DeTomaso Mailing List: April 99, Message #598

Melton, Charles P wrote:
>
>If you are familiar with dynamometers, you know that it "takes" one (or two)
>reading(s),
>and then interpolates the rest of the data points.  (Typically at 5250 RPM).
>
>So there is a lot of "estimated" or calculated values in the data set.

I think you misunderstood how a dynojet works. It measures the (angular)
acceleration of a known mass that is equivalent to a (3800 lbs I think)
car. The HP measurement is practically continuous and on the plots I've
seen there is no interpolation that you can see. That's one of the great
things about it, you can see high frequency (5-10 rpm?) variations in HP.
If there is noise on the pull, you know your engine isn't working quite
right. You can see individual missfires I think.

At our (S0. Cal) dynoday last Sept., one of the smoothest cars was Rich
Morgan's Modular 4.6L Cobra powered Pantera. You could see the little step
in power (about 5-10 as I remember) when the IMRC "secondary" plates opened
to let the "other" intake valves breath. That was really impressive.


Sincerely,
Richard Barkley

To Ski or not to Ski, that is the question!

Richard Barkley
(310) 373-6695 (home), 813-2432 (work)
E-mail: richard.barkley@trw.com (work), rbarkley@earthlink.net (home)
Mammoth Condo 2BR+loft/3Bath - Horizons 4 #186 (760) 934-6758
Condo web address: http://home.earthlink.net/~rbarkley