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Tractor Pulling Discussion Forum

Repowering M, with 400 engine

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dean jasper

03-25-2020 05:51:12




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Bringing my Dads 47 M back to life. Repowering with 400 engine. Can anyone out there give some helpful information? I believe I have to change governor, & clutch, flywheel.




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ep

03-27-2020 03:32:32




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 Re: Repowering M, with 400 engine in reply to dean jasper, 03-25-2020 05:51:12  
Use the 400 flywheel and use a super m clutch disk. It's 12 inch compared to 11.5. Everything else will bolt in, keep 400 governor.



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LCB

03-26-2020 15:59:16




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 Re: Repowering M, with 400 engine in reply to dean jasper, 03-25-2020 05:51:12  
Take orginal block pull sleves and run 450 pistons and use 450 head manfold head carubator.



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Jd man wis

03-26-2020 06:03:49




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 Re: Repowering M, with 400 engine in reply to dean jasper, 03-25-2020 05:51:12  
I have seen some of the guys do that switch with 350 an 40s and they do good for the couple of the tractor pulls only to have guys at the next pull be a bunch of rule police and get them to have to pull in the open class or imove class. I think it is cool when someone builds a tractor to pull and to do good with it. I have seen some Hs with 318 360 350 an bigger in them an they do good. On the H and M with a bigger crank and cam and bore a guy can get very good power out of them an look stock. In pulling you can do any thing you can to the tractor as long as u don't win or beat someones buddy then the next pull here comes the tractor club police.

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VicS

03-26-2020 06:38:45




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 Re: Repowering M, with 400 engine in reply to Jd man wis, 03-26-2020 06:03:49  
Here in Southern Illinois have to be at least that big to not power out in 1st. No body will care if you have a 400 450 motor. Because theirs will be 100 cu. Bigger.



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20MuleTeam

03-28-2020 13:29:45




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 Re: Repowering M, with 400 engine in reply to VicS, 03-26-2020 06:38:45  
2" stroke would be a good idea, maybe?



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