DESCRIPTION
| ECU Power Stage | HP | WHP | Fuel (Octane) | Recommended |
| Stock | 110 | 91 | 91 | Stock or Aftermarket |
| Stage 1 | 114.5 | 96 | 91 | Stock or Aftermarket |
| Stage 2 | 117 | 97 | 91 | Aftermarket Exhaust |
| Stage 3 | 120 | 99 | 91 | Aftermarket Exhaust & Intake |
EVP dynoed and tuned the RS1 to increase power by adjusting timing, fueling, torque limits, rev limits, and speed limits. Fan-on temperature was lowered by 20 deg F and can be set per customer. EVP applied its Polaris Bosch ECU expertise to the 1000/900/925T engines to improve drivability.
- Revised decel fueling to eliminate lean pop with aftermarket exhausts
- Raised rev limiters
- 100% throttle available
- Improved throttle response (e-gas settings)
- Ignition timing advanced for 91 octane
- Fueling adjusted for intakes, exhausts, and cat deletes
- No piggyback fuel controller needed for most bolt-ons (owner must ensure compatibility)
- Engine speed torque limiters removed ("Shaft Saver delete")
- Vmax delete (speed limiter removed)
FITMENT
2018-'22 Polaris RZR RS1
Manufactured by Evolution Powersports. Official specs and resources: EvoPowersports.com.
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