I read that you run 2mm spacer on the inside of rear camber link and 3mm on the outside. Why this as opposed to just 1mm on the outside for the same amount of split? This is with the rear aluminum mount of course.

Chris Jarosz:Because that would be equivalent to running the hub link down on the plastic hubs (or at least similar). I prefer the higher overall link on the midmotor cars.

OK - that leads to a question that I have never really gotten an answer too. Why do you want to run the link higher overall as opposed to lower? Same gap on split but just raising the entire link.

Lowers the roll center of the car.
Raising the roll center would give the car a bit more rear traction. Lowering the roll center is usually used on high traction surfaces .

Chris Jarosz: It'll change the roll center of the car, even when the link is higher on both sides.

I've only ever really liked the lower link (C hubs) in very certain situations. And that is indoor on rear motor cars. For example at the same track for the rear motor B5 I run the hub link flipped, so lower. Outdoors it doesn't seem to work at all. To be honest the best way to explain it is it makes the car feel broken.

For the midmotor cars, they react different to changes than rear motor cars. I've tried the lowered link a number of times on both the C4 and B5M and it never seems to work for me. Not saying it doesn't work, but in general I haven't seen a situation where it works.

What I am trying to understand is when you make a change on one side of the camber link you are changing roll center I get roll center. However, I was never sure if you raise or lower the link equally on both sides that you are still changing roll center. That is what I am not sure about. When I make a roll center change , I will do so by changing my inner camber link height. Sometimes the outside by itself too. I have never changed both at the same time.

Raise link equally=lower roll center...lower link equally=higher roll center