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The other thing to remember is that superchargers are linear power while turbos have a curved powerband.
What I mean by this is......a supercharger is driven off of the belt system turned by the crank. As the RPMs increase it spins the supercharger and builds the boost in a linear fashion. A turbo may have little to no effect on a car at say 1500 RPM even up to 3000-4000 RPM. Until you can get the turbine to spin fast enough from the hot exhaust gases it will not compress the air on the cold side enough to really give you a boosting effect. But once a turbo is spooled to lik 20,000-35,0000 RPM it will kick in and give crazy power.
So the effieiency of a turbo helps fuel economy when you are at low RPM since you aren't using higher air/fuel charts to compensate for all that boost. With a supercharger you have no choice, the RPM determines the boost and you really can't "get out of it"
I would say that superchargers are easier to bolt on and there may be less to maintain. But they will not make as much peak HP and TQ potential as a turbo setup can. So there are pros and cons to both. Superchargers can add a big whiny sound too (think 2003-4 Cobras) where a turbo will add a spool whistling sound (if that makes sense - listen next time you pass a mack truck they are all turbos)
Usually superchargers are much cheaper then turbos as well. The APS TT kit for the corvette is one of the most potent systems out there. It will make like 650-700 RWHP at peak but it is like 9k for the kit and then you need to install it too. Maggie chargers for the vette run like 6500-7500 and then install. But they will produce in the 500-600 rwd hp range depending on other mods and if you intercoor and meth inject it.
My advice is to learn and research research research. If you don't know what you are getting into then you probably shouldn't be boosting a car just yet. There isa wealth ok knowledge out there and all drivers like something different. Read up and see what you think would suit you and then see if you can test drive something with that setup
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