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Tractor Pulling Discussion Forum

Re: 44 or A

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north puller

11-01-2012 14:28:18

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Both in their work clothes, the massey has 10 more hp then the jd. That should tell you right there.

Best bang for buck would be rebuild the massey to a 277 with custom pistons (extreme tractor parts shows massey pistons on their website). Check what your pulls will allow you to run for fuel, then pick your compression ratio. I would aim for 10:1 - 12:1. Freshen up the valves if needed and go. It will take a stroked A to keep up.

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11-01-2012 16:47:37

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 Re: 44 or A in reply to north puller, 11-01-2012 14:28:18  
I heard that you can put in 3020 gas pistons in a 44. Can you bore the block and sleeve it that big without problems. Thanks

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11-02-2012 04:48:23

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 Re: 44 or A in reply to MH-JD, 11-01-2012 16:47:37  
4020 pistons gets you 4.25 bore... Can go to 4.625 and still be very reliable. there's a 4.5 inch piston thats fits real well also. Out of an International gas V8, don't remember exact application at this time. Have to check my notes... 5" can be done if you want to spend the money.

What kind of class/rules you looking to fit?

Will take a well built A to keep up with a mild 44. 44 is comparable to a G in size from factory HP... Just wieghs 1000-1500lbs less... 9 bolt wheels without special hubs or adapters. Easy to balance. Tough rearend will take abuse.

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north puller

11-01-2012 17:34:35

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 Re: 44 or A in reply to MH-JD, 11-01-2012 16:47:37  
Sorry. Don't know for sure what is required to make that work.

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