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Differences in bore spacing for early Desoto and early Dodge hemis?
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56D500boy
Posted 2021-11-27 2:01 PM (#617199)
Subject: Differences in bore spacing for early Desoto and early Dodge hemis?



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I'm asking the question because Willem Weertman, in his book, "Chrysler Engines - 1922 to 1998" seems to state that they are the same, which I DO NOT believe.

Furthermore, the bore spacing that he states for a 241-270-315-325 1953-1957 Dodge hemi ("double-rocker") engine does not jive with what I measure on a gasket kit that I bought for my 315 D500 engine.

SOoo...if anyone has access to a Desoto hemi, could you please measure the bore center-to-center spacing and report back here?

Thanks in advance.

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springsweptwing
Posted 2021-11-27 2:25 PM (#617200 - in reply to #617199)
Subject: Re: Differences in bore spacing for early Desoto and early Dodge hemis?



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Location: Blackpool, United Kingdom.		Check here,



(Screenshot_20211127-192528_Samsung Internet.jpg)



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Attachments Screenshot_20211127-192528_Samsung Internet.jpg (193KB - 106 downloads)
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56D500boy
Posted 2021-11-27 2:53 PM (#617201 - in reply to #617200)
Subject: Re: Differences in bore spacing for early Desoto and early Dodge hemis?



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springsweptwing - 2021-11-27 11:25 AM
Check here,


Thanks. But "Here" is an image of something.

What is the source of the information? Link? (Sorry - need something to verify)

Edited by 56D500boy 2021-11-27 3:42 PM
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springsweptwing
Posted 2021-11-27 3:35 PM (#617202 - in reply to #617201)
Subject: Re: Differences in bore spacing for early Desoto and early Dodge hemis?



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Location: Blackpool, United Kingdom.		Hi Dave,

Chrysler, Desoto and Dodge are all different, nothing swaps over,


http://victorylibrary.com/mopar/hemi-c5.htm

https://board.moparts.org/ubbthreads/ubbthreads.php/topics/713818/al...

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56D500boy
Posted 2021-11-27 4:27 PM (#617205 - in reply to #617202)
Subject: Re: Differences in bore spacing for early Desoto and early Dodge hemis?



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springsweptwing - 2021-11-27 12:35 PM Hi Dave,
Chrysler, Desoto and Dodge are all different, nothing swaps over.


Thanks Paul. Great Link(s).

I knew that the Chrysler-Desoto-Dodge early hemis were all different. I guess the fact checker/proof reader for Willem Weertman's book had a bad day when they were checking the Desoto and Dodge tables.

In Table 8.2 page 139 of Weertman's book he has the 52-57 Desoto hemi bore spacing at 4.3125" and the block length at 20.844"

In Table 8.3, page 144, Weertman has the 53-57 Dodge hemi bore spacing at same 4.3125" bore spacing and the same block length 20.844" .

Thanks to that link (screen shot below), it confirms that Weertman screwed up. The 53-57 Dodge hemi bore spacing is 4.1875" (not sure what the block length is).

For 3 bore spacings on a 241-325 Dodge hemi round port exhaust gasket, I was measuring about 12.5" (by eye with a measuring tape) which would yield a bore spacing of about 4.166" spacing instead of the 4.1875" listed in the Victory Tech Papers table (about a 0.5% error). I didn't know whether Weertman screwed up in his book or I can't measure worth cr@p or the gasket I was using was wrong.

Now I know.

Thanks.




Edited by 56D500boy 2021-11-27 4:32 PM




(EarlyHemiEngineSpecsFromVictoryTechPapers.jpg)



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Attachments EarlyHemiEngineSpecsFromVictoryTechPapers.jpg (211KB - 102 downloads)
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