Dodge Charger 6.4L 392 Tuning

Dodge Charger 6.4L 392 Custom Tuning — HP Tuners & Diablosport

N2 Speed writes custom calibrations for the 6.4L 392 HEMI V8 in the Dodge Charger — Scat Pack, R/T Scat Pack, SRT 392 and Daytona 392. 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.

Dodge Charger 6.4L 392 Coverage

2012-2014 Charger SRT8 (6.4L) — 470 hp, 5-speed NAG1
2015-2023 Charger SRT 392 / Scat Pack — 485 hp, 8-speed ZF 8HP70
Daytona 392 and Scat Pack Widebody — same calibration platform
2023 Last Call editions — supported, send your VIN to confirm

What Our 6.4L 392 HEMI V8 Calibration Addresses

We focus on spark advance the factory leaves on the table on 93 octane, torque management and traction limiting in low gears, throttle response, and 8HP70 shift firmness and shift points. Supporting modifications we routinely tune around include cold air intake, long-tube headers, high-flow catalytic converters, ported intake, camshaft packages, nitrous, and Whipple, Magnuson or ProCharger kits.

Dodge Charger 6.4L 392 Tuning Stages and Pricing

Stage	Built for	Typical gains	Price
Stage 1 — Stock & Minor Bolt Ons	Stock cars and minor bolt-on builds — exhaust, headers, intakes and throttle body	30-40 crank hp with intake, headers and exhaust	$450
Stage 2 — Heads, Cam & Stroker	Naturally aspirated heads, camshaft and stroker motor builds	70-100 crank hp on a cam and long-tube package	$550
Stage 3 — Complete Builds	Complete builds — supercharged and turbocharged cars, plus a dedicated nitrous map where nitrous is used	150-250 crank hp depending on boost, nitrous 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 car 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 car runs correctly
Optional speed limiter removal, MDS handling, 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 — if you need your car ready for a specific day, track rental or event, tell us ahead of time and we will schedule it.
After hours and weekend revisions are done when available. We often get to them, but they are not guaranteed outside business hours.

Send clean data logs with your revision request and it moves through the queue faster.

How Remote Tuning Works

Order your stage. Pick the package that matches your build.
Send your details. Email your VIN, mod list, fuel type and stock read to sales@n2speed.com.
Flash the file. We email your calibration, normally within 1-2 business days.
Log and refine. Send data logs and we revise until the car is dialed in.

Locked Dodge PCMs

2015 and newer Dodge PCMs ship locked against aftermarket writing. We unlock them with our 2015+ Dodge PCM unlock service, and for modules that must be written off the vehicle we offer Dodge PCM bench tuning — including MDS delete and speed limiter removal. Send your VIN and we will tell you which route your car needs.

Frequently Asked Questions

How much does a Charger 6.4L 392 tune cost?

Our Charger 6.4L 392 remote tunes are $450 for Stage 1 (stock cars and minor bolt-ons such as exhaust, headers, intakes and throttle body), $550 for Stage 2 (naturally aspirated heads, cam and stroker builds) and $650 for Stage 3 (complete builds with superchargers or turbos, including a nitrous map where nitrous is used). Every package includes revisions after we review your data logs.

How much horsepower will a tune add to a Charger 6.4L 392?

On 93 octane a Stage 1 calibration typically returns 30-40 crank hp with intake, headers and exhaust. Stage 2 builds see 70-100 crank hp on a cam and long-tube package and Stage 3 builds see 150-250 crank hp depending on boost, nitrous and fuel. Results vary with modifications, fuel quality, altitude and ambient temperature.

Do I need to unlock my PCM to tune a Charger 6.4L 392?

2015 and newer Dodge PCMs are locked from the factory. We handle that with our 2015+ Dodge PCM unlock service, and for modules that have to be written off the car we offer Dodge PCM bench tuning. 2011-2014 cars normally flash straight through the OBD-II port. Send your VIN and we will confirm before you spend anything.

Do you tune with HP Tuners or Diablosport?

Both. Choose Charger HP Tuners tuning if you want full table-level control and data logging, or Charger Diablosport tuning if you prefer a handheld device. Compare the hardware on our Charger tuning devices page, or email us and we will recommend one.

What equipment do I need for remote tuning?

For HP Tuners: an interface such as the HP Tuners MPVI4 with Pro Feature Set plus credits for your car, and a Windows laptop with VCM Suite. For Diablosport: an i3 or Trinity 2 device. A wideband air/fuel gauge is recommended for Stage 2 and required for Stage 3.

How long does the tuning process take?

Your first calibration is normally emailed within 1-2 business days of us receiving your stock read and vehicle details. Revisions are then completed in the order they are received during business hours. Set time frames are available with advance notice, and after hours and weekend revisions are done when available.

Can you tune a completely stock Charger 6.4L 392?

Yes. A stock 6.4L 392 HEMI V8 leaves power, throttle response and transmission behaviour on the table. Stage 1 exists for exactly this car.

Will a custom tune affect my factory warranty?

Modifying the factory calibration can affect powertrain warranty coverage. We recommend flashing back to the stock file before any dealer visit. Full terms appear on each product page.