drmini in aust wrote:
Turbos spin up to around 100,000 rpm usually, good luck driving it that fast with a belt...
Centrifugal superchargers spin much slower, they are designed for belt drive and their scrolls are way bigger, they are not just converted turbos.
I was hoping someone would bring this up
The whole design of the impeller is completely different because of the lower rpm.
And I'm tired of hearing all about the 'drain of power' from a belt driven supercharger... anyone who says that turbos don't suck power from the engine are kidding themselves. Here's a quote of mine from another forum ---
Quote:
A supercharger loses power from having to be directly driven from a pulley type system off the engine. It takes power to make power, but the supercharger makes so much more power than it takes that you never notice it.
A turbo also robs power from the engine in the form of back-pressure. If someone tells you that a turbo doesn't use any energy from the engine, slap them
because they're full of crap as it goes against the laws of physics! But like a supercharger, when the turbo hits boost it makes more power than the it takes. But until it does, you feel the power loss through 'lag', simple right?
If you had to choose which uses less power, that would be a turbo system which is why they make more horsepower per psi when compared to a supercharger.
There's probably a few technical errors in that logic, but you get the idea
