[JL8Jeff]

It depends on how much boost/power you want to make and how much you want to spend. I believe the Magnacharger is a roots style supercharger that fits the LS1 engine. I'm not sure what the limit is on an LS1 engine regarding boost on the stock internals but the LT1 is around 6-8 lbs of boost before the piston ringlands will let go. The turbo should have the better top end potential but might sacrifice bottom end. The supercharger whine is something you love or hate. I ran the Powerdyne 4.5 lb supercharger on my old 93 for almost 5 years and never had any problems and it was a blast to drive. And that only added 80-100 hp. So are you looking to add 150-300 hp and were you planning on building the engine specifically for boost? As for the STS rear mount turbo, the Two Guys Garage show installed one on an LS1 Camaro and dyno'd before and after and picked up some solid numbers at the rear wheels. No melted pistons either.