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Minneapolis Moline Tractors Discussion Forum
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MM GTB PISTON ?'s

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davidttsmith

03-18-2006 15:03:35




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Hello started tearing down a 53 g i bought they let it sit with water in it and cracked the blocks on it got it all tore apart today and discovered something odd to me . all i have is an old set of calipers but according to them the pistons measured 4.740. i was wondering what these are from on the side of the pistons is says WMW A1102 can any one cross this number over they are aluminum. any ideas how much more hp this would create? any info is appreciated. thanks

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Andy2

03-19-2006 07:55:04




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 Re: MM GTB PISTON ?'s in reply to davidttsmith, 03-18-2006 15:03:35  
I have a set of blocks if you are interested.



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Charlie Biler

03-18-2006 20:41:59




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 Re: MM GTB PISTON ?'s in reply to davidttsmith, 03-18-2006 15:03:35  
What you have is a set of Gould overbore pistons. They are the four and three quarter inch size. They were sold under about ten different brand names. The pistons would expand and were deliberately made undersize at the upper lands, as not to seize.

Too bad the blocks are split. Those one-eighth inch overbore blocks and aluminum pistons make for a sweet runner on the track, and the field too. Find yourself another set of worn out blocks and bore them to fit those pistons. Another set of rings will get you back to where you should be. You will be happy.

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