Below, hopefully, is a table of early hemi displacements-advertised and calculated in Excel. I thought it was strange that the ’51-’55 Chrysler hemi’s displaced 331.06 cubic inches and the ’56 De Soto’s hemi’s displaced 330,41 cubic inches. Seems like a lot of effort for 0.65 cubic inches smaller. Maybe I have bad data for 354’s & 392’s as they appear to be 353’s & 393’s??? EARLY HEMI DISPLACEMENTS, BORES, STROKES | | Year(s) | Car | Model | Disp. | Stroke | Bore | Disp-calc | 1 | '53-'54 | Dodge | Red Ram | 241 | 3.250 | 3.43750 | 241.30 | 2 | '55-'56 | Dodge | Truck (B&S est.) | 259 | 3.250 | 3.56250 | 259.16 | 3 | '55 | Dodge | Super Red Ram | 270 | 3.250 | 3.62500 | 268.34 | 4 | '52-'54 | DeSoto | Firedome | 276 | 3.340 | 3.62500 | 275.77 | 5 | '55 | DeSoto | Fireflite | 291 | 3.340 | 3.72000 | 290.41 | 6 | '56 | Dodge | D500 | 315 | 3.800 | 3.62500 | 313.75 | 7 | '57 | Dodge | D500 | 325 | 3.800 | 3.68750 | 324.66 | 8 | '56 | DeSoto | Firedome, Fireflite | 330 | 3.800 | 3..72000 | 330.41 | 9 | '51-'55 | Chrysler | Chry, 300, NY, Imp | 331 | 3.625 | 3.81250 | 331.06 | 10 | '56-'57 | DeSoto | Fdome, Fflite, Adv | 341 | 3.800 | 3.78120 | 341.37 | 11 | '57 | DeSoto | Adventurer | 345 | 3.800 | 3.80000 | 344.77 | 12 | '56 | Chrysler | NY, 300, Imp | 354 | 3.625 | 3.93750 | 353.13 | 13 | '57-'58 | Chrysler | NY, 300, Imp | 392 | 3.910 | 4.00000 | 393.08 | 14 | 2003-2005 | Dodge, Chry | Truck, SUV, 300C | 345 | 3.580 | 3.92000 | 345.65 |
Rich Barber Brentwood, CA From: Chrysler300@xxxxxxxxxxxxxxx <Chrysler300@xxxxxxxxxxxxxxx> On Behalf Of Scooter465@xxxxxxx [Chrysler300]
Sent: Thursday, August 16, 2018 1:09 PM
To: Keith Boonstra <kboonstra@xxxxxxxxxxxx>
Cc: John Grady <jkg@xxxxxxxxxxxxxxxxx>; dverity@xxxxxxxxxxx; David Schwandt <finsruskw@xxxxxxxxxxxxxxx>; chrysler300@xxxxxxxxxxxxxxx Club <Chrysler300@xxxxxxxxxxxxxxx>
Subject: Re: [Chrysler300] regular 354 Windsor block to a HEMI??? One thing I always thought was strange. The 56 DeSoto all models had a Hemi. But the 56 Windsor model Chrysler’s has the poly Spitfire engine. Bob Haag John, I think you would have enjoyed working alongside of Burt back in the day. You ought to email him with your questions/comments. He still enjoys all the bantering about these things. On Thu, Aug 16, 2018 at 2:25 PM, 'John Grady' jkg@xxxxxxxxxxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote: And exhaust manifolds , front of engine stuff may change etc. 354 Block is the same ; ---if serious , Hot Heads aluminum hemi heads and intake is the way to go on this idea. Rebalance needed too. Lots of $. Same steel crank Also true of 57-58 Dodge 325 poly and dodge, raised Red Ram block / hemi heads (56-57 315/325) However , power pack 325 4 bbl poly is only about 15 HP down on a hemi D500 ; not worth all that work . What is HP of 354 Windsor poly with 4 bbl? Probably not bad. Surprises people Interesting on that, Dodge changed the lifter angles between 241/270 low block hemi and 315/325 raised block mini hemi , (made both correct, thank you Burt) making identical appearing Dodge V8 cams or cam cores not interchange at all (big pit there if you did not know that..I did not!) . But Chrysler apparently did not change lifter angles?? To 392? . . I wanted to talk to Burt about that, but time flew by. The legacy of that, which he passively agreed to, smiling, was the 273/318 /360 has poor pushrod angles all the way through production (tooling originally designed for a Hemi or Poly rocker tip location, which is closer to center of bores) ..must have used the same , then new, tooling. Chrysler came up with the special R block to fix that, 20+ years later? which then required a special camshaft. Somehow it all ties together…
I would think you would at least need Hemi pistons, and push rods. Sent: Thursday, August 16, 2018 12:04 PM Subject: [Chrysler300] regular 354 Windsor block to a HEMI??? I have been told, mainly by folks on the F/L site, that a regular 354 block such as would be found in a 57 Windsor, can Be converted into a Hemi simply by installing hemi heads. Forgive my stupidity here, but why am I just now hearing about this and is it true. What all is involved?? Sounds WAY to simple and easy to be true... What am I missing here if anything?? Dave Schwandt
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Posted by: "Rich Barber" <c300@xxxxxxx>
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