at the same boost presure sure you will make more power with better heads but heads are expensive and turning the **** costs less

one good debate would be max power on a given fuel. 91 octane in this case. can you make more power by running better heads(tuning to the limit of the fuel). lets say you make 500hp at 10psi tuned to the limit of 91. then add good heads and now you can make 500hp at 8psi, will you be able to still turn it up to 10psi and now make 550hp at 10psi or will it start to knock at lets say 9psi. will it knock at the same hp level or the same boost level? i suspect that it would be somewhere in the middle, a little more hp, a little less boost. i know lower boost should be lower intake temps if the turbo isn't near its limit but does knock have more to do with iat's or cylinder presure?

one thing i am pretty sure about is the heads will reduce most peoples max hp potential. with these large motors we have, flowing more air at at less presure usualy pushes you off the side of the map and ends up giving you less max hp. with twin 60's this wont be much of an issue but for someone running something like a single 76 steping up to better heads might actualy reduce your hp if your all ready running near the limit of the turbo.

 

Very interesting Jim. So... I may run a bigger turbo in the not too distant future. Have my cake and eat it too. For now though, I'm so damn thankful just to have my truck back. Missed it bad!