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Tractor Pulling Discussion Forum

Journal size JDB pullers put on cranks?

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elkcagg

12-01-2013 09:19:37
107.225.103.184



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Just wondering what size journals most people are putting on JDB cranks. Is 3" too big? I have a set of welded rods I'd sell very reasonable that have the 3020/4020 journal welded to an A rod but the CTC is 12"?. Maybe these would work in a B setup but if no here would be interested in them no sense in me putting them on the classifieds. The guy I bought these from was going to put this in a A with 8-3/4" stroked crank & use MW style pistons. The rod to stroke ratio is not good in my opinion for any A. Otherwise I'll hang them on the wall or scrap them. Thanks

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1939A

12-01-2013 17:21:41
72.35.166.113



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 Re: Journal size JDB pullers put on cranks? in reply to elkcagg, 12-01-2013 09:19:37  
How much are you asking for them and di you have a few picks? Thanks Tom



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Josh Blackburn

12-01-2013 10:34:48
174.239.5.91



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 Re: Journal size JDB pullers put on cranks? in reply to elkcagg, 12-01-2013 09:19:37  
2.25-2.75 is common.



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James Neff

12-01-2013 20:40:43
166.137.101.157



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 Re: Journal size JDB pullers put on cranks? in reply to Josh Blackburn, 12-01-2013 10:34:48  
Want to know if you can help me I need to find someone to build me a crank for a unstyled A



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Josh Blackburn

12-02-2013 05:13:39
174.239.40.8



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 Re: Journal size JDB pullers put on cranks? in reply to James Neff, 12-01-2013 20:40:43  
Yes I can. 9892775366



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rbl

12-01-2013 10:05:37
50.32.14.21



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 Re: Journal size JDB pullers put on cranks? in reply to elkcagg, 12-01-2013 09:19:37  
what is the correct rod to stroke ratio ?



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elkcagg

12-01-2013 11:15:31
166.197.83.181



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 Re: Journal size JDB pullers put on cranks? in reply to rbl, 12-01-2013 10:05:37  
From what I've researched 1:6 ratio is about the lowest I'd go on a 2 cylinder.



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