In-House GTM Stage 2 SC Install\Tune

Originally Posted by Mike@GTM

The answer to that is simple...that much wtq requires more boost and therefore a smaller pulley. We normally ship our stage 2 kits with a 92mm pulley for areas with 93 octane pump gas and 96mm pulley for areas with 91 octane pump gas. That makes for a nice 500whp 93 octane pump gas setup that isn't overly aggressive. The key there is "not overly aggressive". Unless you plan on running race gas all the time, you don't want to run too much boost.

See, with a TT kit, you can adjust boost pretty much on the fly with a boost controller. So, that allows you to fill up with high octane fuel, crank up the boost and make more power (with an appropriate tune).

On a supercharger, you would have to swap pulleys when you change from one octane to another and switch your map. It's doable, but not everyone wants to crawl under their car every time they switch back and forth between pump gas and race gas.

The idea here, is to offer a supercharger that makes good power and like our Twin Turbo kit, has more in it.