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Tractor Pulling Discussion Forum

? on gasoline

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Ty

12-02-2003 05:02:43




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What do you guys run for pulling. From stock to modified. Regular cheap $hit, premium or the Super + expensive $hit? Alcohol is for operator use only! Does it make a large differance in power. Or add something to make it pretty potent. I plan on filling a tank full of the better stuff to see how it runs anyways just curious what everyone else does.




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JDGnut

12-02-2003 05:35:49




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 Re: ? on gasoline in reply to Ty, 12-02-2003 05:02:43  
Most run the higher octane fuels because of the higher compression engines... I usually run a mix of high octane fuel and pump gas... depending on the engine... If it doesn't need the high octane.. I don't use it.. Mainly as a cost factor... (Others have said there was no HP increase in using the higher octane when not needed.. but I have never dynoed to know for sure.) $5 gallon isn't cheap... but replacing a head gasket because you're too cheap to spend $5 a gallon isn't smart either.. You just have to try it for yourself and find out... Good Luck
JDGnut

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a puller

12-02-2003 06:27:09




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 Re: Re: ? on gasoline in reply to JDGnut, 12-02-2003 05:35:49  
the higher octane fuels burn harder so it defeats the purpose of it. If the tractor is set up with the right compression, a good 94 octane pump gas with some of that 104 octane booster is good. Got a cousin with a B that he runds some 100 or 104(blue) octane aircraft fuel in his tractor.



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88 puller

12-02-2003 08:48:50




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 Re: Re: Re: ? on gasoline in reply to a puller, 12-02-2003 06:27:09  
I have done a dyno test my motor went up 4 hp when I switched from 93 octane to 104. I use a special blend but it cost about $8.75 per gal. Its alot of money but my motor was not cheap.



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a puller

12-02-2003 10:07:42




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 Re: Re: Re: Re: ? on gasoline in reply to 88 puller, 12-02-2003 08:48:50  
where both the fuels unleaded? what about 110, or higher octanes vs. 87 or 93 or94 octane?



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88 puller

12-02-2003 12:51:20




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 Re: Re: Re: Re: Re: ? on gasoline in reply to a puller, 12-02-2003 10:07:42  
The 93 was unleaded and the 104 was leaded.



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chilled880

12-02-2003 16:30:47




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 Re: Re: Re: Re: Re: Re: ? on gasoline in reply to 88 puller, 12-02-2003 12:51:20  
where do you buy leaded gas? chilled



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buickanddeere

12-02-2003 18:02:32




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 Re: Re: Re: Re: Re: Re: Re: ? on gasoline in reply to chilled880, 12-02-2003 16:30:47  
If it knocks on aircraft 100 low lead at $3.00-$3.50 per gallon. The timing is too advanced, engine too hot, intake air too hot ,air/fuel mixture too lean or incandescent trash in the combustion chamber. Unleaded pump gas is lots for 90% of the engines out there.



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a puller

12-02-2003 19:00:48




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 Re: Re: Re: Re: Re: Re: Re: Re: ? on gasoline in reply to buickanddeere, 12-02-2003 18:02:32  
what if it does....we have an A that we cant run on 110 torco fuel..... .what is our problem?



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buickanddeere

12-03-2003 00:19:40




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: ? on gasoline in reply to a puller, 12-02-2003 19:00:48  
See the list above.



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a puller

12-03-2003 20:41:19




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: ? on gasol in reply to buickanddeere, 12-03-2003 00:19:40  
it doesn't matter how the timing is..it won't run on anything under 110 octane, and it sparkknocks when you hit the throttle....how many psi of compression do you think it has???



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ChadS

12-02-2003 20:03:05




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: ? on gasoline in reply to a puller, 12-02-2003 19:00:48  
What happens? does it knock? Usually you should be able to run any octane fuel in an engine,, been my belief,, Does it have shimmed rods or bearing rods? Chads



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a puller

12-03-2003 20:37:23




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: ? on gasol in reply to ChadS, 12-02-2003 20:03:05  
it has babbit rods. I have no idea on the cranking psi, it blew the compression tester right apart....



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ChadS

12-03-2003 20:52:54




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: ? on g in reply to a puller, 12-03-2003 20:37:23  
Nothing like firing 2 5 gallon buckets with over 300psi!! When it lugs,, does it sound like the diesils? Timing won't help that,, you are right,, it is a detonation,, Is the plugs still in the side of the block? And does the pistons go past the plugs? Had a freind who built a Big cubic inch A,, He had a problem with the knock in the engine,, He ended up getting a cyl head that was drilled out for the plugs to be, under or in the valve cover,, like a hemi,, and the knock stopped, The only explanation I could think of,, is that when the piston goes past the plug then the plug fires,, the flame front,, is on the sides of the piston,, patially,, and blowing the piston against the opposite side of the sleeve,, or block,, Ignition timing won't help one bit,, not enough advance to start the flame front before the piston reaches the plug,, Just my 2 cents,, ChadS

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a puller

12-04-2003 09:20:00




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: ? in reply to ChadS, 12-03-2003 20:52:54  
that could be the problem, I don't know for sure, but it probubally would run on diesel!! The plugs and everything are still the same. It does knock a little, but it misses when it lugs too. Were putting a different head on it that isn't milled as much so lessen the compression a bit....maybe it will help..... thanks



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buickanddeere

12-07-2003 06:22:01




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re in reply to a puller, 12-04-2003 09:20:00  
There come a point when more compression adds very little power. And the extra metal in the combustion chamber just impedes flame travel. Those pistons need angle milled on the plug side right down to 150 thou above the top ring. There maybe more power in a Heiser head or a bowl ported stocker with oversize nailhead intake valves. Than an milled down stock "A" head.



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ChadS

12-02-2003 17:46:45




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 Re: Re: Re: Re: Re: Re: Re: ? on gasoline in reply to chilled880, 12-02-2003 16:30:47  
Most VP racing fuels are leaded fuels,, C-12, C-16 are great fuels ChadS



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