Pulling Forum - Wd engine build help

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Wd engine build help

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=90430
Printed Date: 28 Nov 2024 at 1:57pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Wd engine build help

Posted By: Free37
Subject: Wd engine build help
Date Posted: 02 Jun 2014 at 8:12am

I'm build a wd with the 45 crank and it is stroked 5/8 with farmall c rods I need to figure out what pistons to us I have 4.125 sleeves. Thanks

Replies:

Posted By: DrAllis
Date Posted: 02 Jun 2014 at 10:39pm

With the crankshaft installed in the block and one connecting rod installed on the crankshaft, measure down from the top deck as to where the piston pin center is located at TDC. Then, you need to decide what compression ratio you want and calculate from there.

Posted By: Free37
Date Posted: 03 Jun 2014 at 8:11am

What is a good compression ratio for 110 octane

Posted By: bigcountry48
Date Posted: 03 Jun 2014 at 8:34am

11:1 would probably be the best choice, not too much stress on the motor and it will run that octane.

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1950 B, 1952 pulling wd, and 1954 wd45

Posted By: Free37
Date Posted: 03 Jun 2014 at 3:07pm

Does anybody have an ideal for pistons on this engine

Posted By: Fields
Date Posted: 03 Jun 2014 at 9:25pm

Is a farmall c rod 8 inch center to center. You can figure a cr. Needed with pistons. Deck high is like 12.625 inches. Take half your stroke. The rod length and the piston pin higth . Remember your allis head is flat. So any combustion chamber will be in the piston or the space between the piston and the head. Not for sure on the head gasket thickness but felpro one is ? .043 ?.

Posted By: Free37
Date Posted: 03 Jun 2014 at 9:28pm

The rod is 7.250 center to center

Posted By: Fields
Date Posted: 03 Jun 2014 at 9:43pm

I got bored. So here is a Ih 8 cylinder or 4 cylinder truck engine piston that might work. http://www.summitracing.com/parts/slp-h996cp/overview/