Performance Programmer
The bolt-on
A DiabloSport Predator flash programmer. $400
The mule
The Camaro with a Granatelli Mass Airflow Sensor and a BBK LS1 Performance Throttle Body.
Our take
The Predator allows custom tuning, which allowed us to dial in the Camaro's computer to work with other bolt-ons.
Before
Max torque: 317 @ 4,450 rpmMax power: 304 @ 5,300 rpmAverage torque: 290 lb-ftAverage power: 218 hp
After
Max torque: 325 lb-ft @ 4,600 rpmMax power: 316 hp @ 5,400 rpmAverage torque: 303 lb-ftAverage power: 226 hp
Difference
+8 lb-ft+12 hp
Performance Chip
The bolt-on
A Jet Performance Products GM Stage 2 chip. $130
The mule
A bone-stock '91 Silverado TBI 350 transplanted into an '84 El Camino. Power measured at the rear wheels.
Our take
The car's owner reports vastly improved performance throughout the rpm range; economy improved by 2 mpg.
Before
Max torque: 230 lb-ft @ 3,700 rpmMax power: 167 hp @ 4,100 rpmAverage torque: 191 lb-ftAverage power: 152 hp
After
Max torque: 245 lb-ft @ 3,300 rpmMax power: 169 hp @ 4,200 rpmAverage torque: 193 lb-ftAverage power: 152 hp
Difference
+15 lb-ft+2 hp