Farm Equipment - WD engine compression

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WD engine compression

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=9764
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Topic: WD engine compression

Posted By: den/southern illinoi
Subject: WD engine compression
Date Posted: 20 Mar 2010 at 6:51pm

What is the normal expected compression on a WD engine. If that is too hard to answer, what would the compression be on a standard rebuilt WD engine. Thanks, Den

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Own 4 wheel 20, 2-5015, 5020 and associated equipment and 2 electric forklifts.

Replies:

Posted By: GregLawlerMinn
Date Posted: 20 Mar 2010 at 7:45pm

The original 201 gas engine had a compression ratio of 5.75:1; that would result in approx 90 psi compression. However, after market rebuild kits that have higher compression ratio pistons have been around for a long time. 100-120 would be a tight one. If all cylinders are fairly equal in compression (within 5psi of each other), 80-100 should run smoothly.