Occasional Track Alignment - Caster/Camber Qs

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Jun 9, 2015 | 05:06 PM
  #1  
Seeking advice on a streetbable alignment (5-6k a year), not too concerned about excessive wear as it is a car I drive mainly for fun. Tires are still staggered (225/255), going with something better than Evo2 (K120s) ie. RS-3s, AD08R etc.

In terms of track wear with 1 deg. camber up front I did find the outer shoulder to roll over and wear more. Does anyone suggest any guideline? Should the rear camber be more than the front to maintain how the UK alignment is?

I realize many maximize the caster on a stock car to get the most neg camber from it. My car has coilovers at the moment - is there any benefit to more caster if I am able to pull enough camber anyways?
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Jun 11, 2015 | 07:44 AM
  #2  
Im in similar boat as you, do track but also drive the car about 6k a year.

My current alignment is

-2.4 Camber Front
0 Toe front
5 Caster Front

-2.2 Camber Rear
1/8th total toe rear(which next time will go to 1/16th total)
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Jun 11, 2015 | 06:33 PM
  #3  
Quote: Im in similar boat as you, do track but also drive the car about 6k a year.

My current alignment is

-2.4 Camber Front
0 Toe front
5 Caster Front

-2.2 Camber Rear
1/8th total toe rear(which next time will go to 1/16th total)
Is there any benefit of running a higher caster?
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Jun 11, 2015 | 06:49 PM
  #4  
You can drive down the back straight with no hands?
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Jun 12, 2015 | 05:35 AM
  #5  
Positive Caster is when the steering axis is “in front of” the verticle. In a road car, this would mean that the top of the coilover would be pushed towards the rear of the car. Positive caster creates a lot of align torque (the force that straightens the steering wheel when you go forward) which improves straight line stability of the car. Due to the geometry of positive caster it also will increase negative camber gain (a good thing) when turning. As you increase positive caster the steering will get heavier also, but with modern power steering systems this is rarely a problem. Generally you want as much positive caster as you can reasonably get so long as the car is equipped with power steering.
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Jun 14, 2015 | 12:52 PM
  #6  
I minimize caster. The s2000 has tons of it. It can make the car's handling more unpredictable (the handling balance changes depending on steering angle). If you have enough static camber there's no reason to maximize caster. For me with a lowered car and j's s2 front camber joints minimized caster is about 6 degrees or high 5's.
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Jun 15, 2015 | 08:27 PM
  #7  
Quote: Positive Caster is when the steering axis is “in front of” the verticle. In a road car, this would mean that the top of the coilover would be pushed towards the rear of the car. Positive caster creates a lot of align torque (the force that straightens the steering wheel when you go forward) which improves straight line stability of the car. Due to the geometry of positive caster it also will increase negative camber gain (a good thing) when turning. As you increase positive caster the steering will get heavier also, but with modern power steering systems this is rarely a problem. Generally you want as much positive caster as you can reasonably get so long as the car is equipped with power steering.
Thank you! Very clear explanation.
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