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Tractor Pulling Discussion Forum

Super H with 8000 Foot Hight Altitude Engine

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Carp

08-28-2006 08:54:31




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I am planning to get into some pulling late this year. I have a few tractors, but have decided to use my Super H to pull with. It came factory equiped with the 8000 ft high altitude set up. I would like to pull it in the stock class or A class. It is first gear only stock rpm. Most likely pull it in 4500 lb and maybe up to 5500 lb. My question is will this engine with the High Altitude set up be competetive in a stock class and what are the differences between it and the regular gas engine?

Thanks

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jhb

09-02-2006 13:13:29




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 Re: Super H with 8000 Foot Hight Altitude Engine in reply to Carp, 08-28-2006 08:54:31  
Tough for any H or Super H to beat a good M. It is easy for a M to be 5000 lbs and they pull very well in the 5500.



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randy hall

08-28-2006 13:24:43




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 Re: Super H with 8000 Foot Hight Altitude Engine in reply to Carp, 08-28-2006 08:54:31  
the 8000' option had a larger step on the pistons than the 5000' option and the standard ones were flat. i know back in the early seventies when i started farming we overhauled my 'm' with tractor supply 8000' pistons and never used anything but regular gas in it. but back then regular was 91 octane. these tractors were originally designed to run on 70 octane gas.



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J2

08-28-2006 09:15:51




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 Re: Super H with 8000 Foot Hight Altitude Engine in reply to Carp, 08-28-2006 08:54:31  
The difference is the pistons.. HA pistons have a higher compression ratio(but I don"t know what it was). You could do a compression test to see what psi you get and compare it to standard. And you might need to use higher octane gasoline when using it at sea level... Some mixture adjustments may also be necessary to get max power... J2



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