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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Super 77 gas

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D-Day

06-14-2006 18:07:19




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I need some tips on how to squeeze more horsepower out of a Super 77 gas. It has a Zenith carb, runs on Turbo Blue race gas, and will turn 3000 RPM. Thanks in advance for any tips.




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t.r.y.

06-21-2006 18:34:48




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 Re: Super 77 gas in reply to D-Day, 06-14-2006 18:07:19  
Who does a low rpm cam grind?? I'm from pa. I have a 77 and would be interested in getting one ground. thanks



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OliverRon

06-16-2006 08:36:23




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 Re: Super 77 gas in reply to D-Day, 06-14-2006 18:07:19  
What is the purpose for more power? If tractor pulling, a fairly inexpensive change is a low rpm grind on the camshaft. This will give it more torque at the bottom end of the rpms. Of course, this is assuming it is not the "Hot Farm" tractors. Porting and polishing the head is all cool, if it is a high rpm application. But getting more torque, or lug, at the end of the pull in a traditional tractor pull, the cam will give you more fun for the dollar spent.

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WFE 2

06-14-2006 21:12:22




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 Re: Super 77 gas in reply to D-Day, 06-14-2006 18:07:19  
What have you done to boost compression? Burning that expensive high octane fuel isn't doing any good without the higher compression ratio to utilize it. Have you enlarged the bore, shaved the head, or increased the stroke of the motor? Having the ports aligned and enlarged in the head, and using a larger carburetor and intake manifold will help.



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D-Day

06-15-2006 13:04:57




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 Re: Super 77 gas in reply to WFE 2, 06-14-2006 21:12:22  
I'm not sure what all has been done to the engine, but I suspect it is about the same as a stock 88 engine in terms of what kind of power it makes. I have not talked to the guy that put the engine together.



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770

06-15-2006 13:26:59




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 Re: Super 77 gas in reply to D-Day, 06-15-2006 13:04:57  
pump gas is all you need for a stock engine.



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