{"product_id":"aftermarket-assassins-25-polaris-ranger-xp-1000-rtd-ecu-custom-tunes","title":"Aftermarket Assassins '25+ Polaris Ranger XP 1000 RTD ECU Custom Tunes","description":"\u003ch4\u003e\u003cstrong\u003e\u003cspan data-sheets-root=\"1\"\u003eAftermarket Assassins '25+ Polaris Ranger XP 1000 RTD ECU Custom Tunes\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eLooking for the best\/most badass ECU tuning available for your 2025 Ranger XP 1000? AA's performance tunes are readily available to gain horsepower and torque.  Through our advanced ECU tuning we are able to modify parameters correctly to gain you the power needed.  We are highly experienced in tuning UTV's and this will show.   We were the first to flash the Polaris MG1 ECU, and spent a huge amount of time in R\u0026amp;D to develop the most powerful ECU calibrations (tunes) possible. If you're unsure if your Ranger is an EVAP model or not, check your Emissions Control sticker located on the front driver's side frame rail above the shock. See pictures for location.  Normally the ECU also has a sticker on it giving you\/us this information.\u003c\/p\u003e\n\u003cp\u003eWhy AA tunes over others?  We have been tuning UTV's with CVT clutches for a long time, longer than almost anyone in our field going back to the 800 RZR.  Tuning a CVT vehicle properly is not an easy task as you have so many variables at one time.  We spend the time to wheel dyno(with actual UTV tires) correctly per modification, and have advanced ECU calibration and clutching knowledge to do so. Every change in horsepower can result in us changing clutching several times. We also develop most of our supporting mods so we know everything works correctly, and build parts to fit the vehicles needs.  Lastly and honestly the most important; we then back up our results with real world data logging on local trails and our facility on 110 acres.  It's this combination that truly makes the difference and why AA normally has a faster vehicle with the same or less rated tune horsepower. Looking for race fuel tunes?  We were also, but unfortunately we found no real power increase by adding octane.  Certainly a little extra octane is never a bad thing to keep your ECU from pulling timing based on engine knock, but we tried various attempts to make more power with no significant results.\u003c\/p\u003e\n\u003cp\u003e\u003cu class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-1h c2-7x c2-80\"\u003e\u003cstrong class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-71 c2-7x\"\u003eLevel 1 87 Octane\u003c\/strong\u003e\u003c\/u\u003e:  This tune can be run on a bone stock Ranger on 87+ octane fuel.  This tune adds +3 RWHP (4-5 crank HP) putting you at roughly 88 crank horsepower with just a flash!  Add clutching and you are a huge 8-9rwhp above OEM!   We would highly suggest our S3 clutch kit with this tune as it loads the Ranger better down low for torque, allows peak RPM to ramp up faster in the mid\/high end, and has slightly higher peak RPM for better peak power. This tune can be run with an aftermarket exhaust without any issue, but our Level 2 tune is the best option for aftermarket exhaust as it's slightly richer for more power and less heat.\u003c\/p\u003e\n\u003cp\u003e\u003cu class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-1h c2-7x c2-80\"\u003e\u003cstrong class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-71 c2-7x\"\u003eLevel 1 91-93 Octane\u003c\/strong\u003e\u003c\/u\u003e:  This tune can be run on a bone stock Ranger on 91-93 octane fuel.  This tune adds +5 RWHP (7-8 crank HP) putting you at roughly 90 crank horsepower with just a flash!  Add clutching and you are a huge 10-11rwhp above OEM!   We would highly suggest our S3 clutch kit with this tune as it loads the Ranger better down low for torque, allows peak RPM to ramp up faster in the mid\/high end, and has slightly higher peak RPM for better peak power. This tune can be run with an aftermarket exhaust without any issue, but our Level 2 tune is the best option for aftermarket exhaust as it's slightly richer for more power and less heat.\u003c\/p\u003e\n\u003cp\u003e\u003cu class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-1h c2-7x c2-80\"\u003e\u003cstrong class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-71 c2-7x\"\u003eLevel 2 87+ Octane\u003c\/strong\u003e\u003c\/u\u003e:  This tune is developed for an Ranger with aftermarket exhaust on 87 or greater octane.  We have fueling and timing added as possible due to the lower exhaust temps and higher flow.  Power gains vary depending on exhaust, but usually we see a massive +8-10hp with our Aa Exhaust.  Due to how these motors\/tuning works, this tune should work with about any aftermarket exhaust, but was tested and designed with our AA Slip-On Exhaust.\u003c\/p\u003e\n\u003cp\u003e\u003cu class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-1h c2-7x c2-80\"\u003e\u003cstrong class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-71 c2-7x\"\u003eLevel 2 91-93 Octane\u003c\/strong\u003e\u003c\/u\u003e:  This tune is developed for an Ranger with aftermarket exhaust on 91-93 octane.  