JH Motorsports is proud to release our JHM C7 S6-S7 and D4-A8 4.0T  ECU and TCU Software!

 *NOTE: Purchase of our software includes Stage 1, Stage 2 and Stage 3 RS/RS+*

Experience the ultimate in performance with our cutting-edge software for the 4.0T engine. Our team of engineers has spent years refining and perfecting our software, ensuring that you get optimal performance without any guesswork.

With our one-cable flashing suite for both ECU and TCU, you'll get the most out of your vehicle's potential. Our transmission tune is optimized with a 2000 to 2500 rpm launch control, ensuring that you get consistent launches without tire spin on street tires and stock turbos. We've performed hundreds of test passes to ensure that our launch assist range is ideal for street tires while still keeping your rear axles intact.

This is a one-and-done solution that only requires a single flashing cable (JHM Power-Connect) and can be easily flashed in the comfort of your own home with an internet connection. And the best part? Upgrading to Stage 2 and 3 is absolutely free!

Our ECU and TCU combination is specifically designed to work together, providing you with a range of benefits that include increased engine rev limits, more aggressive throttle control, faster shifting speeds, and higher clutch clamping loads. Our software also offers a more assertive shifting experience in Sport mode and after launching, as well as a variable launch RPM for more aggressive and consistent launches.

We've also fine-tuned our software for refined drive and normal driving shifting dynamics, decreased transmission wear, raised torque limiters, and a more aggressive torque curve. Our software offers maximum boost for each gear with faster spool, safe EGT management for stock catalyst protection, and a larger range of fuel and ignition adaptation for even more power.

We've even adjusted our ESP and traction control to eliminate micro braking due to tire spin, helping to prevent axle breakage when launching. Experience the best in performance with our state-of-the-art software for the C7 S6, S7, and D4 A8 4.0T.

By making an ECU and TCU combination that works together we were able to do the following for your C7 S6 S7 and D4 A8 4.0T 

• Engine Rev limit increased to 7200 rpm
• More aggressive throttle control
• Increased shifting speeds
• Faster Clutch Clamping with Higher Clamp Loads
• More assertive shifting in Sport mode and after launching
• Variable Launch RPM 
• More aggressive and consistent Launch
• Refined Drive and normal driving shifting dynamics
• Decreased Transmission wear due to less slipping from faster shifting
• Raised TQ limiters
• More Agressive Torque Curve
• Maximum Boost for each gear with faster spool
• Safe EGT Management for Stock Catalyst Protection keeping your car as safe as possible while maximizing performance - Stage 1
• Larger Range of Fuel Adaptation for More Power from Better Fuel
• Larger Range of Ignition Adaption 
• ESP / traction control adjusted to eliminate micro braking due to tire spin (Helps prevent axle breakage when launching)

AVAILABLE FILES INCLUDED: 

• Stage 1 -  Stock Vehicle

• Stage 2  - JHM Downpipes with JHM 3" Catback recommended for optimal performance

(Stage 3 RS and RS+ Also included with our software)

Available Fuel Options:

• 91 Octane

• 93 Octane

• 100+ Octane

• E40

• E85 (you must contact us to confirm you have the supporting fuel system mods)

Performance

MODS:  BONE STOCK with JHM ECU/TCU Software,  Stage 1 93 Octane

MODS:  JHM Heat Exchanger, JHM 3" Downpipe, and  JHM ECU/TCU - Stage 2  E40

DISCLAIMER: JHM is now using proven flashing technology in order to get our tunes on our customers' cars in the quickest and most convenient way possible. You will be installing a proprietary JHM software that works ONLY with our flash cable (supplemental software such as Microsoft .net may be required). This program is what allows you to detect your ECU part number, fill in your information, select the correct program based on your hardware and then write JHM Tune to your ECU all through your OBD II port. Both of these programs are highly specific when it comes to configuring your computer to run them properly. While every effort has been made to clearly and completely explain this configuration in our instructions, the customer will ultimately be responsible for removing or disabling their own or third party anti-virus software or firewalls that will block the port required for you to log into our flashing server (see the link to our instructions below to determine whether or not this is something you'll be able to do). Basic technical support provided by JHM to help install these programs on your computer, diagnose programs with your computer, and/or internet connection may be subject to an hourly fee. Additionally, if something happens to your ECU during the flashing process, you should be able to restore it using our software. If you are still unable to make the ECU flash properly, you will be responsible for all costs associated with restoring your ECU and fixing the issue.

Requirements for Tune: 
- Windows computer with at least 1 USB (Universal Serial Bus) port 
- Wired Broadband Internet Connection (wireless can be unreliable) 
- JHM Tuning-Flashing Cable (Flash cable length cannot extend beyond 10 ft long unless a powered USB hub is installed in-line. 
- Battery Charger or equivalent power source capable of sustaining a 40 amp charge