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The Fiero computer controls more than just spark advance and air/fuel ratio. Hypertech searches for any computer controlled function that affects performance, and optimizes it. Timing, fuel curves and air fuel/ ratios are set to get the most emmissions legal HP you can from your computer system. For automatic transmission Fieros, torque converter lock-up speeds are set for best drivability. When performance can be gained without risk to the engine or valve train, Hypertech raises the rev limiters.
NOTE: The street runner chip requires no modifications.
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