At $300 a pop to have one flashed by a company time and time again it would get expensive. These are "Married" to one ecm, meaning you can only reprogram the original ecm it was used for. Most of these come with premade maps you can install and let you tweak them or make your own. If you are planning on doing mods later you might consider buying the hardware that lets you reflash one ecm with a laptop or home computer as many times as you want. Maybe someone who has done one will chime in. This can be used for actual performance measurements, but can vary by the drivers reaction time.I myself have never done a stock machine, but I would imagine it would make it run smoother and with different timing and fuel curves give it a little more zip. In addition to the performance dyno testing, we also did a 1/8th mile test which is a feature of the Mustang dyno. Improved ignition and fuel mapping along with the torque limiters removed help give the Yamaha a much better response down load. With the tune, we raise the rev limiter to be at 10,500 in all gears and lift the speed limiter. Peak numbers show the tuned file at 81 rwhp and 60 ft/lbs of torque. Horsepower stays consistent in it’s gain to the top end. The new VR Tuned ECU flash for the YXZ1000R produces about 5 rwhp and 5 ft/lbs of torque at the mid-range 40-50 mph mark. More importantly, if you add higher octane fuel or octane booster, the vehicle will gain power and run much better.Īfter some initial dyno tests, we found a good mix of calibrations to give the Yamaha YXZ1000R a gain over stock. When you do run other mods such as an exhaust and intake, the ECU will adjust for those. The Mustang Dyno will always read much lower than others, but its the gain that counts in the power curve. However on the SXS we have been seeing a 30% drivetrain loss which is consistent here with our Polaris RZR tests. We typically factory in a 15-20% drivetrain loss for 2 wheel drive vehicles. On 91 octane and with an ambient temperature of about 90F, our readings are pretty accurate. Our baseline of the Yamaha YXZ1000R was 78 rwhp and 58 ft/lbs of torque. The dyno simulates a rolling road test and puts a load with a correction factor to the vehicles results. This dyno has a load cell that gives you the best and closest real world results. When testing at our Gilbert, AZ facility, we test on a Mustang All Wheel Drive Dyno. However, unlike the Polaris in doing a start and stop test, this allows us to test in a close 1 to 1 gear which is 4th on the dyno. The manual transmission really puts a new element of driving a SXS to the test. Like a dirt bike, you can bang through the gears once at speed but it requires the clutch pedal to get going or to use when stopping. What really separates this SXS from others like the Polaris is the sequential transmission featuring a multi-plate clutch and flywheel. It is much more linear and revs out higher. The Yamaha is more like a car or a bike on how the horsepower and torque curves come into play. It is really difficult to compare these 2 vehicles though. Coming stock with 112 horsepower, it makes just 2 horsepower more than the latest Polaris RZR 1000 at 110 horsepower. ECU Tuning the Yamaha YXZ1000R is a great way to improve the performance of the 998cc, 3 cylinder engine.
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