Richard brought us his 2012 Dodge Challenger SRT8 to have the 6.4L Hemi and NAG1 transmission built, Whipple supercharged, and bring the power up to Hellcat levels! Modifications performed below:

 

• Better Built Performance 6.4L built short block
• ARP main studs
• Better Built Performance Big Gas cylinder heads with upgraded PSI 1511 valve springs
• Better Built Performance custom-built NAG1 transmission
• ProTorque torque converter
• Manley Performance Products, Inc. Chromoly pushrods
• Cam Motion custom billet core VVT camshaft
• COMP Cams phase-limiter kit
• OEM Mopar Hellcat engine oil pump
• OEM Mopar Hellcat lifters
• OEM Mopar non-MDS block valley plug
• COMP Cams steel retainer kit
• Whipple Superchargers Stage-II 2.9L W175AX twin-screw system
• Whipple Superchargers upgraded air-intake system
• Whipple Superchargers 3.375" upper pulley
• NGK Spark Plugs LZTR7AIX-13 spark plugs
• Stainless Works long-tube headers
• MotoRad 180° thermostat
• MSD Performance fuel pump voltage booster
• HP Tuners unlocked ECU
• All the miscellaneous OEM and aftermarket components to bring it all together.

 

With the mechanical work wrapped up, John strapped her down to the rollers for Vlad to perform a custom calibration via HP Tuners. With the Whipple 2.9L delivering ~12psi, Vlad increased the 392's output to a repeatable 672.71whp & 588.43lbft! With the boost set to such a conservative level, there is plenty more jam in the jar when Richard is ready!