That makes sense phunk, while I understand compression ratios I didn't realize the factory turbos used different ratios than the same model car without turbo. I just equated psi boost to power because that seemed to be the biggest factor in the aftermarket units. With the '06 and later Miatas they did have trouble with pre-ignition because the compression ratio on the car was something like 11 to 1. They did finally overcome the problem some how but it took a while. Is pre-iginition a big problem with our Zs and FI systems?
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2010 Roadster, 7AT, Black Cherry, Touring, Navigation, Lighted Kick Plates, Floor and Trunk Mats.
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