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Allis Chalmers Discussion Forum

WD-45 crank in a WD engine?

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Author  [Modern View]

03-05-2010 17:17:56

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Hi, do you think I can use a WD45 crank in my wd motor with using flat (WD) pistons? I heard that it may be too much compression. It will be used for work and not pulling. Any advice?

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al schooley

03-06-2010 07:05:40

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 Re: WD-45 crank in a WD engine? in reply to Jiminiowa, 03-05-2010 17:17:56  
it will work just finished putting my motor together monday night. But i am using it for a pulling tractor.The guys i talked to said that u will have more compression and more torque buy add 1/2 inch more stroke with the 45 crank.i do have a wd crank. i have a nice one that i took out of that motor it has been turned .20 under.If i knew this motor was a fresh rebuild i would of never tore it down.

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03-05-2010 18:31:58

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 Re: WD-45 crank in a WD engine? in reply to Jiminiowa, 03-05-2010 17:17:56  
same size crank just did one not long ago but I did use new sleeves, rods, pistons and ofcourse bearings
good luck

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Mike Bock

03-05-2010 18:07:46

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 Re: WD-45 crank in a WD engine? in reply to Jiminiowa, 03-05-2010 17:17:56  
yes,if cranking pressure is to high add e85 to fuel to keep from detonating if your engine has a ring ridge in it rings will catch on ridge not recomended unless you have new sleaves , their are different wd pistons also wouldnt recomend tall pistons for farm use unless used high octane fuel alot of things need to be considered when swapping parts I have tall wd pistons in my pulling tractor with 4.5 crank has 225 psi cranking pressure to much for cheap gas but runs fine on e85

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