Camber setting

JIM SILVERHEELS · Posted: Sun Jan 06, 2013 5:05 pm Post subject: Camber setting

With softer tires more negative caster is used, more grip with em making them flex over more ? Kinda obvious, but I thought I would ask, thanks.
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TJ Koyen · Joined: 03 Oct 2004 Posts: 1453

Are you talking caster or camber?
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Jim McMahon · Posted: Sun Jan 06, 2013 6:20 pm Post subject:

There's no hard and fast rule. Softer compounds can have stiffer sidewalls.
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JIM SILVERHEELS · Posted: Sun Jan 06, 2013 6:51 pm Post subject: CAMBER

TJ, talking about camber. Noticed in the new Arrow x-2 CIK setup guide they say more negative camber with the softer tires. BTW yer a very smart young man from reading your posts. Gonna look you up at Kershaw if you go in April.
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TJ Koyen · Joined: 03 Oct 2004 Posts: 1453

JIM SILVERHEELS · Posted: Mon Jan 07, 2013 4:18 am Post subject: THANKS

Thanks TJ, someone did their studies. All set now.
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Dan Haynes · Posted: Mon Jan 07, 2013 5:55 am Post subject:

Jim,
That is pretty common with the Arrow karts, as I suspect with most brands. Positive camber will generate more positive steering and more front bite. Generally as grip goes up, your camber setting gets lower. We will often start the day off with a little positive camber and by the end of the day when the track is gripped up we will be running a little negative camber. This is with the YLC's but I suspect most tires will react similarly, albeit to different degrees, as was stated.
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Greg Lindahl · Joined: 13 Jan 2011 Posts: 271

Temperature and wear accross the face of the tire will "tell" you much about what the tire "wants". You may "sacrifice" tires for maximum performance, if you have the resources to replace tires more often than you would by focusing on balanced wear.
Testing and resources are your friends.

Chris Livengood · Posted: Mon Jan 07, 2013 12:48 pm Post subject:

Positive camber creates a driver perception of more direct initial turn-in as a result of camber thrust. As karts complete the very initial phase of turning using almost exclusively the inside front tire and a positively cambered inside tire is leaning towards the inside of the track, the feeling a driver receives is of faster turn-in. A lot like a motorcycle that is leaning will automatically drive towards the center of the corner.

The opposite is true for negative camber.

Typical camber changes (those made with pill style adjusters) also bring about changes to kingpin inclination, but that's almost another topic all together. Though, as with all things in karting, you can't truly understand the parts until they are in the context of the system.
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Greg Wilkinson · Posted: Mon Jan 07, 2013 2:52 pm Post subject:

Am I right in assuming you guys say 0 degree camber you mean kart on the ground with driver (using sniper lazers) ? We don't get to race much and I've had her Tag Kosmic T-11 set up; YLB tires, full caster (top & bottom 20 pos pills), 2 mm front bar in (she has never liked the front bar out) 54 1/2" to 54 3/4"rear width w med hubs. and to get O degree camber on the ground, have to set top pills 2 hole positions to the positive side. 44 % front weight. And she still said it won't go where she points it. So I let our fast guy drive it one day and he came in and said turn in was lazy. Talked about it and he said to try 2 degree negitive (on the ground w driver in). Next weekend out she loved it. Now the tire wear is not even across the fronts and his comment was "you wanna go fast or good tire wear".
I guess what I'm trying to say is I always thought that if you were getting even wear across front tires you were getting max grip. Aparently I was Wrong.
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JIM SILVERHEELS · Posted: Mon Jan 07, 2013 4:38 pm Post subject: GREG

Greg, I always set the camber to get even wear across the tires and one day at ncmp we got stomped by a guy who only used half his front tire and his car flew. If your car isn't go where she turned it, it was pushing?
Some say putting negative camber in will let the chassis flex over more lifting the inside rear more. Adding more positive camber should push the inside tire down farther making the opposite rear wheel dig in more lifting the opposite inside wheel more, shouldn't it? I read stuff by so called experts who say 180 degrees from each other.
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TJ Koyen · Joined: 03 Oct 2004 Posts: 1453