I've seen the different suggestions for camber for different sized wheels, and for 18" wheels it's generally suggested to be around -1 degree in the front and -.5 degrees in the back for a street/track setup.

However, Hoosier recommends a minimum of -3 degrees of camber when running their R6s

What are most people running (with R-compound use) for a good combination of durability and performance?

I run 17" street tires to drive to the track and 18" R6s once I get there, and I don't really drive the car otherwise

Should I just split the difference and run -2.2/-1.8? Why don't people that track RX7s seem to run as much negative camber as other drivers? Solely the increased negative camber on compression?
Thanks

 

FD or FB/FC?

I have no idea where you read -1/-.5* was a good street/track setup that's really low.

on my FC I run -3.5/-2 with Hoosier A6s. and FD you'll want to run lower because it has better camber gain on compression.

 

These are the pettit specs for street tires

 

you need to do tire temps to find the optimal spot for the hoosiers, the R6 is a race tire, they only last a weekend or two, so just to throw em on and not get optimal traction is a waste....

so you need to take tire temps. as the camber you actually need will vary with the tire size, spring rate, etc etc. we run a honda, but we're running -3 to -3.5 in the front and -5 in the rear, basically its just an FC setup backwards...

 

Agreed, it will all depend on the car and suspension setup. My fb is very low (ride height) and I run very stiff swaybars along with relatively soft springs. As a result, my car corners extremely flat. This means that there is very little (if any) camber change while cornering. At a guess, I would say I have to run about 1.5 negative to get full contact on corners.

I tried running 3 degrees negative camber for one event, and found that I was quickly wearing out the inside edges of the tires. 1.5 seems to result in very even wear.

Checking the temps on the tires (outside edge, center, inside edge) is really the only way to determine the requirements of your car.


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