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Allis U/UC Puller
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The Other Orange View Drop Down
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Joined: 22 Jul 2012
Location: Indiana
Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote The Other Orange Quote  Post ReplyReply Direct Link To This Post Topic: Allis U/UC Puller
    Posted: 25 Jan 2013 at 8:55am
Anyone ever pull one of these? With a 4.5bore 5stroke you should be able to make a large cu in engine. Whats one of these weigh?
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AllisUc View Drop Down
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Joined: 15 Jul 2012
Location: Wisconsin
Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AllisUc Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jan 2013 at 3:33pm
My uc weighs 5500 with the 318 and 18,4-28 on the rear 
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CAL(KS) View Drop Down
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Joined: 18 Sep 2009
Location: Chapman, KS
Points: 3786 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CAL(KS) Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2013 at 5:21am
I have a little info regarding building a UC puller.  Know of one that was bored to 4.625 and used MM G1000 pistons to bump the compression. 336 cubes with a cam grind, guy said it wasnt a bad puller but i cant see it doing real well with small factory rubber. May be possible to go larger bore im not sure yet.  I have been mulling over pulling my UC for a while.
 
compression height on gas UM pistons is over 2 inches, that leaves a lot of room to work with when changing to an automotive piston and stroked crank.  also big block chevy valves can be used in the head and are slightly larger.  my problem is figuring out how far the crank can go without block mods and or breaking crank and which rod to use.  i have not found UM engine deck height listed anywhere, it makes desktop engine building tough Big smile
Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20

Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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ALinIL View Drop Down
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Joined: 20 Sep 2009
Location: Frankfort, IL
Points: 316 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ALinIL Quote  Post ReplyReply Direct Link To This Post Posted: 08 Feb 2013 at 12:22pm
CAL  -  My brother is currently doing a engine rebuild on a UC Thompson(has 36" rubber).  Is using the MM pistons with new Darton sleeves.  I do not know the deck height, but he did cc the head and the compression ratio is now about 7.5:1.  Used the stock rods and only had to rebore for the wrist pins.  He is not using it for pulling, just for show and occasional plowing.
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