The site says that the cam was "phased" 4 degrees retarded, and it also says
that without the correct timing gear setup, you lose 10% in torque. Makes
sense, the factory worked hard to find these optimum settings. The short ram
(with peak torque at 3600 rpm) probably had a larger duration and overlap cam.
So, any cam for a big block designed to give peak torque in the same speed
range, will probably work well.
D^2
Quoting Kerry Pinkerton <pinkertonk@xxxxxxxxx>:
>
> What was the cam difference? And what would be the correct cam today?
> The
> proverbial RV cam?
>
> KerryP
> Patch panels fabricated
> Pinkertonk@xxxxxxxxx
> dte.net/57imperial
> Imperials -- 50 Limo, 57 roadster, 61's, 64, 68 Convert, 73, a 66 300
> and a
> bunch of lesser marques
> ----- Original Message -----
> From: Bill Watson <wwatson@xxxxxxxxx>
> To: <mailing-list@xxxxxxxxxxxxxxxx>
> Sent: Friday, February 07, 2003 2:56 PM
> Subject: Re: IML: Imperial and cross-rams
>
>
> >
> > The manifolds and carbs can be placed on the engine without doing any
> > internal revsisons. I, too, doubt the car was built with the
> cross-ram
> at
> > the factory,
> >
> > Chrysler of Canada did not offer the cross-ram manifold on any
> > Canadian-built Chrysler product. And the only imported car with the
> > cross-ram manifolding that Chrysler of Canada offered was the
> Chrysler
> > 300-G. So the parts would have to have been imported if it was done
> when
> > the car was new.
> >
> > I also bet that "... garage door opener which was on the dash of the
> car"
> > is, in reality, the Automatic Beam Changer.
> >
> >
> > Bill
> > Vancouver, BC
> >
> >
> >
> >
> > ----- Original Message -----
> > From: <dardal@xxxxxxxxxxxxxxx>
> > To: <mailing-list@xxxxxxxxxxxxxxxx>
> > Sent: Friday, February 07, 2003 6:27 AM
> > Subject: IML: Imperial and cross-rams
> >
> >
> > > Quoting Elijah Scott <imperial1971@xxxxxxxxx>:
> > >
> > >
> > > > I seriously doubt that any Imperials left the assembly
> > > > line with the cross rams (but it was possible, 'cause
> > > > in the '60s, you could order dang near anything). But
> > > > it would have been very easy for buyers to have
> > > > requested them and have the dealer install them.
> > >
> > > In order to get a proper conversion to the 375 hp 413, in addition
> to
> the
> > cross
> > > rams, you would need to also replace the cam. There may be more
> internal
> > > differences between a standard 413, and the high output 413 of the
> letter
> > cars,
> > > but the two major performance mods are the intake manifold and the
> cam.
> > > Installing the manifold with the stock cam may have negative
> effects.
> > Would a
> > > dealer undertake such modifications?
> > >
> > > D^2
> > >
> > >
> > >
> > >
> >
> >
> >
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