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Wd engine build help
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Free37 View Drop Down
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Joined: 02 Jun 2014
Location: Knoxville tn
Points: 10 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Free37 Quote  Post ReplyReply Direct Link To This Post Topic: Wd engine build help
    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
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21034 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.
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Joined: 02 Jun 2014
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Points: 10 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Free37 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2014 at 8:11am
What is a good compression ratio for 110 octane
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bigcountry48 View Drop Down
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Joined: 28 Aug 2011
Location: Georgia
Points: 1100 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bigcountry48 Quote  Post ReplyReply Direct Link To This Post 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.

Edited by bigcountry48 - 03 Jun 2014 at 8:34am
1950 B, 1952 pulling wd, and 1954 wd45
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Free37 View Drop Down
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Joined: 02 Jun 2014
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Points: 10 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Free37 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2014 at 3:07pm
Does anybody have an ideal for pistons on this engine
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Joined: 25 Apr 2011
Location: Reedsburg, Wi
Points: 359 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fields Quote  Post ReplyReply Direct Link To This Post 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 ?.
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Points: 10 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Free37 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2014 at 9:28pm
The rod is 7.250 center to center
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Joined: 25 Apr 2011
Location: Reedsburg, Wi
Points: 359 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fields Quote  Post ReplyReply Direct Link To This Post 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/
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