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custom pistons

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=195219
Printed Date: 13 Jul 2024 at 5:36am
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Topic: custom pistons
Posted By: JamesP
Subject: custom pistons
Date Posted: 18 May 2023 at 4:08am
Any suggestions on where to get pistons made? Model UC, thanks



Replies:
Posted By: injpumpEd
Date Posted: 18 May 2023 at 7:37am
Not sure they can make all pistons, but EGGE makes some custom pistons for really old engines. 

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!


Posted By: CAL(KS)
Date Posted: 18 May 2023 at 8:17am
I spoke with Dan Karpel @ Crank Machine service a few years ago about pistons for a UC after he did a crank for me and he had a source.  He suggested making a fiberglass resin cast of the head chamber to give most accurate shape for best dome configuration.  Life has gotten in the way and i have yet to do it. Id be interested in doubling your order depending on what you go with, if you decide to roll with it.  I guess we have talked this over James,  but dont remember if i ever got you the contact info



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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


Posted By: JamesP
Date Posted: 20 May 2023 at 3:37pm
Hey Cal, I am sending one of my pistons to extreme tractor parts-Ray.
I ended up having my sleeves bored .030 over. I am having  .500 added to 
compression ht. This will be 7-1 CR and the piston will be  .060 below the 
spark plug hole so it wont require any features on top. Calculates show hp
around 65. Plenty for me, I am not competing just want enough that it never
powers out on the fun pulls and I can still hand crank it-- LOL.

I am only guessing but with your stroke, it would push the piston up enough to
gain a lot more compression plus CI. You could buy new sleeves and rings and 
run stock pistons.?? 


Posted By: NEVER green
Date Posted: 21 May 2023 at 9:37am

  Check Ross,  and Diamond.


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2-8050 1-7080 6080 D-19 modelE & A 7040   R50       


Posted By: CAL(KS)
Date Posted: 22 May 2023 at 7:35am
Originally posted by JamesP JamesP wrote:

Hey Cal, I am sending one of my pistons to extreme tractor parts-Ray.
I ended up having my sleeves bored .030 over. I am having  .500 added to 
compression ht. This will be 7-1 CR and the piston will be  .060 below the 
spark plug hole so it wont require any features on top. Calculates show hp
around 65. Plenty for me, I am not competing just want enough that it never
powers out on the fun pulls and I can still hand crank it-- LOL.

I am only guessing but with your stroke, it would push the piston up enough to
gain a lot more compression plus CI. You could buy new sleeves and rings and 
run stock pistons.?? 
  yeah i have to run short bbc style piston just to keep the rings in the sleeve with the stroke and custom rods i have.  Was going to run 4.625 bore as can be done without machine work on block, so will be 445 cubes if i ever get it done.  being a UM engine im in uncharted territory but i dont really have the finances to be a guinea pig lol.   if im going to do something i just as well make it a worth while though....

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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


Posted By: cms
Date Posted: 25 May 2023 at 9:52am
Can help with custom pistons.
Dan Karpel



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