Other mods include a lightweight flywheel, a rear shifter bushing, transmission bushing insert, shifter springs and soon to be added, rear differential bushing inserts. I have made some other modifications as well, but these two were a necessity. I had to make 2 major changes to restore the "balance". It is easy to drive around town and is amazing going up mountain roads. Every characteristic of the BRZ that I liked originally is now only better. The extra power makes the car feel even lighter and more nimble. In fact, it feels all around a better car.
It doesn't feel unpredictable, nose heavy or any less of what it originally was. I feel that this car can easily handle more power. So I swapped out the clutch for a Southbend stage 2 daily clutch. In 5 or 6th gear at mid rpms, I could get the clutch disc to slip just by hitting the gas pedal. The suspension handles the increased power quite well. It's predictable on wet roads and still handles like a dream. I can still break the rear loose, but only when I want to. I feel that this alone brought most of the balance back to the car. I knew I would need more traction so I went with some Michelin Pilot Sport 4s tires. Turning at an intersection and being in second gear, I could break the rear end loose, sometimes on accident. One of the first things I noticed was that the Prius tires would break traction rather easily. This takes the car to somewhere around 300bhp. I went with a Cosworth supercharger using the smaller drive pulley and Cosworth 3" exhaust. I wish some of the people that have the car boosted would chime in with detailed first hand descriptions of how the balance differs,or maybe I missed those posts.
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