Re: {Chrysler 300} 300F Engine Dyno Results

[Jean-Yves Chouinard <jymopar@xxxxxxxxxxx>]

Coincidence? My F engine pulled the exact same #'s a few years back on a dyno! Mine got 493 ft.lbs of torque at 2800 rpm and 315 HP at 4500rpm.

 I found that the carb to manifold gasket was keeping the secondary butterflies from opening fully at WOT, gasket hole just not perfect...found that after the engine was out of the dyno room and we concluded that was why the low HP numbers...

Check your carb gaskets to make sure secondary butterflies operate freely?

JYves.

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From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> on behalf of Frederick Grossi <e55grossi@xxxxxxxxx>
Sent: January 11, 2024 5:53 PM
To: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: {Chrysler 300} 300F Engine Dyno Results

 

Hello Group,

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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