Quote:
Originally Posted by enkeivette
Ya, exactly, it's an entirely different animal. I think for an old style roots setup you need like 8:1 compression to get up to around 8 or 10 lbs of boost.
With an old style roots and 10.5:1 you'd be better off not running it. You'd start to melt pistons with a few lbs because of the heat.
Newer LS motors with liquid cooled roots blowers have better flow, better control over the engine, and the blowers run cooler. I think a lot of those Magnacharger guys run pretty decent boost with stock LS compression. Different animal.
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Ya if your not gonna intercool it then you have to lower the compression.