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Discussion Forum

Re: WD/WD45 question (another one)

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Orange Thunder

06-28-2002 03:50:33

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I put a WD45 crank and 175 pistons in mine, they all came with 4" pistons. Tisco even sells 1/8 over bore pistons, the original sleeves were very thick. Also I used the WD cam and it matched right up to the WD45 crank gear.

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Jim in Michigan

06-28-2002 08:48:51

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 Re: Re: WD/WD45 question (another one) in reply to Orange Thunder, 06-28-2002 03:50:33  
The spec sheet says that WD45 is a 4.5 bore and the Wd is a 4 inch bore,, is this correct?

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Orange Thunder

06-29-2002 03:32:45

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 Re: Re: Re: WD/WD45 question (another one) in reply to Jim in Michigan, 06-28-2002 08:48:51  
Yes, see the WD & 45 and flat heads, the pistons are 3/4" from the top of the block. The 1/2 difference in stroke only throws the piston a 1/4", I put the 175 pistons in which are also 4", because they are a 1/4" taller than WD or 45's. And this upped my compression to 185 lbs of compression and she dyno's at 59 h.p. So I still had another 1/4" for the valves to open. Thanks to Allis interchanability!

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