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Tractor Talk Discussion Forum

Stepped or Flat-top Pistons?

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48C-MAN

08-02-2006 07:45:02




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Getting ready to put the parts to the restoration of my grandfathers 48 Farmall C and was wondering if I should go with flat top or stepped head pistons? I have noticed that the price is almost the same.




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Gary in Mozarks

08-02-2006 08:56:46




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 Re: Stepped or Flat-top Pistons? in reply to 48C-MAN, 08-02-2006 07:45:02  
what is the compression with the flat top pistons? something in the neighborhood of 6:1? From what I have read, most modern fuels (gas and or alcohol mixed) and do better with a little higher compression and you always have the option of backing off the timing a little if it gets warm makes it start easy too.



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48C-MAN

08-02-2006 09:02:08




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 Re: Stepped or Flat-top Pistons? in reply to Gary in Mozarks , 08-02-2006 08:56:46  
Sounds like a good idea.



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the tractor vet

08-02-2006 08:17:24




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 Re: Stepped or Flat-top Pistons? in reply to 48C-MAN, 08-02-2006 07:45:02  
Go with the step head , go for all the power ya can get.



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Mike M

08-02-2006 08:17:18




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 Re: Stepped or Flat-top Pistons? in reply to 48C-MAN, 08-02-2006 07:45:02  
I overhauled one of those and was told that if I had the model without the water pump not to go to the high compression pistons or else overheating would become a problem.So if you have a water pump you may be able to use the high compression ones.



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48C-MAN

08-02-2006 08:49:33




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 Re: Stepped or Flat-top Pistons? in reply to Mike M, 08-02-2006 08:17:18  
In regards to the overheating I was told to make sure that the head gasket is for a C and not a Super C due to the size of the coolant passages. They are smaller in the Super C because they have a water pump. I was also planning on running Engine Ice coolant after the rebuild to help dissapate the heat better.



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