A lot! This all depends on the type and size of the supercharger.
At boost levels of 7psi you can expect around a 40-45% increase in HP. At 15psi you can expect around 100% increase in HP. HP really depends on boost levels and existing engine HP.
That depends on how big the supercharger is. -it is 7.0 psi-
69
figure 525 or a little more with a supercharger.
around about 15 to 17 horsepower
I have a 1999 with the 3800 engine. The owner's manual says the horsepower is 205 without the supercharger and 240 with the supercharger.
About 40, it boost it to 200 HP. The supercharger kit from scion come with bigger fule injectors as well as a rage CPU to produce more power. It also has a warranty Wich most superchargers do not have because they easily break.
The electric supercharger is supposed increase horsepower by the fact that it pumps compressed air to your engine making a real increase in horsepower unlike others.
about 135 hp i have an 07 gt that has a roush stage 3 supercharger on it and i have about 410 to the wheels so about 455-460 hp.
65 - well over 300 depending on boost
About 80 HP over stock.
Horsepower TV - 2006 Supercharger vs- Turbocharger was released on: USA: March 2011
In your 5.7 the best horsepower option would be to supercharge it. They current make a supercharger for the 5.7l hemi if that's the engine you are talking about. Intake and exhaust do produce more power, but however change the overall torque bands v Horsepower bands, therefore you may loose some horsepower in some rpms and gain some in others. Therefore a turbo charger or Supercharger will be the best money spent for more horsepower!