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 The dyno fun started with...  The dyno fun started with a baseline before installing ProCharger's P-1SC. The '11 Mustang spun the rollers to 369 rwhp and 352 lb-ft of torque.  Once the supercharger was...  Once the supercharger was installed and the tune was loaded, power jumped to 524 rwhp and 430 lb-ft of torque with only 7 pounds of boost. You can't complain about adding 155 rwhp and 78 lb-ft of torque in less than a day-but this wasn't good enough.  After giving the 5.0-liter...  After giving the 5.0-liter a little cool down time, Schmidt pulled the 4.38-inch pulley and installed the smaller 4.25-inch replacement. The smaller pulley produced about another half pound of boost, bringing the total pressure to 7.5 psi. With the car back at operating temperature, the '11 spun the rollers to 543 rwhp with 429 lb-ft of torque. An extra 19 rwhp from a half-pound of boost is a great gain!  Once the stock midpipe was...  Once the stock midpipe was swapped for the off-road variant, we prepared for some more dyno runs. After bringing the car to operating temperature once again, the GT spun the rollers to 560 rwhp and 438 lb-ft of torque, for a gain of 17 rwhp and 9 lb-ft of torque.  Next, The P-1SC was swapped...  Next, The P-1SC was swapped for the larger D-1SC supercharger. With the tune altered for more boost and multiple people monitoring the air/fuel ratio and AIT, Jones started the first pull. After cutting the first pull short, it was apparent we were rapidly approaching the limits of the stock fuel pump. Jones quickly pulled a Boost-a-Pump off the shelf and installed it. With the voltage to the fuel pump increased, Jones began rolling through the gears again. The second was cut short yet again, and the tune was adjusted to alter the fuel curves. After reflashing the ECM, Jones spun the rollers for the first full dyno pull. Everyone stood in suspense as the computer screen lit up with the horsepower numbers. With 607 rwhp and 491 lb-ft of torque sitting on the screen, we knew we got the job done.
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