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Minneapolis Moline Tractors Discussion Forum
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MM heads?

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Joshua Ratliff

02-05-2007 13:13:11




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I have several MM heads that are for the U/UB series I believe. can anyone tell me what they are?. the numbers are GE-30T, 10A4207, GE30Z, and 10A4210. Thanks in advance for any help




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MMEd(La)

02-08-2007 05:00:47




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 Re: MM heads? in reply to Joshua Ratliff, 02-05-2007 13:13:11  
Assuming you are working with a 283 U/UB motor, GE30T and 4207 will be 9.3:1 which is pretty high unless you are running LP. The GE30Z and 4210 as well as GE30M would be 6.95:1. Not sure about these, but my GE30E has the old super big spark plug while its 4209 mate has newer more modern plug - but same CR. Optimum gas pulling heads probably GE30J / 4213. I am looking for a pair of matched usable heads - if you want to get rid of a pair or GE30Z or 4210's.

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Ken Majeski

02-05-2007 13:36:35




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 Re: MM heads? in reply to Joshua Ratliff, 02-05-2007 13:13:11  
Well.... You can find out here and what the comp ratio will be on Different engines...



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