RAM 2500 & 3500 6.4L HEMI Tuning
RAM 2500/3500 6.4L HEMI Custom Tuning — HP Tuners & DiabloSport
N2 Speed writes custom calibrations for the 6.4L 392 HEMI V8 in the RAM truck line. Every file is built remotely around your VIN, your modification list and the fuel you actually run, then refined from your data logs. We do not sell canned maps.
RAM 2500/3500 6.4L HEMI Coverage
- 2014-2018 RAM 2500/3500 6.4L HEMI — 410 hp, 66RFE 6-speed
- 2019-2024 RAM 2500/3500 6.4L HEMI — 410 hp, ZF 8HP75 8-speed
- RAM 2500 Power Wagon — same 6.4L calibration platform
What Our 6.4L 392 HEMI V8 Calibration Addresses
We focus on torque management under load, tow-mode and grade-shift logic, the factory 87-octane spark tables, throttle response and 66RFE or 8HP75 shift firmness. Supporting modifications we routinely tune around include cold air intake, long-tube headers, cat-back exhaust, ported throttle body, camshaft packages and supercharger kits.
RAM 2500/3500 6.4L HEMI Tuning Stages and Pricing
| Stage | Built for | Typical gains | Price |
|---|---|---|---|
| Stage 1 — Stock & Minor Bolt Ons | Stock trucks and minor bolt-on builds — exhaust, headers, intakes and throttle body | 25-35 crank hp | $450 |
| Stage 2 — Heads, Cam & Stroker | Naturally aspirated heads, camshaft and stroker builds | 60-90 crank hp | $550 |
| Stage 3 — Complete Builds | Complete builds — supercharged and turbocharged trucks, plus a dedicated nitrous map where nitrous is used | 150+ crank hp depending on boost level and fuel | $650 |
Stage 3 builds that run nitrous receive a dedicated nitrous map — separate timing and fuel tables for the wet or dry kit, so the truck is safe on and off the bottle.
Not sure which stage fits your build? Email your mod list to sales@n2speed.com or call (954) 406-8550 — we would rather point you to the right package than sell you the wrong one.
What Every Tune Includes
- A custom calibration written for your 6.4L 392 HEMI V8, modifications and fuel
- Optimized fuel, spark and torque management tables
- Transmission shift point, firmness and torque-limit adjustments
- Revisions after data log review until the truck runs correctly
- Optional speed limiter removal, rev hang removal and drive mode changes
- A dedicated nitrous map on Stage 3 builds running a wet or dry kit
- Direct email access to the tuner who wrote your file — not a ticket queue
Revision Turnaround
- Revisions are completed in the order they are received during business hours.
- Set time frames are available with advance notice.
- After hours and weekend revisions are done when available.
Questions? Call (954) 406-8550 or email sales@n2speed.com. N2 Speed — Pompano Beach, Florida.
