Van@RevanRacing
Active Member
We installed a Kenne Bell 2.8 LC on my 2013 GT500. Like many of you I didn't want to replace my factory hood and the Kenne Bell 3.6 LC requires an aftermarket hood. Working closely with Jim Bell at Kenne Bell we discussed the merits of a 2.8 on the 2013 GT500 and power and torque with different pulley combinations. The attached dyno graphs have specific bar points that provide Horsepower, Torque and Boost at different RPM. The objective quite simply was to see how much power and torque is needed at peak levels and at varying engine RPM with a Kenne Bell 2.8 on 93 pump gas.
RunFile 17 BLUE is with a 3.00" upper pulley
RunFile 20 RED is with a 3.25" upper pulley
All dyno pulls were done with a Kenne Bell 5" intake and Dual 75MM Throttle Body. Next testing session will be with the Kenne Bell 128MM Oval Throttle Body.
*Note: I open track my 2013 GT500 and never tach the car over 6,000 engine RPM on track. My recent visit to Daytona International Speedway was with the 3.25 Upper pulley only.
Graph #1
Boost @ 6,000 RPM: 3.00" Upper Pulley 15.67 lbs
Boost @ 6,000 RPM: 3.25" Upper Pulley 13.12 lbs
Torque @ 6,000 RPM: 3.00" Upper Pulley 629.71 ft lbs
Torque @ 6,000 RPM: 3.25" Upper Pulley 578.51 ft lbs
RWHP @ 6,000 RPM: 3.00" Upper Pulley 719.57
RWHP @ 6,000 RPM: 3.25" Upper Pulley 659.16
Graph#2
Boost @ 6,500 RPM: 3.00" Upper Pulley 17.48 lbs
Boost @ 6,500 RPM: 3.25" Upper Pulley 14.48 lbs
Torque @ 6,500 RPM: 3.00" Upper Pulley 608.43 ft lbs
Torque @ 6,500 RPM: 3.25" Upper Pulley 551.29 ft lbs
RWHP @ 6,500 RPM: 3.00" Upper Pulley 753.12
RWHP @ 6,500 RPM: 3.25" Upper Pulley 682.76
Graph#3
Boost @ 7,000 RPM: 3.00" Upper Pulley no reference
Boost @ 7,000 RPM: 3.25" Upper Pulley no reference
Torque @ 7,000 RPM: 3.00" Upper Pulley 555.08 ft lbs
Torque @ 7,000 RPM: 3.25" Upper Pulley 530.61 ft lbs
RWHP @ 7,000 RPM: 3.00" Upper Pulley 739.75
RWHP @ 7,000 RPM: 3.25" Upper Pulley 707.19
Graph #4 Peak Boost and Horsepower Reference
Boost @ 6,800 RPM: 3.00" Upper Pulley 18.5 lbs
Boost @ 6,800 RPM: 3.25" Upper Pulley 15.3 lbs
RWHP @ 6,800 RPM: 3.00" Upper Pulley 753
RWHP @ 6,800 RPM: 3.25" Upper Pulley 707
Graph #5 Boost to Peak Torque Reference
Boost @ 4,550 RPM: 3.00" Upper Pulley 13.84 lbs - Torque 691
Boost @ 4,550 RPM: 3.25" Upper Pulley 10.79 lbs - Torque 629
What's impressive in the findings for me is the horsepower, torque and lower boost to accomplish the power figures. This was all done with a stock lower damper.
Van
RunFile 17 BLUE is with a 3.00" upper pulley
RunFile 20 RED is with a 3.25" upper pulley
All dyno pulls were done with a Kenne Bell 5" intake and Dual 75MM Throttle Body. Next testing session will be with the Kenne Bell 128MM Oval Throttle Body.
*Note: I open track my 2013 GT500 and never tach the car over 6,000 engine RPM on track. My recent visit to Daytona International Speedway was with the 3.25 Upper pulley only.
Graph #1
Boost @ 6,000 RPM: 3.00" Upper Pulley 15.67 lbs
Boost @ 6,000 RPM: 3.25" Upper Pulley 13.12 lbs
Torque @ 6,000 RPM: 3.00" Upper Pulley 629.71 ft lbs
Torque @ 6,000 RPM: 3.25" Upper Pulley 578.51 ft lbs
RWHP @ 6,000 RPM: 3.00" Upper Pulley 719.57
RWHP @ 6,000 RPM: 3.25" Upper Pulley 659.16
Graph#2
Boost @ 6,500 RPM: 3.00" Upper Pulley 17.48 lbs
Boost @ 6,500 RPM: 3.25" Upper Pulley 14.48 lbs
Torque @ 6,500 RPM: 3.00" Upper Pulley 608.43 ft lbs
Torque @ 6,500 RPM: 3.25" Upper Pulley 551.29 ft lbs
RWHP @ 6,500 RPM: 3.00" Upper Pulley 753.12
RWHP @ 6,500 RPM: 3.25" Upper Pulley 682.76
Graph#3
Boost @ 7,000 RPM: 3.00" Upper Pulley no reference
Boost @ 7,000 RPM: 3.25" Upper Pulley no reference
Torque @ 7,000 RPM: 3.00" Upper Pulley 555.08 ft lbs
Torque @ 7,000 RPM: 3.25" Upper Pulley 530.61 ft lbs
RWHP @ 7,000 RPM: 3.00" Upper Pulley 739.75
RWHP @ 7,000 RPM: 3.25" Upper Pulley 707.19
Graph #4 Peak Boost and Horsepower Reference
Boost @ 6,800 RPM: 3.00" Upper Pulley 18.5 lbs
Boost @ 6,800 RPM: 3.25" Upper Pulley 15.3 lbs
RWHP @ 6,800 RPM: 3.00" Upper Pulley 753
RWHP @ 6,800 RPM: 3.25" Upper Pulley 707
Graph #5 Boost to Peak Torque Reference
Boost @ 4,550 RPM: 3.00" Upper Pulley 13.84 lbs - Torque 691
Boost @ 4,550 RPM: 3.25" Upper Pulley 10.79 lbs - Torque 629
What's impressive in the findings for me is the horsepower, torque and lower boost to accomplish the power figures. This was all done with a stock lower damper.
Van