Farm Equipment - AC 170-175 gas compression?

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AC 170-175 gas compression?

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=156120
Printed Date: 27 Aug 2025 at 11:59pm
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Topic: AC 170-175 gas compression?

Posted By: Tracy Martin TN
Subject: AC 170-175 gas compression?
Date Posted: 03 Dec 2018 at 7:41pm

What was the compression ratio on the 170 gas and 175 gas engines? Looking for a rebuild kit. Thanks Tracy

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No greater gift than healthy grandkids!

Replies:

Posted By: Alvin M
Date Posted: 04 Dec 2018 at 6:15am

170 8.00:1 175 8.2:1

Posted By: DrAllis
Date Posted: 04 Dec 2018 at 7:21am

Cranking compression with everything new would be right at 180 psi.

Posted By: Tracy Martin TN
Date Posted: 04 Dec 2018 at 8:14am

DrAllis, Thanks. Tracy

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No greater gift than healthy grandkids!

Posted By: tbran
Date Posted: 04 Dec 2018 at 9:02pm

check pm - you can make your own power crater - overbore.. since you have machine tooling..

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When told "it's not the money,it's the principle", remember, it's always the money..