XRAY - Model racing cars

I have been racing 1/10 Electric TC (XXX-S) I wanted experiment with 1/18th I have and M18 with an aftermarket chassis, I have a brand new Trinity monster moter, I bought a spring set, adjustable turn buckles, and shocks, also some 6 degree front ends. I got a new 6 cell battery on the way and set of foam tires on the way.

The parking lot surface is a bit rough but they do blow it off and lay down sugar water. They lay out the road course for 1/ 10, 100 ft staightaways 10 ft lanes.

I watched m18s race and it seems like they have trouble with the parking lot surface,(they get bounced around a bit) I am not sure but it seemed that there cornering ability suffered.

The big race is in 3 weeks. They are going to throw all the 1/18ths into one large class, so I will be runing against Mini Ts Rc18s Vendettas etc; I assume some mamba powered cars.

On the rctech.net mini forum, people were claiming that on a flat road course RC18s were easily beating M18s. I had thought that any "off-road" vehicle would be too high centered be fast in the corners. I seems the larger tires and track width actually compensates for that.

Any ideas for the best set up?