Jeep Grand Cherokee SRT 6.4L Remote Tuning
Jeep Grand Cherokee SRT 6.4L Remote Custom Tuning with HP Tuners
N2 Speed builds custom HP Tuners calibrations for the Jeep Grand Cherokee SRT 6.4L and its 6.4L 392 HEMI V8 — remotely, so your Jeep never has to sit on someone else's dyno for a week. Every file is written for your specific combination of modifications, fuel and driving use. We do not resell generic canned maps.
Tuning is handled by email and data log review: you send us your stock file and vehicle details, we build the calibration, you flash it with your HP Tuners interface, then we refine it from your logs until the 6.4L is exactly where it should be.
Jeep Grand Cherokee SRT 6.4L Coverage
- 2012-2013 Grand Cherokee SRT8 — 470 hp, W5A580 5-speed automatic
- 2014-2021 Grand Cherokee SRT — 475 hp, ZF8HP 8-speed automatic
- 2018-2021 SRT with Launch Control — drive-mode and launch calibration adjusted
- 2015+ models — locked PCM, unlock service required first
2015 and newer SRTs have a locked PCM and need our mail-in unlock service first — send your VIN and we will confirm which route your Jeep needs.
What Our 6.4L 392 HEMI V8 Calibration Addresses
We focus on 392 spark and fuel calibration, MDS strategy, torque limits, launch control, drive-mode mapping and ZF8HP shift firmness. Common supporting modifications we tune around include cold air intake, long-tube headers, ported throttle body, camshaft package, Whipple or Magnuson supercharger, nitrous, E85 conversion.
Jeep Grand Cherokee SRT 6.4L Tuning Stages and Pricing
| Stage | Built for | Typical gains | Price |
|---|---|---|---|
| Stage 1 — Stock & Bolt-Ons | Stock vehicles and builds with minor bolt-ons — exhaust, headers, cold air intake or a throttle body | 25-35 hp and 30-40 lb-ft on 93 octane | $450 |
| Stage 2 — Heads, Cam & Stroker | Naturally aspirated builds running heads, a camshaft package or a stroker motor | 70-120 hp with a cam package or stroker build | $550 |
| Stage 3 — Supercharged, Turbo & Nitrous | Complete builds with a supercharger or turbo kit, including a dedicated nitrous map | 150-300+ hp on a supercharger or turbo kit with supporting fuel | $650 |
Not sure which stage fits your build? Email a mod list to sales@n2speed.com or call (954) 406-8550 and we will tell you which package to buy — we would rather point you to the right one than sell you the wrong one.
HP Tuners Credits for the Jeep Grand Cherokee SRT 6.4L
Total Credits Needed
Credits are how HP Tuners licenses each vehicle. They load onto your MPVI4 and are spent once, the first time the module is read. Adding transmission tuning means a second module is licensed, so the credit total goes up — the options above already include both.
- Engine Only — 2012-2021: 2 Universal Credits
- Engine and Transmission — 2014-2021 ZF8HP 8-speed: 6 Universal Credits
Credit requirements are set by HP Tuners and can change with model year. If your Jeep is not listed exactly, send your VIN to sales@n2speed.com and we will confirm before you buy anything.
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 strategy adjustments where applicable
- Revisions after data log review until the vehicle runs correctly
- Optional MDS cylinder deactivation removal, speed limiter removal and drive mode adjustments
- Direct access to the tuner who wrote your file — not a ticket queue
What You Need Before You Order
- An HP Tuners interface such as the HP Tuners MPVI4 with Pro Feature Set, plus credits for your vehicle
- A Windows laptop with HP Tuners VCM Suite installed
- Your stock read (we will walk you through pulling it)
- A wideband air/fuel gauge — recommended for Stage 2, required for Stage 3
How Remote Tuning Works
- Order your stage. Pick the package that matches your build.
- Send your information. 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; we revise until the 6.4L is dialed in.
Revision turnaround: Revisions are done in the order they are received during business hours. Set time frames are available with notice. After-hours and weekend revisions are done when available.
Locked Jeep PCMs
Stellantis locks the PCM on 2015 and newer Jeep, Dodge, Chrysler and RAM vehicles against aftermarket writing. If your Jeep cannot be flashed through the OBD-II port, we handle it with our mail-in Dodge, RAM & Jeep PCM unlock service, and we also offer Jeep PCM bench tuning service for modules that need to be written on the bench. Send your VIN and we will confirm which route yours needs before you spend anything.
Frequently Asked Questions
How much does a Jeep Grand Cherokee SRT 6.4L tune cost?
Our Jeep Grand Cherokee SRT 6.4L HP Tuners remote tunes are $450 for Stage 1 (stock and bolt-on builds), $550 for Stage 2, and $650 for Stage 3 supercharged, turbocharged or nitrous builds. Pricing includes revisions after we review your data logs.
How much horsepower will a tune add to my Jeep Grand Cherokee SRT 6.4L?
On 93 octane a Stage 1 calibration typically returns 25-35 hp and 30-40 lb-ft on 93 octane. Stage 2 builds see 70-120 hp with a cam package or stroker build, and Stage 3 builds see 150-300+ hp on a supercharger or turbo kit with supporting fuel. Actual results depend on your modifications, fuel quality, altitude and ambient temperature.
Do I need to unlock my PCM before tuning?
2015 and newer Jeep, Dodge, Chrysler and RAM vehicles need our mail-in Dodge, RAM & Jeep PCM unlock service before HP Tuners can write to the PCM. Earlier models flash straight through the OBD-II port. Send us your VIN and we will tell you which path yours needs.
How many HP Tuners credits do I need?
- Engine Only — 2012-2021: 2 Universal Credits
- Engine and Transmission — 2014-2021 ZF8HP 8-speed: 6 Universal Credits
What equipment do I need for remote tuning?
An HP Tuners interface — we recommend the HP Tuners MPVI4 with Pro Feature Set — the credits for your vehicle, a Windows laptop with VCM Suite installed, and an internet connection. A wideband air/fuel gauge is recommended for Stage 2 and required for Stage 3. You can add the interface and credits to your order.
How long does the tuning process take?
Your first calibration is normally emailed within 1-2 business days of us receiving your vehicle information and stock file. Revisions are done in the order they are received during business hours. Set time frames are available with notice. After-hours and weekend revisions are done when available.
Can you tune a completely stock Jeep Grand Cherokee SRT 6.4L?
Yes. A stock 6.4L 392 HEMI V8 still leaves power, throttle response and transmission behaviour on the table. Stage 1 is designed exactly for stock and lightly modified vehicles.
Will a custom tune affect my factory warranty?
Modifying the factory calibration can affect powertrain warranty coverage. We recommend returning to the stock file before any dealer visit. Full terms appear on each product page.
Related Jeep Tuning
Jeep Grand Cherokee 5.7L HEMI · Jeep Grand Cherokee Trackhawk · Jeep Wrangler 3.6L Pentastar · Jeep Wrangler Rubicon 392 · Jeep Gladiator 3.6L
All Jeep remote tuning · Dodge, RAM & Jeep remote tuning · Jeep PCM bench tuning
Questions about your build? Call (954) 406-8550 or email sales@n2speed.com. N2 Speed — Pompano Beach, Florida.
