VQLab
R35 · 2009–2010

Nissan GT-R ECU tuning

Back up, tune and flash the GT-R's VR38DETT through the OBD port, with VQLab and a $10 K-line cable. No ECU to open.

Download Lite, freeSee Pro
Nissan GT-RExperimental

Maps decoded, but flashing is untested: GT-R ECUs are usually flashed over CAN, not K-line. Back up and explore maps first.

Supported ECU software versions

Software IDFitted to
JF51AGT-R 2009, VR38DETT
JF33BGT-R 2010, VR38DETT

Not sure which one your car has? VQLab Lite reads it from the ECU when it connects, for free.

What you can tune

VQLab shows the GT-R's maps as editable heatmap grids, with undo, compare and smoothing. Depending on the ECU software version, they include ignition timing, fuel targets, rev and speed limiters, airflow (MAF) scaling, injector settings and cam timing. What each map does.

How to start

  1. Get a K-line USB cable with a CH340 chip, about $10 (which cable).
  2. Back up your ECU with VQLab Lite. It's free and changes nothing in the car.
  3. Open the backup and look through every map.
  4. To edit and flash, get VQLab Pro: a one-off payment, 5 cars included.

Questions

These ECU software versions: JF51A (GT-R 2009, VR38DETT), JF33B (GT-R 2010, VR38DETT). VQLab Lite reads your ECU's software ID when it connects and tells you whether it's supported.

A K-line (KKL) USB cable with a CH340 chip, sold as a "VAG 409.1 KKL" cable for about $10. FTDI cables don't work.

No. VQLab reads the ECU through the OBD2 port under the dash. Flashing this car over K-line is still untested, so back up and explore the maps first.

Backing up and viewing every map is free with VQLab Lite. Editing and flashing needs VQLab Pro, a one-off payment that includes 5 cars.

Other supported cars