Dynojet POWER COMMANDER III

 Harley Davidson Models
 Power Commander III USB
 

2008 Harley Touring model Power Commanders #818-511 are now in stock and shipping!  We have already developed an exceptional map database and will continue to expand for more and more combinations.

IN STOCK NOW!     
 Call Jamie Toll Free at 877-729-4754 or email for immediate pricing

Fuel Moto is the #1 Top Selling Power Commander dealer in the USA.
Fuel Moto is continually testing Harley Davidson motorcycles and we develop Power Commander maps to support all EFI Harley models. We have the largest Power Commander map database in the USA and have excellent maps available for many exhaust/air filter combinations. We take pride in creating the best maps on the planet by combining our state of the art Dyno facility with latest Dynojet Tuning link software, our proprietary data recording equipment along with our passion for tuning. Each combination is thoroughly tested and tuned to provide optimum overall performance and real world drivability. The 07-08 bikes make very good HP and Torque. We have found that with replacing the air cleaner and exhaust creates a major lean condition 15:1+ A/F with the stock EFI which is even leaner than we typically see with the earlier models.  The good news is that the Power Commander easily corrects the A/F ratio and we have seen significant gains on these bikes. This is a very easy install in these bikes and the 07-08 bikes (also 06 Dyna) include O2 sensor eliminators. We also have installed the Power Commander on completely stock bikes ih excellent results. Engine temperature and exhaust pipe temperature will be substantially lower after installing the Power Commander, we have seen a 25-50 degree reduction in outer exhaust pipe temperature as checked with a infrared pyrometer. 
 

  Free Power Commander Programming!

Free Extended - Double warranty!

Unmatched In-house tech support!

Free unlimited map support with exclusive access to our map database!

Excellent price and unmatched customer service!

Fastest shipping on the planet!

2007 Harley Street Glide before and after runs. The Power Commander added peak 5.5 HP and 5 ft lb. torque. Note the extra RPM's from the Power Commanders Rev Xtend feature
 

This run was made at 20% throttle. Note the super lean condition with the stock EFI. This translates to surging, low power and in extreme conditions engine problems. With the Power Commander it is these cruise area's where you will see the Power Commanders real performance increase from the ability to correct this lean condition. You will see better throttle response, HP and TQ.

Front and rear O2 sensor eliminators installed

Because of the large amount of questions I receive about the O2 sensors and all of the incorrect information we have seen on the 07-08 Harley EFI, I will further explain how the closed loop EFI system works on the Harley Delphi system and why Dynojet has developed the Power Commander with O2 sensor eliminators. First I will start by explaining how the narrowband O2 sensor works. Keep in mind the O2 sensor is only one of the many sensors which monitors engine functions in the speed density system and with the O2 sensor eliminators installed your EFI system will continue to constantly adjust for changing conditions as you ride such as temperature, altitude, humidity, etc.. based on the ECM's programming and lookup tables which are very accurate at providing the proper fuel and ignition timing requirements for the stock components (although the calibrations are very lean which is why we are tuning in the first place). The O2 sensors are not used to calculate fuel requirements, it is simply a feedback device to ensure the air fuel ratio in the cruse areas is within EPA requirements to maintain a 14.7:1 A/F ratio.  The narrowband O2 sensor can only accurately measure a small area within 14.7:1 stoichiometric air/fuel ratio range and works by providing a voltage signal to the ECM which then will continuously monitor the stoichiometric mid point crossover and adjust accordingly until the A/F is in the 14.7:1 range. The ECM is only using the O2 sensor feedback signal when the system is in closed loop mode. Closed loop mode occurs only under certain conditions which are light load, steady speed part throttle, constant mode below approx 40% throttle. It is only after these conditions that the will EFI go into closed loop mode and the ECM will adjust until the O2 crossover point is in the 14.7:1 A/F range. Simply put, an narrowband O2 sensor only works for adjusting low load/cruise area and does not work well in performance applications because it can only monitor a small area within the stoichiometric A/F range. With that being said, yes the stock EFI can adjust itself on the these Harley models. That is if you consider the small amount of time it is in closed loop, and then when the ECM is able to adjust A/F it can only adjust it within the 14.7:1 range which is WAY too lean. For reasonable performance and drivability this 14.7:1 A/F is extremely lean and this is the reason for the 07-08 bikes to run very hot with poor drivability. This condition gets even worse when you change your exhaust or air cleaner. Optimum A/F ratio for cruise area is 13.4-13.8:1 and 12.8-13.2:1 for wide open throttle. When you install an aftermarket EFI module (regardless of manufacturer) for the ability to tune below 40% throttle you will need to utilize O2 sensor eliminators. This will prevent the EFI from going into closed loop mode and you will be able to tune to an optimum A/F ratio for the bike to run properly, otherwise the stock O2 sensors and closed loop mode will try to lean the mixture within the 14.7:1 range. Even with the Harley Screamin Eagle Race Tuner in which you can retain the O2 sensors, again you can still only work within the stoichiometric range which is the only voltage the O2 sensors can measure. Dynojet certainly has the technology to develop a Power Commander for the Harley models with a Wideband sensor that replaces the stock O2 sensor which would be able to tune in real time to target A/F ratios, Power modes etc.. although with the relatively simple design of the Harley/Delphi injection the current Power Commander USB is more than capable of adjusting what we need to adjust at the moment.  Keep in mind in Japanese applications the Power Commander is widely used as well in EFI systems that are far more complex than the Harley Delphi system with technology such as Dual ECU's, computer controlled secondary throttle blades,  multiple staged injectors for each cylinder, fly by wire throttle and servo operated variable intake length. From our experience tuning bikes everyday we know the Power Commander is the best EFI module available and works like no other to effectively adjust the EFI in the full range of RPM's and throttle positions, including the light load/steady cruise areas. Keep in mind that our maps are developed using different modes for light load/cruise area and for upper RPM full throttle performance. We have seen excellent results on the these bikes and with these mods you will see substantial performance and cooling which will increase your riding enjoyment. I hope this has helped with any questions.
Thank you.......Jamie