Dennis brought us his Whipple supercharged 2013 Jeep Grand Cherokee SRT8 to add a ground-pounding idle and get the 6.4L Hemi making safe power with less boost! Build details below:
Performed by us:
• COMP Cams Stage-2 camshaft
• COMP Cams phase limiter
• COMP Cams valve seats, valve seals, valve springs, valve retainers & locks
• Manley Performance Products, Inc. chromoly pushrods
• MDS delete utilizing OEM Mopar components
• OEM Hellcat lifters
• OEM Hellcat engine oil pump
• NGK Spark Plugs LZTR6AIX-13 spark plugs
• MotoRad 180° thermostat
• All the miscellaneous OEM and aftermarket odds-and-ends to bring it all together.
Pre-existing modifications:
• Whipple Superchargers 2.9L W175FF twin-screw supercharger system
• Whipple Superchargers 3.25″ upper supercharger pulley
• MSD Performance fuel pump voltage booster
• Kooks Headers and Exhaust long-tube headers with high-flow catalytic converters
With the mechanical work wrapped up in the shop by Dom, John strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. With 93 octane in the tank, Vlad increased the 6.4L Hemi’s output to 639.52whp & 533.48lbft! Perfectly safe power for the stock bottom end, with less boost pressure, and that ground-pounding idle Dennis was after!
