Tuning is the origin of hot rodding. Back in the day, Pontiac owners with a taste for performance would dial in their cars' air/fuel ratios and timing among other things to squeeze a few more ponies ...
Obviously the engine was making more power, but how much more had yet to be determined. With our new 2.57-inch pulley, the WPI-massaged Eaton M90 pumped out 11.5-12.0 psi of boost through the ZZP ...
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