[Vwdiesel] Turbo vs. Non-turbo [was My TURBO test (more scientific)]

[Gerry Wolfe]

----- Original Message -----
From: <LBaird119 at aol.com>
To: <vwdiesel at audifans.com>
Sent: Friday, April 11, 2003 1:44 AM
Subject: Re: [Vwdiesel] Turbo vs. Non-turbo [was My TURBO test (more
scientific)]


<big snip>
  Torque vs HP:
  Put very simply, torque is, as said a measure of the amount of "push"
the pistons exert at a given moment.  HP is a combination of torque
plus rotating mass.  Raise the rpm, raise the hp on the same engine,
with no changes.  Put on a heavier flywheel and you stand a good
chance of raising the hp rating as well.  ;-)
</big snip> (this is a new html command...)

Actually, torque would be the amount of twist at the wheel, after the
up-and-down movements have been converted to circular ones... there is loss
in the conversion (a picky/trivial difference).
However, horsepower is a function of torque x rpm (I think you multiply the
two and divide by 88000 or some other arbitrary number based on the number
of days until the next full moon).  That's why those puny little F1 engines
produce so much power.  That's also why our "puny" 68hp diesel pulls so well
at low speeds -- the low speed torque is much more than a "higher
horsepower" gas engine produces, so at a given low speed we actually put out
quite a bit more horsepower than the gas counterpart.  However, because we
don't rev as high, the actual "maximum horsepower" developed is considerably
lower.  Over a range of, say 1000-3000 rpm a diesel may produce (say) 50%
more torque, so OVER THAT RANGE we would be producing maybe 50% more
horsepower.  But since the gas could rev to (say) 6000rpm, altho producing
less torque over the entire range, it would have a higher "maximum
horsepower".

just my $0.02Cdn...
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