Dodge Challenger & Charger Tuning Guide
The Dodge Challenger and Charger represent modern American muscle at its finest. From the 5.7L HEMI to the supercharged Hellcat, these platforms respond exceptionally well to ECU calibration. HP Tuners provides comprehensive support for all modern HEMI applications.
HEMI Engine Lineup
5.7L HEMI (Eagle)
- Power: 370-395 HP / 395-410 lb-ft
- Technology: MDS (cylinder deactivation), VVT
- Applications: R/T, R/T Plus, R/T Scat Pack 1320
- Transmission: 8-speed auto or 6-speed manual
6.4L 392 HEMI (Apache)
- Power: 485 HP / 475 lb-ft
- Technology: MDS (deactivatable), VVT
- Applications: Scat Pack, R/T Scat Pack, SRT 392
- Transmission: 8-speed auto or 6-speed manual
6.2L Supercharged Hellcat
- Power: 717-807 HP / 656-717 lb-ft
- Supercharger: 2.4L IHI twin-screw
- Applications: Hellcat, Redeye, Super Stock, Demon
- Boost: 11.6 psi (Hellcat) to 14.5 psi (Redeye/Demon)
HP Tuners: The Platform of Choice
HP Tuners offers the most comprehensive tuning solution for modern HEMI vehicles:
Calibration Access
- Full PCM read/write capability
- Fuel and spark table access
- MDS disable/enable control
- VVT cam timing optimization
- Speed limiter adjustment
- Torque management calibration
- Rev limiter modification
Transmission Tuning
- ZF 8HP transmission calibration
- Shift point optimization
- Shift firmness adjustment
- Torque converter lockup strategy
- Launch control enhancement
5.7L HEMI Tuning
Stock Tune Optimization
A properly calibrated 5.7 HEMI gains:
- 15-25 HP through timing and fueling optimization
- Improved throttle response
- MDS refinement or disable
- Better transmission behavior
- Rev limiter increase available
Modified 5.7L
- CAI + tune: 20-30 HP
- Headers + tune: 35-50 HP
- Cam swap: 50-80 HP, requires custom tune
- Full bolt-on: 420-450+ WHP achievable
6.4L 392 HEMI Tuning
Stock Tune Optimization
The 392 has significant tuning potential:
- 25-35 HP gain from tune alone
- Improved power delivery throughout RPM range
- Better transmission calibration
- Enhanced throttle response
Modified 392
- Headers + tune: 40-60 HP
- Cam + headers: 520-550+ WHP
- Forced induction: Supercharger kits available (ProCharger, Whipple)
- NA potential: 550+ WHP with aggressive build
Hellcat Tuning
Supercharged Tuning Considerations
The Hellcat platform offers massive tuning potential:
- Stock supercharger capable of more boost
- Factory calibration leaves headroom
- Fuel system adequate for 850-900 HP
- Cooling critical for sustained power
Hellcat (717 HP Stock)
- Tune only: 750-780 HP
- Pulley + tune: 800-850 HP
- Full bolt-on: 900+ HP achievable
Redeye/Demon (797-840 HP Stock)
- Tune only: 850-880 HP
- Pulley + tune: 900-950 HP
- Full bolt-on: 1000+ HP achievable
- Built motor: 1200+ HP possible
Key Tuning Parameters
Fuel System
- Injector sizing and pulse width
- Fuel pressure targets
- Air/fuel ratio optimization
- E85/flex fuel calibration
Ignition Timing
- Spark advance tables
- Knock detection calibration
- MBT timing optimization
- Boost-referenced timing (Hellcat)
MDS (Multi-Displacement System)
- Cylinder deactivation thresholds
- Complete disable option
- Transition smoothing
- Oil consumption concerns addressed
ZF 8HP Transmission Tuning
The ZF 8-speed automatic is incredibly responsive to calibration:
- Faster shift times
- Firmer engagement
- Optimized shift points for power band
- Improved sport mode behavior
- Launch control enhancement
- Line pressure optimization
E85 and Flex Fuel
HEMI engines love ethanol:
- 5.7L: 30-40 HP gain on E85
- 6.4L: 40-50 HP gain on E85
- Hellcat: 80-100+ HP gain on E85
- Flex fuel sensor allows automatic blend detection
- E85 enables more aggressive timing and boost
Diablo/Pulsar Alternatives
While HP Tuners is our preferred platform, some alternatives exist:
- Diablo Trinity: Popular handheld tuner
- Diablosport Pulsar: Plug-in module
- Tazer: Feature unlock device (not true tuning)
Note: HP Tuners provides more comprehensive calibration access for serious performance work.