I think the LS2 won't be as good to boost as the LS1 because of the added C/R. 10.9 is really high to give it boost. I think the max boost would be 4-5psi on such a C/R on pump gas. So pistons and rods will be needed with any boosted LS2 to make some serious power or just LS2 heads will larger chambers to lower the C/R or just thicker head gaskets. Im sure 5psi on a LS2 would equal 7psi on a LS1 due to the higher C/R and better flowing heads, intake manifold and TB. I know people went up to 10psi on stock C/R and pump gas on a LS1. So im sure people will also push the LS2 to the limits to see how much boost it can take without detonation. Its going to be intresting to compare a 04 GTO with a magnacharger against an 05 GTO with a magnacharger both pushed to the max boost they can take on pump gas.