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Old 06-23-2009, 06:38 AM   #1
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Default Tire Split Theory

Hey guys, I have been trying to understand the theory behind the split we make between tires. My question is, do I make my tire split to have equal front-rear drive with the current internal ratio my car has, or do I give a % to have more front drive or more rear drive.
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Old 06-23-2009, 06:46 AM   #2
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all your answer will be solved once you download the serpent drive ratio calculator... go to the serpent site and download it and everything will become crystal clear...
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Old 06-23-2009, 06:47 AM   #3
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all your answer will be solved once you download the serpent drive ratio calculator... go to the serpent site and download it and everything will become crystal clear...
Yes, I have used it. But in a part of the calculator, you can choose between having equal front-rear drive or having a % for either. Hence why my question. Do I want equal front-rear drive, or more rear or more front? And what is the effect between the 3?
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Old 06-23-2009, 06:59 AM   #4
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concerning your questions the answer is simple, it depends on track layout and driving style, in my home towns track i use one on one drive ratio and after some tire wear i have more rear drive but car handles great but last week that went racing at another place i use more front drive... hope this help
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Old 06-23-2009, 09:19 AM   #5
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Quote:
Originally Posted by Riketsu View Post
Yes, I have used it. But in a part of the calculator, you can choose between having equal front-rear drive or having a % for either. Hence why my question. Do I want equal front-rear drive, or more rear or more front? And what is the effect between the 3?
It's more complicated with different tire sizes. For explaination consider that front and rear tires are same diameter.

If you have more rear drive, then there will be more turns of the rear tires than the front over a given set distance. For example, 10 turns of the rear tires for every 9 turns of the front. But both front and rear have to arrive at the end point at the same time. Therefore the rear are (over) driving the front tires. At the extremes you could have a 1:1 drive ratio or 2 wheel drive to the rear wheels.
The effect of rear over drive is over steer. With the "proper" amount the back end checks out a few degrees and the power not only drives you foreward but also to the inside of the turn i.e. faster cornering.
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