What factors do they address to get from old gross numbers to
today's net numbers? I seem to recall that the old gross numbers
were obtained without running ancillaries like a
generator/alternator, power steering pump, A/C, etc., but what
else? I believe from his wording that Mr Grossi sent just the
engine itself to the dyno, so there should be no drivechain
losses. And it looks like only the horsepower number was
significantly different than the old measurement, but the torque
number was close to the same. That doesn't make sense to me -
(YET)! I don't know if the peak torque and HP numbers occurred at
about the same RPM as original, but assuming that they are, how
else can that difference be explained?
Ray Melton 300C cvt in Las Cruces, NM
****************************************
--The original ratings were gross. Today's ratings are net.
Sent from my Verizon, Samsung Galaxy smartphone
Hello Group,-------- Original message --------From: Frederick Grossi <e55grossi@xxxxxxxxx>Date: 1/11/24 12:53 PM (GMT-05:00)Subject: {Chrysler 300} 300F Engine Dyno Results
The rebuild on my 300F engine has been completed and the engine rebuilder sent it to the dyno for break-in, running condition and leak detection.
The engine is stock, stock carburetors and ram intake manifold, stock bore (it was sleeved because of pitting on a couple of the cylinder walls), as stock a cam as you can get, same crankshaft and pistons. The engine was rebuilt by someone else in 1995 before I owned the car. The engine was bored .004 at that time.
My rebuilder wanted to share the results with our group to see if anyone else had similar experiences:
Maximum engine torque - 2,900 rpm- 496 ft. lbs.
Maximum horsepower - 4,600 rpm - 316 hp
The horsepower is about 16% lower than factory specifications of 375hp.
Has anybody else had this differential in hp from factory? Is this normal?
Thank you,
Fred Grossi
Pegram, TN
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