Re: Lookin fior Chad

Posted by ChadS on December 24, 2005 at 12:11:55 from (66.228.96.222):

In Reply to: Re: Lookin fior Chad posted by the tractor vet on December 24, 2005 at 07:12:29:

Ive got one of those distributor testers,, Its made by SUN. Some of the racing tech kinda works, but kinda dont, depends on what your doing with the engine, work, or play,,,,, Your exactly correct about lost arts,,, From what we have all learned over the years has told us the differences in what certain designs were intended for use, what works, and what dont,,, Really, in racing, and pulling, there is 2 common goals, to get the rpm up as quickly as possible, in the cars,, its getting the rpm peak back up to the shift points after you shift gears. Pullers, they need to get the rpms up and hold it there steady, preferably, under a load, on autos, the rpms are increasing all the time,,, where on tractors set up for pulling the rpms will be the opposite, and be a progressive drop in rpm as the load gets heavier requiring more power and torque from the engine. On the advance weights,, in the tractors,, usually on farm tractors used for farming, as long as it is in good working mechanical order, modifications are not that important. On pullers, you have factors that differ from how the engine would operate in the field, it comes down to engine control responce time on pulling tracks. The responce times are different VS a farm engine, sure, you may think that they are simular, but in truth, they are much different. Most commonly practiced in performance, is improving reaction times, What we are trying to do is be able to accelerate as fast as it can, hold the torque longer, make horsepower, and do either, make a car go faster, or make a tractor pull farther. On a pulling track with these ol Faramlls, Ive learned that if the responce times are slow, so will be your trip down the track, and usually much shorter that you wish to expect. Every upgrade, has a reason to be changed for a certain gain. Here is what we are trying to do,,, on a puller, On lower hp engines, we have to get the rpms up as quickly as we can, because in a few seconds, a load will be applied on the engine, slowly brining it back down,, we want to hold it there as long as we can, and the only way would be to utilize the best force going for these engines. Centrifugal force. Anytime you can speed up the time it takes for the force to start and reach peak momentum, the more torque the force will have. on these tractors, they are restricted by the use of momentum stopping parts, like heavy mechanical advance springs, and lightweight governor springs. These parts are the main reason why these IH farm tractors dont pull well on a pulling track, but do amazing well in the fields. Where in farming, slow and consistant is best, but pulling requires fast and consistant. Cause, when pulling a plow or a disk, dont kill the engine, well it does occasionally when you hit the tough spots,, but not all the time,,, the pulling track is enevitable, your coming to a stop, either spin out from too much power, or running out of power. If you have a good powered engine on a pulling track,, and suddenly hit a tough spot, if the engine controls are not sesitive enough to change to compensate, even though the engine is strong,, the sudden drop can actually stall the engine faster, because no engine controls respond fast enough to compensate. When you speed up the reaction time, or sensitivity, when that drop occurs, the engine controls will be sensitive enough to respond. Instead of just sitting there and not responding. Resulting in the rpm not recovering and not make it through a tough spot on a pulling track. BUT, when you give the power a chance to work, you will see that the rpm will come back up to where ever you set the peak rpm to, or where you have the throttle set. the main objective here is to maintain rpm. Vet, it is a science! its dying as we go electronic! But we do it old school, dont we? CHadS

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