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Allis Chalmers Discussion Forum

Grade of fuel

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Andrew Z

06-17-2005 13:49:50

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I am pulling a Allis B and was wondering if anyone else uses high octane fuel to get more power? Does the high octane yeild to better performace??
Thanks Andrew

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Doug in OR

06-18-2005 09:22:59

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 Re: Grade of fuel in reply to Andrew Z , 06-17-2005 13:49:50  
For more HP, you want a higher energy gasoline. This is not the same as high octane gasoline. Some gasolines have 110,000 BTU/gal .. some have up to 114,000 MBTU/gal. You will generally find higher energy gasoline sold during the summer months. As to who has the higher energy gasoline, that is anyone's guess. I suppose a case can be made for racing gasoline. The problem is that you never know what you are getting. The oil companies will not tell you.

BTW, I suspect that you will see little additional HP from the lower energy gasolines versus the better ones.

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06-17-2005 23:07:52

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 Re: Grade of fuel in reply to Andrew Z , 06-17-2005 13:49:50  
Ditto... higher octane fights pre-ignition... ping/spark knock.. on a low compression engine.. it's not doing anything tangible except spending money faster... unless you can get the compression up.. like shaved heads.. dome pistons... etc.

Course when it comes to hot rodding.. 2 sayings come to mind: "There is no replacement for displacement ( nothing like CI's )".. and "How fast is your wallet?"


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Tramway Guy

06-17-2005 16:14:53

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 Re: Grade of fuel in reply to Andrew Z , 06-17-2005 13:49:50  
Generally, no; not unless you have higher compression to utilize the higher octane.

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Andrew Z

06-18-2005 03:36:51

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 Re: Grade of fuel in reply to Tramway Guy, 06-17-2005 16:14:53  
Thanks guys

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