We have fueling and timing added as possible due to the lower exhaust temps and higher flow.  Power gains vary depending on exhaust, but usually we see a massive +10-12hp with our Aa Exhaust.  Due to how these motors\/tuning works, this tune should work with about any aftermarket exhaust, but was tested and designed with our AA Slip-On Exhaust.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eThe drop down also asks if your Ranger has factory HVAC (air\/heat) or the standard model without\u003c\/li\u003e\n\u003cli\u003eBig horsepower gains depending on the level of tune\/modifications (see below tune level descriptions for more details)\u003c\/li\u003e\n\u003cli\u003eMuch quicker throttle response and power delivery giving a whole new feel to the vehicle\u003c\/li\u003e\n\u003cli\u003eThrottle by wire limiters disabled\u003c\/li\u003e\n\u003cli\u003eSeatbelt speed limiter is removed\u003c\/li\u003e\n\u003cli\u003eMisfire detection is desensitized to prevent false misfire codes\u003c\/li\u003e\n\u003cli\u003eStart in any gear (factory will only start in park)\u003c\/li\u003e\n\u003cli\u003e2 Foot limits disabled(gas\/brake at the same time)\u003c\/li\u003e\n\u003cli\u003eFan on\/off at 188\/184 (Stock is 203\/193) degrees Fahrenheit  which is just above the thermostat opening temp.  We also ramp up fan speed quicker than OEM (PWM fan speed increases as engine temps increase)\u003c\/li\u003e\n\u003cli\u003eSpeed limiter removed in high gear (OEM Speed limit in high is 62mph)\u003c\/li\u003e\n\u003cli\u003eSpeed limiter bumped up to 45mph in low(stock 29mph) and 30mph (stock is 25) in reverse\u003c\/li\u003e\n\u003cli\u003eMore throttle % in low gear and reverse (stock limits your throttle for torque limitation)\u003c\/li\u003e\n\u003cli\u003eRev limit at a safe 8800 RPM (stock is 8000).  Ideal peak RPM @ 55mph in a wide open throttle run is 7200-7600 with the flash, but 8800 is for ramp up overshoot\/top speed.  \u003c\/li\u003e\n\u003cli\u003eClutching is highly suggested to achieve best peak RPM and best power output as the OEM clutching will fall short of peak RPM for this motor\/tune.\u003c\/li\u003e\n\u003cli\u003eAA's wicked timing curve is safe for the fuel octane recommended, but we do a much better job of finding timing limits for ramp up\/more torque.  Many others simply focus on wide open throttle timing\/fueling.\u003c\/li\u003e\n\u003cli\u003eAA's modified fuel curve will still get good mileage cruising, but is corrected over the factory lean AFR when needed most on higher throttle inputs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eInstallation Instructions:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/aftermarketassassins.com\/tech-blog\/f\/read-license-flash-with-hp-tuners-vcm-editor#\"\u003eRTD ECU Custom Tunes\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-1h c2-7x c2-80\"\u003e\u003cspan class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-71 c2-7x\"\u003e2025+ Ranger XP 1000 82HP Models\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-71 c2-7x\"\u003e,\u003c\/span\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan class=\"x-el x-el-span c2-1a c2-1b c2-3 c2-7w c2-1l c2-71 c2-7x\"\u003e including 2026+ XP 1000 Cab models.\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Aftermarket Assassins","offers":[{"title":"2025 \/ Model without HVAC","offer_id":50581959835953,"sku":"AA-119-1004-1-AO","price":150.0,"currency_code":"USD","in_stock":true},{"title":"2025 \/ HVAC Model (Heat \u0026 Air)","offer_id":50581959868721,"sku":"AA-119-1004-1-HVAC-AO","price":150.0,"currency_code":"USD","in_stock":true},{"title":"2025 \/ Cali EVAP - without HVAC","offer_id":50581959901489,"sku":"AA-119-1004-1-EVAP-AO","price":150.0,"currency_code":"USD","in_stock":true},{"title":"2025 \/ Cali EVAP - with HVAC","offer_id":50581959934257,"sku":"AA-119-1004-1-EVAP-HVAC-AO","price":150.0,"currency_code":"USD","in_stock":true},{"title":"2026 \/ Model without HVAC","offer_id":53873716625713,"sku":"AA-119-1004-1-2026-AO","price":150.0,"currency_code":"USD","in_stock":true},{"title":"2026 \/ HVAC Model (Heat \u0026 Air)","offer_id":53873716658481,"sku":"AA-119-1004-1-HVAC-2026-AO","price":150.0,"currency_code":"USD","in_stock":true},{"title":"2026 \/ Cali EVAP - without HVAC","offer_id":53873716691249,"sku":"AA-119-1004-1-EVAP-2026-AO","price":150.0,"currency_code":"USD","in_stock":true},{"title":"2026 \/ Cali EVAP - with HVAC","offer_id":53873716724017,"sku":"AA-119-1004-1-EVAP-HVAC-2026-AO","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/5871\/5697\/files\/aftermarket-assassins-25-polaris-ranger-xp-1000-rtd-ecu-custom-tunes_1.jpg?v=1776687541","url":"https:\/\/fueledutv.com\/products\/aftermarket-assassins-25-polaris-ranger-xp-1000-rtd-ecu-custom-tunes","provider":"Fueled UTV","version":"1.0","type":"link"}