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More Questions on Pulling Tips

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george

07-17-2001 21:59:06




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I'm abit confused by some of the information posted on the last few links; I thought less tire pressure provided more traction, as it let the tire contact patch increase in size so more lugs can bite the ground, thereby reducing the load on the ground per lug. Also, as rear squats, weight will transfer to the rear axle. Am I wrong? Or is it a case of more is not better (or less in this case; ie, there is an optimal pressure that may not be as low as you dare go? Also, is it better to get weight from fluid in the tire, or cast weight? Why is a shorter drawbar better? I know you folks don't want to give away all the secrets, but any tidbits are much appreciated to a newbie like me. Thanks in advance.

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George

07-25-2001 21:25:02




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 Re: More Questions on Pulling Tips in reply to george, 07-17-2001 21:59:06  
Thanks for all the comments, guys. I really appreciate it, and will bump up the pressure!!



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Greg H.

07-19-2001 09:56:36




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 Re: More Questions on Pulling Tips in reply to george, 07-17-2001 21:59:06  
George,
the fella's below arn't fibbing. Too little air is probobly worse than too much. I pull in heavier classes, 9,000 and 10,000 pound, but up until recently I only had 6 ply tires on the back. what would happen is that while my balance was near perfect{just starting to loose stearing on the end of the pull}, my tires would squat down even with 15 or 16 pounds of air in them, resulting in a loss of drawbar, and I'd spin out. I would look down and see them flattening out, and I knew that even though I still had good momentum in 2nd gear I was about to spin out, and I would. Now I'm going to 8 plys and a size bigger, and I hope I wil be able to improve, but all I have learned in the past few years is not to loose draw bar, stay out of the holes, and work on the balance. With stock tractors technique really counts. Good Luck George, Greg H.

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SteveV

07-18-2001 19:23:31




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 Re: More Questions on Pulling Tips in reply to george, 07-17-2001 21:59:06  
Have someone watch your tires...a slight "crinkle"
at the end is a good thing...a major "crinkle" is a bad thing. Don't start "crinkling" half way through the pull. Just my opinion.



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Dick

07-17-2001 23:44:35




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 Re: More Questions on Pulling Tips in reply to george, 07-17-2001 21:59:06  
George, We ran this to death a month or so ago but we can kill it some more. There is one ideal pressure on a given track for your tires to work. It is generally not a low pressure of inflation. It is around 13 psi. Going alot lower than that the drawbar is lowered when the tire squats and then weight transfer is lost, hence less pull. The dynamic weight on the rear tires when the front is being carried is quite significant, so air pressure has to be present in tire to carry the load. Your turn Burns.

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dave

07-18-2001 14:45:29




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 Re: Re: More Questions on Pulling Tips in reply to Dick, 07-17-2001 23:44:35  
any lower than 13 to 15 starts to take alot of your power. the newer or softer your tire the worse it is. especially at the start, to much squat will also bring your front end upto easilyat the start thus having to be wieghted more than needed



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