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Case DO displacement

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Frank

06-10-2003 03:47:17

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Anybody know the displacement and dimensions of the late DO/DC engine vs. the earlier models? I believe mine to be late 1953 model, and have seen references on here that the engine specs were different on the very late versions. Thanx in advance.

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Paul f

06-10-2003 05:53:19

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Re: Case DO displacement in reply to Frank, 06-10-2003 03:47:17

Frank with 3 7/8 (3.825) bore engine displaces (3.825 * 3.14* 5.5stroke * 4) 268 inches

Late models had 4 in bore 276 inches

paul f

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Paul f

06-10-2003 06:05:51

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Re: Re: Case DO displacement in reply to Paul f, 06-10-2003 05:53:19

OOPS Little fat fingers on calculator. 3 7/8 bore yield 264 cu inches

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This was a test

06-10-2003 15:22:39

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Re: Re: Re: Case DO displacement in reply to Paul f, 06-10-2003 06:05:51

Mea Culpa...It has been awhile since geometry

Area is pie * radius squared... not pie * diameter

Therefor the small bore is 3.825/2 = 1.9125
squared is 3.658
times pie 3.14 = 11.486
times stroke 5.5 = 63.17 cu in per cylinder
times 4 = 252.7

As 4" diameter = radius squared the answer for the later engine was correct (by accident)

How come none of you guys caught me? :-)

Paul f

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Bill Hires

06-10-2003 05:41:58

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Re: Case DO displacement in reply to Frank, 06-10-2003 03:47:17

C & D Bore = 4.0", Stroke 5.25" CID = 276.4. Early Bore = 3.875", Stroke 5.25" CID = 260.

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Paul f

06-10-2003 05:55:22

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Re: Re: Case DO displacement in reply to Bill Hires, 06-10-2003 05:41:58

Bill My manual shows 5 1/2" stroke, however I have never measured teh engine itself.

Paul f

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Bill Hires

06-11-2003 04:51:26

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Re: Re: Re: Case DO displacement in reply to Paul f, 06-10-2003 05:55:22

This information came from the J. I. Case I & T Shop service manual C-201.

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