[LAP1DOUG]

OP, I am running pretty close to the same set-up as Stone, which looks like good advice to me. I will add a few points that I have found:

1- Ride height, camber, and toe are all highly inter-related with this supension geometry. If you are running coilovers, then you must fix ride height & corner weights first before even thinking about camber, caster, and toe.

2- If you go too low on the rear, you will have too much negative camber, and run out of toe adjustment. This is one of the reasons that some people use rear adjustable toe links on these cars. I feel it is better not to go that low, but the after market toe links are still good to eliminate rubber bushing deflection, and be able to shim the upright attachment to adjust bump steer.

3- Optimum front to rear tire stagger is a function of what you do to optimize camber. If you don't modify camber to get near -3 deg as Stone suggested, then the optimum tire stagger will be close to "square". (something like 255 F / 265 R). However, if you crank in enough negative camber to optimize the front tire, then you will need more stagger - something like 255 F / 285 R, with the appropriately correct wheel sizes of course.

4- A GT3 front bar is the best mod you can make if you do nothing else. If you get it set at just the right roll stiffness, it will help reduce understeer by reducing the amount of positive camber in roll that all McStrut designs (911 or 986) experience. However, if you you think a little is good, then a lot is better, it will understeer like a pig.

5- If you use coilovers, go with fairly high spring rates to better control dynamic camber and toe changes. If you use a significantly higher spring rate in the rear, you may not need much or any rear bar. It is a fine balance with these cars, and sometimes a relatively small change in roll stiffness at one end can result in major oversteer or understeer. I suggest testing all new set-up changes on an auto-x course before heading to a track.

Hope to see you at a Southeast track sometime this year.