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0505htp Truck 20 Z

After removing the factory imposed 94mph speed limit and setting the transfer case to 2wd, the baseline dyno run resulted in 244.1 rwhp and 276.3 lb-ft of torque. After the cat-back installation, back-to-back runs resulted in 251.8 rwhp and 283.1 lb-ft of torque, a gain of 7.7 hp and 6.8 lb-ft of torque. (Note that dyno spikes resulted in slightly different horsepower numbers and exaggerated torque readings.) Considering the computer had no time to relearn and the increase was noted across the rpm rage, this is a real gain. The headers were good for another 9.8 HP and 10.3 lb-ft of torque. Due to circumstances beyond our control, a different Dynojet had to be used for the header numbers, but that dyno was set up identically to the previous unit.
Stainless Works Headers & Catback Install - Velocity Viagra

After removing the factory imposed 94mph speed limit and setting the transfer case to 2wd, the baseline dyno run resulted in 244.1 rwhp and 276.3 lb-ft of torque. After the cat-back installation, back-to-back runs resulted in 251.8 rwhp and 283.1 lb-ft of torque, a gain of 7.7 hp and 6.8 lb-ft of torque. (Note that dyno spikes resulted in slightly different horsepower numbers and exaggerated torque readings.) Considering the computer had no time to relearn and the increase was noted across the rpm rage, this is a real gain. The headers were good for another 9.8 HP and 10.3 lb-ft of torque. Due to circumstances beyond our control, a different Dynojet had to be used for the header numbers, but that dyno was set up identically to the previous unit.  View Related Article

 

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