Koweta Custom Cycles
Dynostar
  Koweta Custom Cycles provides expert Dyno tuning services. We tune all types of race ready motorcycles and ATV’s, as well as, provide custom built maps that will improve the way your motorcycle or ATV performs.

A Dynamometer is essential to realizing the full potential of today’s fuel injected and carbureted motorcycles/ ATV’s with performance modifications. This is the only tool that can accurately calibrate fuel and ignition maps or diagnose run/drivability issues in a controlled environment. We have technicians that are trained to tune Screaming Eagle Race Tuner, Power Commander and Carborated motorcycles and ATV’s. We also tune many other after market devices.

  
  The DynoStar Dynamometer that we have is completely state of the art which allows us to tune tighter and quicker. This results in better performance for less money. Unlike most shops, we use dual air fuel analyzers, which allows for both cylinders to be tuned at the same time. Not only is this dynamometer incredible for obtaining the most out of your motorcycle or ATV, but it also allows the mechanic to diagnose problems that might not have been found during a test drive. This not only saves time but also saves you money.  
 
Understanding Fuel and Ignition Requirements
  
  The simplest way to look at the internal combustion engine and understand what is done to increase performance is to see it as an air pump. The more air it is capable of pumping at any given time, the more power it will make (expressed as Volumetric Efficiency or VE). To get the most energy out of that air, it relies on accurate metering of fuel to that air (expressed as stoichiometric, an AFR of 14.7:1 is the theoretical ratio that results in the greatest release of available energy in gasoline). Real world inefficiencies result in an air/fuel ratio (AFR) of 12.8:1 to 13.3:1, for best power and 14.5:1, for best mileage. Keeping the AFR around 13.8 under load, get the best of both worlds.

 

The VE, AFR and tuning requirements constantly vary as determined by the mechanical and dynamic properties of the motor. The main mechanical parts are typically engine size (volume), compression ratio/cylinder pressure, cam timing/lift, port/valve flow capacity, exhaust and NOS/super/turbo charging.

The exhaust system is the largest, single, variable influence on how the motor processes air, the shape of the VE graph and tuning requirements. The dynamic parts are typically RPM, throttle position and load (including wind, tire pressure, terrain, gearing and luggage).

  
Ignition requirements are dictated by engine design properties such as exhaust, cam profiles, piston/combustion chamber shape, piston/head clearance, cylinder pressures, rpm limits, fuel quality and intended use.

On carbureted motorcycles and ATV’s we adjust air/fuel ratios by replacing the replace pilot jets, main jets, emulsion tubes, needles and make float height adjustments as required. . We use only the top of the line performance parts and kits.

Fuel Injected Motorcycles have throttle bodies and fuel injectors driven by the ECU and its programming or calibration. We are able to recalibrate the ECM through the use of a tuning module such as a Screaming Eagle Race Tuner, Power Commander or other aftermarket tuners. We have had great success with the Screaming Eagle Race Tuner and the Power Commander on everything from top end race bikes and ATV’s to your every day motorcycle and ATV. Koweta Custom Cycles Inc. is one of only a few places that you can go to have a Screaming Eagle Race Tuner tuned correctly. Most shops will not even tune it because they either do not know how to, do not have the equipment or it just takes them to long because their equipment is not as state of the art as the DynoStar Dynamometer. We are very accurate and quick because of the state of the art dynamometer that we have.
 
Screaming Eagle Race Tuner ®
  
  The Screaming Eagle Race Tuner allows direct access to the ECU programs and their modification. We are, in affect, creating custom calibrations for specific combinations. The Race Tuner does, however include many SE calibrations in the map files to select from. These can then be modified or a completely new file created if the combination does not match the calibrations part description. Race Tuner provides a much higher level of tuning than any other device without replacing the ECU itself. Each cylinders fuel and ignition mapping is independently tuned resulting in a custom map that eliminates the possibility of one cylinder fighting or holding back the other.

 

This equals more horsepower with smooth linear drivability. In addition, warm up enrichment, idle speeds, IAC steps, rev limits, AFR offsets, injector sizing can be changed. To help in tuning or diagnostics, Race Tuner also features a data mode to collect and review sensor inputs or other data. Both of these can only be tuned accurately by using a real time AFR monitoring.

  
 
Power Commanders ®
  
  The Power Commander® modifies injector pulse width, ignition timing, front/rear cylinder fuel percent offset, acceleration fuel enrichment as a device that plugs into the factory ECU harness. The Power Commander also allows for each cylinders fuel and ignition mapping to be independently tuned resulting in a custom map that eliminates the possibility of one cylinder fighting or holding back. There is no permanent change made to the ECU. The removal of the Power Commander will return it back to the original configuration.

 

If you are just interested in your motorcycle/ATV is performing then we can perform a Base line. The Base line will tell you the Torque, Horsepower, and Air fuel ratio (AFR) at full throttle.

When we tune your motorcycle/ATV it will be tuned at many different throttle positions. This will improve the readability and efficiency of the motorcycle/ATV.

Whether or we perform a Base line or a complete tune, you will have a printed Map of you motorcycle/ATV for bragging rights. The bottom line is that tuning your motorcycle/ATV one of the best things that you can do for it.