Stage 1

John Deere 8R Series All years 8320RT 320hp (235kW) 1419Nm Stage 1

Takes the 8320RT 320hp (235kW) 1419Nm from 320hp to 355hp, and 1419Nm to 1585Nm.

+35horsepower
+166newton metres

Where the gain arrives

Scaled from the manufacturer curve for this engine.

Power before and after
09619228838301,2001,6002,0002,400 RPM 09619228838301,4002,0002,600hp RPM
  • Standard 320hp
  • Remapped 355hp
Torque before and after
04288561284171201,2001,6002,0002,400 RPM 04288561284171201,4002,0002,600Nm RPM
  • Standard 1419Nm
  • Remapped 1585Nm

Standard against Stage 1

MeasureStandardAfterGain
Power320hp355hpup 35
Torque1419Nm1585Nmup 166

What Stage 1 involves

Stage 1 is for a standard car with nothing fitted. We read the original file off the ECU, write a calibration developed for the 8320RT 320hp (235kW) 1419Nm, then road or rolling road test it before handing the car back. Nothing is added and nothing is removed, so it looks and services exactly as it did.

It takes most of a day. We keep your original file, so it can go back to standard at any point. Figures here are for a healthy 8320RT 320hp (235kW) 1419Nm, and we check the car over before writing to it.

See the full 8320RT 320hp (235kW) 1419Nm page for every file and figure, the other engines on this 8R Series, or all John Deere remapping.

Book your 8R Series Stage 1

We write and test every file at our Aston workshop, on our own rolling road. Ring us with your reg and we will tell you what your car should make before you commit to anything.