The "lag" as some people call it is a normal operation of the turbo as
it has to "spool up". However, with the proper turbo and compressor,
the lag has no more than 1 second delay.
Yes, a centrifugal supercharger doesn't have any lag (in the
conventional thinking)...but does suffer on power as the boost increases
as rpm's increase. With a turbo, you stomp the pedal to the floor and
you've got 7-9# boost (1500, 2500, 3000, or 5000rpm...ya got boost).
This effectively puts the turbo ahead of the supercharger. Then,
there's the screw-type superchargers (roots as well) which do build
boost instantly...but at a loss of HP from the belt drive.
- Bernd
-----Original Message-----
From: owner-dakota-truck@dakota-truck.net
[mailto:owner-dakota-truck@dakota-truck.net] On Behalf Of Jon N.
Benignus
Sent: Sunday, June 09, 2002 5:54 PM
To: dakota-truck@dakota-truck.net;
dakota-truck-moderator@bent.twistedbits.net
Subject: Re: DML: turbo ?? couple of questions...
> what exactly does a turbo charger do?? are there oem or aftermarket
> turbos i can get for my truck.... are they really worth it ??
A turbo uses exhaust gases via an impeller to compress the intake charge
and force it into the cylinder at higher than atmospheric pressure. Yes,
there are aftermarket turbos out there, but it is probably better and
easier to go with a supercharger. The diff between the two? Turbos are
exhaust driven, and have a "lag" before the impeller has enough exhaust
flow to create full boost. Superchargers are belt driven, and have no
"lag". Both will require some internal mods to the engine. Bernd is our
resident expert on the subject. He'll probably chime in and say more in
two sentences than I could say in two pages. HTH
Jon
STL MO
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