JH Motorsports is proud to release our JHM C7 RS7 and D4 S8 4.0T ECU and TCU Software!

Our Stage 1 and 2 performance ECU and TCU software is specifically designed to work in harmony together maximize the engine power output capabilities.  With extensive research and testing, we have created the ultimate software for your car. Our tuning will give your RS7 or S8 improved throttle response, higher shift points,  and more power throughout the entire RPM range leading to faster acceleration and a much more rewarding and refined driving dynamic.   

Our software for the 4.0T has been developed and refined over years of daily driving and abuse by our engineering team to take the guesswork out of the equation on what tune combo is best. One cable, one flashing suite for both ECU-TCU to get optimal performance. Our transmission tune is optimized with left foot braking to fully stall the converter for the most aggressive launch you are comfortable doing based on tires, traction, etc. Or you can just roll into it.

This is a one-and-done solution with only ONE Flashing Cable Required (JHM Power-Connect) and can be flashed in the convenience of your own home with an internet connection. To make this even better, upgrading to Stage 2 and 3 are free! 

By making an ECU and TCU combination that works together we were able to do the following for your C7 RS7 - D4 S8 4.0T:

• Engine Rev limit increased to 7200 rpm
• More aggressive throttle control
• Increased shifting speeds
• More assertive shifting in Sport mode and after launching
• Launch Stall RPM raised from ~2000 to ~3000 (outside factors can alter this result)
• 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 - For stock vehicles

• Stage 2 - For vehicles with Catless Downpipes or HFC

• Stage 3 - COMING SOON

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: JHM RS7-R Turbos, JHM Downpipes and Stock Catback, 91 Octane Fuel - Full Weight

MODS: JHM RS7-R Turbos, JHM Downpipes and Stock Catback, 93 Octane Fuel - Full Weight

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