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I don't have experience with the EPS. I am interested. I do autocross with wide tire 275/35-15 on 15x10 wheels on all four corners. While moving, the effort to turn the steering wheel isn't terrible. I try not to turn the wheel while the car isn't moving because I feel that I might over stress the steering rack. The 280Z has a slower rack than the 240Z. For autocross, I would swap to am240Z rack. I measured the difference between the racks in a thread several years ago. Going from memory, the 280Z rack moves 1.59 inches per revolution of the steering wheel, and the 240Z rack moves 1.81 inches per revolution of the steering wheel. The faster rack would benefit more from the power steering, but is usable without as long as the vehicle is moving.

06-13-2026 ATLAS Z UPDATE. Today I finished screwing down the carbon fiber and installed the front flares. Pretty much all done. Later I will tape off both sides of each edge and lay in a coat of black pure silicone....then pull the tape off leaving straight lines and let it harden up. Then some paint correction and some clear and the body will be done! I gathered up some parts I am taking to get wrapped in dry carbon fiber (front bumper, cowl, and rear spoiler). PICS:

The factory 2006 GM ECU, called a "P12". Jeremy Gonyou at Lime-Swap converted my engine harness into a stand alone setup and cracked my ECU and programmed it for the turbo. By using a factory setup I retain the variable valve timing and the wireless throttle. 60lb/hr Deka fuel injectors and with an 8 psi spring in my external wastegate.....around 350-400 hp at the crank. Very mild setup.........well over 300 at the wheel, which in these cars is sufficient.