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Allis Chalmers Discussion Forum

C Allis Engine Rebuild

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Danofarming

10-23-2005 19:26:01

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I want to buid my engine to a D-14 Engine. What all will I have to change besides the crankshaft?

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Dick L

10-24-2005 07:40:23

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Yup, You Can! in reply to Danofarming, 10-23-2005 19:26:01

I put the D-14/15 over bore kit in my C. All it takes in money and a good machine shop that don"t tell you that you shouldnt do it. The OD of the sleeve flanges of D-14 are the same as the C. You will have to bore the C block to the diameter of the D-14 sleeve. You will have to email me for the exact information.

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Texas Denny

10-23-2005 21:02:56

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Re: C Allis Engine Rebuild in reply to Danofarming, 10-23-2005 19:26:01

While the block is the same, the conversion will not be easy. The D-14 has a 0.500" larger bore and a 0.3875" longer stroke. I could calculate it (or you could as well), but without calculating, I don't know if the extra bore and stroke would be enough to increase the compression ratio from 5.75:1 to 7.5:1. At any rate, I don't think the C block will accept more than sleeves with an 1/8" larger bore. To get in bigger sleeves than that, you'd need to re-machine the block.

Great idea though. If you have any success, I for one would sure be interested. Hope someone else can shed some light.

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