Re. IML: 56 Imperial is there another engine other than a Hemihead ??

["A. Foster" <monkeypuzzle1@xxxxxxx>]

 

Hello:

 I have not had a look at the pistons inside a poly engine but the ones in my Hemi are flat tops, not domed, with notches on either side of the piston, perpendicular to the wrist pin, to accommodate the valves. The polyspheres may have had notches as well but they would be placed more on the diagonal to the wrist pin. The connecting rods and bearings would be the same on both engines, except the 392s. The Chrysler Polys came in 301, 331, and 354 cubic inch displacements as they shared their blocks with the 331/354 Hemis. To my knowledge all of the Imperials built between 1951 and 1958 came with a Hemi between the front wheels.

 There is is website that has more information on these engines, just search under Chrysler Polysphere if you want to know more. Personally if I had a poly engine in a vehicle I would probably leave it alone other then having the combustion chambers and ports polished. They were very good engines that were second only to the Hemis in performance; in fact a smaller version was used in Plymouths and Dodges from 1955 up until 1965 with the 318. The Chrysler poly died with the early Hemi's in 1958, I don't think that the DeSoto ever had one except perhaps in a Firesweep.

Best Regards

Arran Foster

1954 Imperial Newport

Needing A Left side Tailight Bezel and other trim parts.

----- Original Message -----

From: mENTAL mAN

To: mailing-list@xxxxxxxxxxxxxxxx

Sent: Wednesday, December 03, 2003 12:06 PM

Subject: RE: FW: IML: 56 Imperial is there another engine other than a Hemi head ??

GREAT QUESTION !!

I am curious if the "hemi" heads will WORK on a "poly" head block ????

I've seen a "hemi" piston with the rounded top, but what does the "poly" piston look like ??

I passed up a NICE '55 Dodge wagon because it had a "poly" engine and I was only familiar with the "super red ram" engine of that era.

Also............... is the Imperial actually a "Y" body or is it a "C" bodied car ???

THANKS to everyone out there, I am learning SO MUCH from this list.........

This is such a GREAT CLUB !!!..............CHEERS !!!

Michael Howlett

Boring, Oregon

Looking for a '55 or '56 Mopar........ Imp or wagon

Currently have '77 NYB and a FUNKY old Barracuda

plus a BUNCH of other UNimportant cars.............