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Tractor Talk Discussion Forum

Oliver Super 55

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Matt Kane

05-13-2006 16:43:58




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I have just had my super 55 rebuilt. The old 55 motor was shot so they replaced the 55 motor with a later 550 diesel motor. They have also used the 3 3/4 big bore kit on rebuilding. I was wondering round a bout what the horsepower would be now??




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Super 55

05-14-2006 12:13:39




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 Re: Oliver Super 55 in reply to Matt Kane, 05-13-2006 16:43:58  
Yeah, the diesel is listed at 39.21



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oliver fan

05-13-2006 19:23:54




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 Re: Oliver Super 55 in reply to Matt Kane, 05-13-2006 16:43:58  
The gas was 41. The diesel is about the same.



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Matt Kane

05-14-2006 12:33:18




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 Re: Oliver Super 55 in reply to oliver fan, 05-13-2006 19:23:54  
Even with a bigger bore? I know the factory horsepower, but I had the shop install a big bore kit. 1/8 inch bigger than the stock 550



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oliver fan

05-14-2006 12:42:46




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 Re: Oliver Super 55 in reply to Matt Kane, 05-14-2006 12:33:18  
The horsepower we listed is with 3 5/8 sleeves and pistions, as tested in Nebraska.

There is no listing for 3 3/4, so you will have to find out after you have it broke in, and tell us.



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Matt Kane

05-14-2006 13:15:43




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 Re: Oliver Super 55 in reply to oliver fan, 05-14-2006 12:42:46  
Well the people who rebuilt it said from 45 to 50 horsepower, But I wanted to verify it.



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