On Sep 28, 2005, at 9:41 AM, ' ' wrote:

>
> <<A supercharger is geared to the engine's rotating parts, like a
> permanently mounted fan.
>  They are notoriously hard on engines,>>
>
> Not really.
> Depend's on what engine your sticing it on.

Also depends on the size of the blower and what you want to do with it.
You wouldn't put a drag racing blower on a street car, at least I
wouldn't chance it.
>
> Paxton has been bolting supercharger's on the front of engine for years
> with good results.
> You just can't overdrive the supercharger's beyond the engine's
> capabilities.
>
> <<Turbocharging is easier on engines but has a lag as the turbo spools
> up to speed.>>
>
> Yes and no.
>
> Kick up the boost a little too high, and you'll blow the crank out the
> bottom of the pan in no time.
> Melted piston's are a big bonus with a big push of intake .

This brings up a good point, don't add this stuff to an engine that
wasn't designed for it. On the vw 1.6 turbo (the only turbo motor I
have any direct experience with) the crank is induction hardened on one
throw, the block deck is thicker, the valves and valve seats harder,
the oil pump is 15% larger and the pistons are cooled from the bottom
by squirters. I went ahead and intercooled it too.
>
> Supercharging requires horsepower to function (but can be balanced out
> with the incresae of horses when it's doing it's thing), turbocharging
> is a freebee.

Another good point. Turbocharging may take a little bite out of
performance, though, as the fan itself is more restrictive than no fan
at all.
> It a by product product of the exhaust flow, but it's not a "right
> now",
> when you mash the pedal boost in power.

Jim
>
>