205+ Horsepower – Simple Plug-and-Play Power on 91 Octane Pump Gas / Includes Clutch Kit / Intake and Charge Tube.
Unlock the full potential of your Ski-Doo 850 Turbo with Straightline Performance’s Competition ECU Flash packages. By recalibrating your factory ECU, we deliver maximum horsepower, unmatched throttle response, and reliable pump-gas performance—all with simple plug-and-play installation through your diagnostic port.
Up to 205 Horsepower Output – Unlock massive gains from your Ski-Doo 850 Trail Turbo with a recalibrated ECU.
Plug-and-Play Installation – Quick and simple flash through your factory diagnostic port; no wiring or splicing required.
91 Octane Pump Gas Compatible – Maximum horsepower on fuel you can find at any local station.
Reflash of Stock ECU – No need for additional boxes or piggyback systems; uses your existing ECU.
Competition-Calibrated Mapping – Precision tuning for throttle response, boost control, and reliability.
Stage 1 Flash Option – 205+ HP performance package available (SKU 141-111).
Clutching Compatibility – Optimized for performance clutching setups; clutching adjustments required if a kit is not purchased.
- Clutch kit with all calibrations setup for the new HP. https://straightlineperformance.com/product/ski-doo-mxz-x-rs-850-turbo-r-performance-trail-clutch-kit-0-3000ft/
Charge and Intake Tubes https://straightlineperformance.com/product/2020-to-current-gen-5-skidoo-850-turbo-silicon-intake-kit/
Benefits
Maximum Power, Zero Hassle – Get competition-level horsepower without complicated installs or race fuel requirements.
Reliable Daily Performance – Ride hard with confidence on 91 octane pump gas — perfect for both trail and mountain riders.
Improved Throttle Response – Sharper, more responsive feel for aggressive acceleration and quicker pull.
Proven Straightline Performance Tuning – Backed by years of dyno testing, race development, and snow-tested results.
Future Upgrade Path – Start with Stage 1 at 200+ HP and upgrade to higher output flashes as your setup evolves.
Additional Features with the Straightline Flash for NO extra Charge
Diagnostics
Read and clear fault codes directly from your ECU.
View real-time system status to quickly identify problems.
Saves you time and money by eliminating guesswork or unnecessary shop visits.
Data Logging & Performance Recording
Record live engine parameters such as boost, RPM, throttle position, temperatures, and more.
Save runs for review and fine-tuning.
Great for racers and enthusiasts who want detailed insight into performance.
Export logs for deeper analysis on your computer or to share with your tuner.
- Example download of the Data Aquisition
Plug & Play Simplicity
No laptop required – all functions are done directly on your cell phone.
Easy-to-use interface with clear menus and navigation.
Compact and portable – bring it with you anywhere.
In short: This ECU flash transforms your Ski-Doo 850 Turbo into a true powerhouse — with instant, reliable horsepower gains and the confidence of proven tuning expertise.
Check out the Video..
Ski-Doo 850 Turbo Competition Tune – 205 HP ECU Flash | Straightline Performance
Here’s a look at our Ski-Doo 850 Turbo running the Straightline Performance Competition ECU flash — 205 horsepower with our sound muffler and intake tubes. This setup flat-out rips, running a 5.82 at almost 113 mph in 660 feet down at Martin, Michigan.
SLED at the Scale in Martin was 760lbs. Full Ride Weight – No Lightweight Cheating!
This is the same flash we run on our own sleds — proven power, clean sound, and strong pull all the way through.
Setup:
Straightline Performance 205 HP ECU Flash
Straightline Vari-Sound Muffler
Straightline Intake Tubes
If you want a setup that runs hard and sounds right, this is it.
#StraightlinePerformance #Skidoo850Turbo #SnowmobileRacing #205Horsepower #MartinMichigan
