Tested Horsepower of U or UC
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=133288
Printed Date: 09 Jun 2025 at 12:50pm
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Topic: Tested Horsepower of U or UC
Posted By: Farrell(Utah)
Subject: Tested Horsepower of U or UC
Date Posted: 01 Jan 2017 at 10:18pm
Has anyone ever put a stock U or UC on a dyno? I keep thinking that they had more power than reported on the Nebraska Tests. Thanks.
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A(1937), 2 G, 2 WD45 diesels, 6 WD45 gas, UC, 2 WD, D17 gas, WF, Farmall 400, D12, Kubota B3030
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Replies:
Posted By: CALEBnOK
Date Posted: 01 Jan 2017 at 11:46pm
Uc had more draw bar pull with continental than um engine.
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Posted By: 45 turboa-
Date Posted: 02 Jan 2017 at 12:32pm
Our UC 52 hp. Hi compression pistols 1/8 shaved off head.
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turbocharged
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Posted By: Harold (MID MI)
Date Posted: 02 Jan 2017 at 3:58pm
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Our 37 U tested out at 38 HP on the dyno at last years show.
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Posted By: Farrell(Utah)
Date Posted: 02 Jan 2017 at 4:36pm
Thanks. I assume the U was stock. Were the high compression pistons in the UC stock or some you had modified? My UC has 14.9X30 tires on it so it tends to power-out when I pull it at our club pulls. Of course it scoots right along in first gear with those big tires. Even though the engine is in good shape, maybe some shaved off the head would make it spunkier.
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A(1937), 2 G, 2 WD45 diesels, 6 WD45 gas, UC, 2 WD, D17 gas, WF, Farmall 400, D12, Kubota B3030
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Posted By: 45 turboa-
Date Posted: 02 Jan 2017 at 6:48pm
The pistons in our UC are cast iron the pistons I took out came about 3/8 below the top of the sleeves the ones in there now are about 3/8 above the sleeves + I had .125 thou. off of the head it is a bear to pull over tdc. The tractor belongs to my son now he has kindof lost interest but I would like to put aluminum pistons w/ even higher compession i think they would have to be made.
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turbocharged
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Posted By: Norm Meinert
Date Posted: 03 Jan 2017 at 10:31pm
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I have a set of alum. pistons that are above the top of the block. they are new.
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