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Having a shorter sidewall in the rear stiffens up the rear, while having a taller sidewall in the front softens the front. This helps to reduce the Z's inherent understeer (Push). A lot of people say that adding a front Strut bar is not helpful because it actually stiffens up the chassis in the front, which doesn't help the understeer problem. However, I feel the chassis should be as stiff as possible and the suspension and tires should be modified to correct handling problems. Why? Chassis flex is not a good thing, and its not always predictable. Usig no strut bar is treating the symptoms and not the problem. If you want a softer front use a softer spring rate or softer shock setting and wider tires with a larger sidewall. It can be somewhat adddressed with the stock shocks on a TT by setting the shocks to Touring, disconnecting the front shock actuators and setting the Suspension back to Sport. This leaves the Front shocks in the soft Touring setting and puts the rear in the stiffer Sport setting. Would you believe that I learned all of this from racing R/C Cars? There are a TON of things that can affect handling, Sway bars, shocks, shock damper material and pressure, spring rate, spring type, L/R/F/R car balance, Differential types, Shock mounting locations and geometry, tire/wheel width, height, and weight, tire compound, toe, camber, caster... the list goes on and on. Using 17" Front and 18" rear is one way the SMZ addressed the understeer problem.
"If Speed Kills, You're Talkin' to a Dead Man."
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