Okay, I've got to admit that I just don't get how any of this "data" is
empirical. How did Motor Trend acquire their test cars? Did they buy them
or borrow them? Did they do anything to the cars or just test them as
delivered? Were the tests performed under scientific conditions? Did the
tests vary from year to year? Were they bribed? Etc.
As Paul Holmgren [among others] mentioned, a little tweaking of the tune on
a hemi can result in significantly higher horsepower. A little more
tweaking can result in awesome increases in power.
The old anecdotal story I heard about gross horsepower is that the engine
was fired up on a stand with no accessories and they got the highest reading
just before it blew up.
Just what is it were trying to "prove" here? That there were no sub-15
second runs in '56-'57? That a particular '57 was faster than a particular
'56?
Seems to me that race 'em on Saturday sell 'em on Monday was the mode of
operation in those days.
I have a relative [fortunately distant] that does genealogical studies by
extrapolating the customs of the day to project how where when and why our
ancestors moved from place to place. Serious genealogists just laugh at
him. I'm seeing a similarity here...
--Roger van Hoy, Washougal, WA, '55 DeSoto, '58 DeSoto, '56 Plymouth, '66
Plymouth, '41 Dodge
----- Original Message -----
From: "eastern sierra Adj Services" <esierraadj@xxxxxxxxx>
Motor Trend, & Hot Rod put their test cars on dynamometers, and recorded
rear wheel HP on a factor of about 50% of the advertised HP; parasitic drag
thru the driveline is usually accepted as being about 15-20% of flywheel
horsepower.
For the 260 gross HP 1956 D500, MT recorded 132 RWHP, iirc.
Neil Vedder
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