Cant speed question

Admin Administrator Posts: 1,950	Cant speed question Jan 4, 2016 22:38:09 GMT -7 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Admin on Jan 4, 2016 22:38:09 GMT -7 So I'm building a car and the rules say wheels must sit flat. I have never built a car with this rule and I'm wondering what the speed difference is a 1.0deg cant, verse a 3.0deg cant? Has any one ever done any testing?

Bulldog Racing Rookie of the Year Posts: 281	Cant speed question Jan 5, 2016 2:14:11 GMT -7 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Bulldog Racing on Jan 5, 2016 2:14:11 GMT -7 Good question, I'm not sure? I look forward to the answer here.
	-Bulldog-

B_Regal Racing
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Still searching for that last 1/100th of a second

Posts: 426

Cant speed question Jan 5, 2016 8:21:42 GMT -7

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Post by B_Regal Racing on Jan 5, 2016 8:21:42 GMT -7

Less than 3 degrees, the car becomes unstable and the rear wiggles (at least how I typically weight cars). I've tried less cant in an effort to become faster, which did not pan out, but I have never tried to account for the instability with a weight adjustment. I have read more than 3 degrees slows the car down (which was why I tried to go less than 3), but I am not a good enough builder to prove more than 3 is slower (but I have tried that as well). So I just run the typical 3. I would guess any cant is better than none at all.

Last Edit: Jan 5, 2016 8:22:48 GMT -7 by B_Regal Racing

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BRACKETRACER
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Cant speed question Jan 5, 2016 19:39:52 GMT -7

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Post by BRACKETRACER on Jan 5, 2016 19:39:52 GMT -7

Depending on how much slop you have in the wheel bore to the axle, you can bump up the cant to 1.5, maybe 2 degrees and still have the wheels sit flat on a table. When the car is rolling they will still tip up. Personally, I like to run the smallest wheel bores I can if we have to run box stock axles and cant 1 degree if the rule says the wheels have to sit flat. You'll get some wobble in the back like bregal said but as long as a rear wheel doesn't hit the rail you'll be fine. Might want to move to a slightly less aggressive COM. If you're allowed to run aftermarket axles it would help.

Never tried this before but this year I had my son leave the ridges on the axle shafts and just polish them up. We're going to turn the axle so those bumps are fore and aft and see if we can get some more stability. If it doesn't help he can just polish them off before the race.

Pony Express
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Cant speed question Jan 5, 2016 22:25:00 GMT -7

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Post by Pony Express on Jan 5, 2016 22:25:00 GMT -7

In the old days you could cut the wheels so there as a ridge in the middle of a uncanted wheel and those cars were faster than canted wheeled cars, but somewhere along the line they outlawed that cut and now we're all stuck going slower cars with canted wheels, but flat tread. Rules always are written to slow cars down even in our league.

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Cant speed question

Post by Admin on Jan 4, 2016 22:38:09 GMT -7

Post by Bulldog Racing on Jan 5, 2016 2:14:11 GMT -7

Post by B_Regal Racing on Jan 5, 2016 8:21:42 GMT -7

Post by BRACKETRACER on Jan 5, 2016 19:39:52 GMT -7

Post by Pony Express on Jan 5, 2016 22:25:00 GMT -7

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