Granted, you will notice some differences, but its also important to note
that around those times, emissions regulations grew continually heavier and
engines that used to put out significant numbers were choked down to
approximately 0.5 HP/CID.
Dave Casey
----- Original Message -----
From: "Vincent Van Humbeeck" <vincent.vanhumbeeck@xxxxxxxxxx>
To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
Sent: Monday, September 29, 2003 12:29 AM
Subject: Re: [FWDLK] DAMMIT, we're in agreement; I hate that!
> It's hard to believe that Chrysler would purposedly gives a lower HP
figure
> than its competitors. Horsepower being what it was for car sales in the
'50s
> and '60s, they would certainly follow the common practice among car
> manufacturers, in order to stay in the competition. Furthermore, that
would
> mean that Chrysler manufactured engines that pumped out 100 hp (or so)
more
> than their competitors for the same global price. Among the big three,
> horsepower was often similar for a given engine class.
>
> And finally, the way an engine was dynoed was pretty much defined as an
SAE
> norm. Until the early '70s, an engine was dynoed stripped from all its
> accesories, just as you described it. Then they switched to fully dressed
> engine, because it meant more to the basic customer. Being a norm, every
> manufacturer switched to that new procedure. You can check the HP ratings
> for a similar engine between say 1970 and 1974, you'll see the difference,
> EVEN at Chrysler.
>
> Vincent Van Humbeeck
> '58 Plymouth Belvedere Sport Coupe
>
> -----Message d'origine-----
> De : Forward Look Mopar Discussion List
> [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx]De la part de Ray Jones
> Envoye : dimanche 28 septembre 2003 5:53
> A : L-FORWARDLOOK@xxxxxxxxxxxxx
> Objet : Re: [FWDLK] DAMMIT, we're in agreement; I hate that!
>
>
> No documentation, but here's how I heard it many years ago from one who
> worked in styling. When Chrysler dynoed an engine, it was full dress. that
> is, with all accessories, such as water pump and gen/alt. A/C wasn't as
> common then, so probably not on the engine.
> When Ford and Chevy did it, they used stripped eng with the proper temp
> water pumped thru with an external pump, good coll air supplied, and
nothing
> that could rob some power working.
> So , when Chrysler said it was 285 hp, that was as delivered and used in
> your car, and it was usually rounded down, say from 288 or suchlike. Ford
> and Chebbie weren't even close to the claimed in usable form.
> That's what the man said.........
> Ray Jones
>
>
> From: DupontTim@xxxxxxx
> Reply-To: DupontTim@xxxxxxx
> Date: Sat, 27 Sep 2003 20:31:50 EDT
> To: L-FORWARDLOOK@xxxxxxxxxxxxx
> Subject: Re: [FWDLK] DAMMIT, we're in agreement; I hate that!
>
>
>
>
> Gang, I firmly believe that advertised HP ratings are mostly cooked up.
But
> in my documents there is one factory supported reference. I have a factory
> dyno sheet on the newly available 56 D500-1 dual quad engine dated 3-9-56
> and it was done on a used D500 mule engine with the key dash one parts
added
> i.e. the dual intake and Large exhaust (2 1/2 incher 4 bolt flange) which
by
> the way unlike Chryslers were not truck but D500 only for 56, the cam was
> stock D500 and so was the CR at 9.25. The readings peaked at 276 HP & 322
> ft lbs about 16 over the D500 advertised rating. The engine however was
then
> improved with the higher compression heads and reprofiled cams for high
> speed, the carbs were also eventually rejetted after dyno work by Danny
> Eames in April. However when I had the privilege of talking to a
Kiekhaefer
> dyno mechanic referred to me by Wayne G a few years back he stated that
> routinely the Dodges when blueprinted and dyno tuned were in excess of 1
HP
> per cubic inch with all "stock" components and likewise the Chryslers
easily
> exceeded all stated ratings. This leads me to believe that the factory was
> in no way looking to boost ratings. Just my 2 cents, Tim
>
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