9/27/2023 0 Comments Fuel pc tweaksThe tuner believes this is as far as possible to go safely while running on pump gas, at least without installing aftermarket components. Compared to the first run, the powerplant now has 6.8 percent more horsepower and 7.3 percent more torque than the stock setup. ![]() ![]() However, adjusting the timing causes the mill to run lean, so the air-fuel ratio needs further changes.Īfter making the final adjustments, the dyno shows the engine making 438 hp (327 kW) and 483 lb-ft (655 Nm) at the wheels (see the graph above). At this point, the dyno shows the engine making 435 hp (324 kW) and 475 lb-ft (644 Nm). Then, he starts advancing the ignition timing. Another test on the dyno now shows the Viper making 412 hp (307 kW) and 457 lb-ft (620 Nm).įrom there, the tuner continues to tweak the air-fuel ratio until things are ideal. ![]() The initial run shows the Viper running rich in the middle of the rev range, so the tuner reduces the air-fuel ratio.
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