I've been looking around for quite some time and i was wondering if i was to do the Revised Full Z-Suspesion on an 04 Sedan non sport. How will my car perform in the rain with stock tires and rims. And i dink i will be getting new tires soon and what kind of tires would you guys recommend.

 

Suspension has little to do with rain performance [unless too stiff] as tires are 90% of equation with rubber compounds predominating [used tires wet friction declines with age as rubber hardens] tread depth is critical in directional tires and IF wet performance is to be optimum they should alway have more than 5/32" tread.

Hydroplane speed is a direct function of inflation pressure so high [35-40] PSI is always the order of the day. Remember rain lowers tire temp and thus PSI drops.

Ideally one sets COLD morning [before the tire has moved] PSI at 80% of Max inflation PSI].

 

http://www.tirerack.com/tires/tirete...e.jsp?techid=3

This shows actual wet tire patch at Sitting still, 35, 30, and 25 PSI over glass road.

The tire with the lowest PSI and lowest weight [downforce] will hydroplane first.............one of the reasons that rear tires tend to go first even without any acceleration.

Many don't realize that inflation pressure [PSI] means the pounds per square inch of tread intermolecular force with the road.

A tire with 1000 pounds of vertical load and 35 psi has a tread area of 1000/35 or 28.57 square inches.

If a certain amount of water drops a 0.9G capable tire to 0.6G one has two choices SLOW DOWN or increase PSI [unfortunately there is a PSI limit and getting near 90% {say 45 psi on a 51 or 40 on a 44] starts to change other parameters negatively.

Why 35 PSI COLD is usually considered a minimum for performance tires.

http://gaia.csus.edu/~grandajj/me143...rmula%20car%22