Guys boost is boost no matter if its from a supercharger or a turbo.... If another kit is putting down 450-500 @ 6-9psi thats what the stillen will do... the only differences that I know of is when the boost comes on... Turbo= for the most part all at once somewhere in the rpm band... Supercharger linear gains boost with rpm

There are other factors in there that effect efficiency but for the most part I think it will put the same HP down as the TT's that are out now as long as the psi is the same, peak HP should be the same. Torque will be different though....

This is not entirely true. Superchargers require work input from the engine
to spin. This extra work required by the supercharger does consume horsepower. As an example, a turbo at 6 psi might produce 450 whp whereas a supercharger at 6 psi might produce 430 whp.

The only way a supercharger would produce the same power at the same level of boost is to run it off of a completely isolated and powered motor, thus bypassing the horsepower robbing work required by a supercharger to work.

It also takes some horsepower to spin the turbo. There is no free lunch.

I fail to see this. The turbo requires no work from the engine to spin.

I'm just going to stop here before a supercharger vs turbo debate explodes.

Exactly, the back pressure put by the turbine on the engine "robs" horsepower too you know..

So if you turn the engine off does the turbo still spin?

For a short period of time, yes. The turbo impeller/turbine
wheel maintain some rotational velocity once the exhaust gases stop flowing. Obviously, once internal friction forces take over, the rotational velocity of the impeller/turbine decreases to zero.

Yes, turbos do add backpressure which can be seen to limit power output, but my point was the turbo requires no mechanical work from the actual engine to spin and produce power. The turbo simply works off of waste exhaust gas, and not the engine itself.

SSSHHHHh!!! lets not talk about exploding.:icon17:

dont the engines need back pressure? Thats why I thought turbos could go bigger diameter exhausts cuz the turbo itself provides the needed back pressure but NA cars have it provided by the exhaust itself.

The energy required to spin a compressor(turbo or supercharger) only comes from one place. That is from the engine itself. Superchargers take the power directly from the crankshaft.
Turbo's get their power indirectly from the extra work the pistons have to do, to force the exhaust past the turbo impeller.

Its only work for the engine at lower rpm, once the turbo spools up beyond inertial forces then any power loss essentially dissapears.

Unfortunatly in the case of a supercharger the faster it spins, the more power it takes to drive the supercharger.

Turbo's don't spin themselves,even after spool up.

What did I start :wtf2:

LOL...LiquidZ had a logical explanation imo but my opinion isn't worth a whole lot lol...

Can't wait to see pics and #'s Kyle!!! I threw up a little earlier with the 90-120 days comment lol :roflpuke2: Looking forward to any new updates!

LOOOL I like what you did there, very smart.

You know I wasn't referring to the interial energy stored in the turbo due it being a rotating mass.

I was just saying, to get the turbine spinning, the pistons have to put extra effort to push the exhaust gasses through it. That extra effort would be "robbed" from the engine's total bhp. Where else would the energy come from?