Aerochargers are better than a twin screw!! hahaha ;-)

[Greg Hermann]

At 5:37 PM 10/15/01, Jeff Meager wrote:
>And what about the losses that a turbo causes due to the horendous
>backpressures.....  you're not going to tell me turbo's are free horsepower
>are you???  The T88 on the 2.2L nissan engine I worked on that's putting out
>732hp at the wheels doesn't suffer the backpressure fate, but it also is not
>making any real boost until 5500rpm.....
>
>But a turbo that is on boost at 15psi, has on average, twice the exhaust
>backpressure, than boost pressure....
>
>LJ
>
Yes, a turbo makes more backpressure--but it DOES let the overall package
operate at a higher expansion ratio. A mechanically driven supercharger
does nothing for the engine's overall expansion ratio. Expansion ratio is
what makes HP.

Greg


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