Agricultural · ECU Remapping
John Deere Harvester Sts Series 9660 STS 8.1L I6 304 hp Tuning (2001–)
Factory specification and Stage 1 remap gains for the John Deere Harvester Sts Series 9660 STS 8.1L I6 304 hp (2001–). A Stage 1 calibration adds 31 BHP and 98 Nm — software only, no hardware modifications required.
| Measure | Original | Stage 1 |
|---|---|---|
Power BHP | 304 | 335Estimated +31 BHP · +10% |
Torque Nm | 972Estimated | 1070 +98 Nm · +10% |
+31 BHP
Stage 1 power gain (estimated)
+98 Nm
Stage 1 torque gain (estimated)
Estimated figures are based on engine, ECU and comparable application data. Actual results can vary depending on software version, machine condition and configuration.
Rolling road
Dyno Graph
Power (BHP, solid) and torque (Nm, dashed) across engine speed (RPM). Peak figures match our database exactly.
Hover / touch the graph
Stock: 304 bhp · 972 Nm (peak)
Stage 1: 335 bhp · 1070 Nm (peak)
Tuning tool compatibility
This ECU was not found in the manufacturer compatibility databases we cross-reference.
AutoTuner
Not listed in this manufacturer's data — ask us, coverage updates frequently.
Alientech KESS3
Not listed in this manufacturer's data — ask us, coverage updates frequently.
Magicmotorsport FLEX
Not listed in this manufacturer's data — ask us, coverage updates frequently.
Dimsport New Genius / New Trasdata
Not listed in this manufacturer's data — ask us, coverage updates frequently.
Existing customers upload their ECU file via the Regal Tuning File Portal. New to Regal? Request a quote first.
20+ years of ECU calibration
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Tell us your machine and registration — we'll confirm support and the exact expected gains for your engine before any work begins.