTP.
think about it this way a 3 cfm gain at .600 lift is probably only going to be about a 1% gain in airflow... to me 1% gain isn't worth the money and effort to swap heads on a street car.
i've heard that a 4 cfm gain is equal to about 1 hp (basically)... just something to think about
think about it this way a 3 cfm gain at .600 lift is probably only going to be about a 1% gain in airflow... to me 1% gain isn't worth the money and effort to swap heads on a street car.
i've heard that a 4 cfm gain is equal to about 1 hp (basically)... just something to think about
Last edited by 2000TransAmWS6; 02-23-2008 at 05:25 PM.
