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Tractor Pulling Discussion Forum

Super M Block

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unknownm

06-03-2010 19:17:40




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I was wondering if anyone had any luck with building a 325 or 350 cube inch block and how it was pulling, and if they could give me any advice on building it or what rpms they run. looking to build a small fair tractor or something of that sort, but I would like to turn around 3000, or higher




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dblair

06-04-2010 16:26:47




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 Re: Super M Block in reply to unknownm, 06-03-2010 19:17:40  
well then bore would be 4.310 and a stroke of 6.75 should give you at least 90hp and about 2500 to 3000 thousand lighter . any of the builders on this site can help you . good luck.



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Josh Blackburn

06-04-2010 19:51:36




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 Re: Super M Block in reply to dblair, 06-04-2010 16:26:47  
I could be wrong but that size motor should be quite a bit more than 90hp, upwards of 130 or more. Of course all depending on head, cam, and other mods.



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dblair

06-04-2010 09:25:11




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 Re: Super M Block in reply to unknownm, 06-03-2010 19:17:40  
how much hp do you want. it takes about ten hp a thousand pounds to have a chance at stock classes.



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unknownm

06-03-2010 19:44:31




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 Re: Super M Block in reply to unknownm, 06-03-2010 19:17:40  
and what size of pistons and how much stroke they have



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unknownm

06-04-2010 13:51:08




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 Re: Super M Block in reply to unknownm, 06-03-2010 19:44:31  
well i would like to pull up to 8500 lbs class and as low as 5500



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unknownm

06-05-2010 11:28:57




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 Re: Super M Block in reply to unknownm, 06-04-2010 13:51:08  
Thats what I thought it should be around 130hp



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