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Dyno vs. speed limit

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don

05-16-2003 04:39:37




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Looking for insight, Don't want a war. which is the better way to keep it fair for stock class tractors? (i think the guy with the 600 cid oliver should go fast) but for a true stock class, What's the best way to keep the hotter tractors out? We are already at 16.9 max/no cuts. thanks much, don




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Don

05-26-2003 05:07:58




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 Re: Dyno vs. speed limit in reply to don, 05-16-2003 04:39:37  
Thanks for your input.



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Puller504

05-17-2003 20:18:41




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 Re: Dyno vs. speed limit in reply to don, 05-16-2003 04:39:37  
The county south of us tried a speed limit pace tractor for a few years. Hot rides would just lay off the throttle and pour the coal on later in the run. We use a dyno and measure for peak HP. Another county southwest of us uses no speed or HP limit rules at all! (They do say no water injection though.) And no turbo's on gas tractors! A few innovative folks down there are pushing 400Hp and amazing tire speed down the track. These folks are asking for trouble IMHO. I have watched some pretty squirrelly runs with no safety equipment used whatsoever! Have actually seen baler twine tied to the governor on an Oliver gas tractor. Sooner or later something's gonna give. Hope no one gets hurt!

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puller2

05-20-2003 16:13:06




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 Re: Re: Dyno vs. speed limit in reply to Puller504, 05-17-2003 20:18:41  
we like a pull thta has a pace deal and it has a smaller wheel 20ft. behind it, and you CANT fall behind it or ur dqed..and u can't touch the flag in front of it..so..it's pretty fair..no tire size limit..or rpm limit..and we have mopped up w/a 56hp JD A and we pull against 100hp U's and M's.



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missery

05-17-2003 05:26:14




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 Re: Dyno vs. speed limit in reply to don, 05-16-2003 04:39:37  
in most any motor ,there is always a control.this being said,in our club, we have an rpm rule.nothin over 700 max.keeps those high turnig machine tame. seems to work well for us.



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PULLER

05-16-2003 19:38:53




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 Re: Dyno vs. speed limit in reply to don, 05-16-2003 04:39:37  
I pull with a club that has a speed limit of three MPH and max tire of 14-9,15-5 and stock RPM ,PLUS we have HP limits for each class,I CAN NOT GET IT THROUGH THERE HEADS THAT YOU DO NOT NEED HP LIMITS WITH SPEED AND TIRE LIMITS,If for the sake of it,you have a tractor with 70hp pulling with a tractor that has 100hp if they both have the same tire size and have to go no faster than 3mph while running STOCK RPM,the one that knows how to read the track and place the weights will do the best!! and just to give you something to think about my tractor makes 90HP "BELOW" the rated PTO speed,Im always legal at my setting of 540,,,,YES you can BEAT the DYNO!!!

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BUSH

05-24-2003 22:41:13




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 Re: Re: Dyno vs. speed limit in reply to PULLER, 05-16-2003 19:38:53  
in our club in east tn stock pulls stock mod. you pull what you bring what ever speed or gear you want



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Jim

05-16-2003 13:20:38




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 Re: Dyno vs. speed limit in reply to don, 05-16-2003 04:39:37  
Our pulling club in Eastern Iowa has set a speed limit and a standard oem rpm requirement. Pretty well takes care of itself. The farm stock can have no cut tires and must pull in 1st gear. Your comments are welcome.



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WTW

05-16-2003 11:33:50




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 Re: Dyno vs. speed limit in reply to don, 05-16-2003 04:39:37  
Been pulling for many years with many organizations and the fairest way to level competition is to regulating ground speed with an automated device on the sled, NOT A PACE TRACTOR or a dyno!! Anywhere there is human involvement the fair game concept is lost. Anyone capable of building HP is capable of fooling a dyno as well. You don't have to worry about who has the most power or what gear it is in because no one single tractor will ever go faster at any one moment going down the track than what the set speed limit is set at. If every tractor can only go so fast it really levels the playing field. The most important thing to be competitive in these paced classes (other than knowing how to pull) is that you need a tractor strong enough to pull the sled the maximum speed allowed and be able to hold this speed consistently the whole length of the track. Once you have meet that criteria all the extra power that the money dogs want to poor into there tractors actually can hurt them more in a paced class than it will help them. If more allowance is needed for so called more stock or slower tractors slow the limit down some more or vise versa. I have found if you offer open classes with the pace classes the hot tractors will want to pull the open to show of there power. Some organizations even limit the tractors to pull in one type of class either paced or open. The best programs is have different classes for different types of pulling and strict rules that ARE enforced. A important fact on this subject is to remember: There is no way to regulate what is so called stock but there is a way to regulate speed. Good Luck Dave W.

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Dave

05-16-2003 11:13:35




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 Re: Dyno vs. speed limit in reply to don, 05-16-2003 04:39:37  
How about 1st gear with a 3mph speed limit?? No cut tires, no tires bigger than 14.9x38 up to 5500#, no tires bigger than 16.9x38 up to 8500# and 18.4x38 tires after that?????



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a puller

05-16-2003 11:17:49




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 Re: Re: Dyno vs. speed limit in reply to Dave, 05-16-2003 11:13:35  
dont' have a tire size limit...just a speed limit. I feel any tires should be allowed cause if you can't beat them, join them!



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Mfarmallpuller

05-16-2003 09:49:16




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 Re: Dyno vs. speed limit in reply to don, 05-16-2003 04:39:37  
yeah the speed limit is a good way cause it makes some of the higher horse power tractors look even worse , I beat a 4020 John Deere in a speed limit pull. The 4020 had all kinds of work done but he couldn't get enough RPMs to spool the turbo or keep the engine alive.



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Tim

05-16-2003 04:53:37




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 Re: Dyno vs. speed limit in reply to don, 05-16-2003 04:39:37  
I think a speed limit makes more sense. Those high horse tractors either have to go fast or heavy to put that power on the ground.



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G Taylor

05-16-2003 10:09:51




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 Re: Re: Dyno vs. speed limit in reply to Tim, 05-16-2003 04:53:37  
Agree, speed limit alarm on the sled.



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Jerry

05-17-2003 12:50:51




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 Re: Re: Re: Dyno vs. speed limit in reply to G Taylor, 05-16-2003 10:09:51  
The speed limit is the way to go but the stronger tractors can build rpm,s to keep up with the limit whereas the lower hp tractor lose rpm,s and ground speed.



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Jim M

05-17-2003 18:11:10




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 Re: Re: Re: Re: Dyno vs. speed limit in reply to Jerry, 05-17-2003 12:50:51  
I've noticed the high horsepower tractor start out with low RPMs in a higher gear and after the load increases they pour the coal to them and get the tires spinning alot and stay under the speed limit but RPMs and horsepower are a real advantage. A dyno and rpm limit and a speed limit would really even the field



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G Taylor

05-17-2003 19:41:06




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 Re: Re: Re: Re: Re: Dyno vs. speed limit in reply to Jim M, 05-17-2003 18:11:10  
The addition of the dyno would be better but it takes time & money. The extra wheel speed late in the pull help on loose limestone tracks. No significant advantage on the sticky clay tracks around here. The tires never spin except for the last foot or two travel.Sometimes the engine stalls and tractor never spunout.



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