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Allis Chalmers Discussion Forum

wd rod

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pike wd45

01-09-2004 15:37:21

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can a wd rod be cut and extended so the stock wd piston will come up to deck of block mqre for more compression?

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01-10-2004 15:30:02

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 Re: wd rod in reply to pike wd45, 01-09-2004 15:37:21  
Rods from leroi engines are 8 in ceneter to center and will bolt in, allis wd rods are 7.5 in, have ran welded rods and never seen one break, but be careful to do it right and box the sides in

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01-10-2004 17:35:24

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 Re: Re: wd rod in reply to Allis, 01-10-2004 15:30:02  
I think a 8 in. rod in a wd engine with 7.5 in. rods would be a little much. If the pistin sidn't hit the head the increase in compression would probably blow the head off anyway. There is only approximately 1/2" between the top of a poston at TDC and the surface of the head.

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L Hud

01-10-2004 06:26:22

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 Re: wd rod in reply to pike wd45, 01-09-2004 15:37:21  
If you want to get closer to the top of the block, just use WD pistons on a 45 crank. They come in a couple of different heights. Propane and 8000 alt. are available,so is a 5000 alt. It will give you all the compression you should need. Welded rods are not the way to go. Hope this helps.

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01-09-2004 19:04:05

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 Re: wd rod in reply to pike wd45, 01-09-2004 15:37:21  
no. buy taller pistons, or best to get a crank from an old WD45, they have a longer stroke and will get more cubic inches also.

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