Dynamometer
Custom Dyno and EFI Tuning
Get the power as it is meant to be
Compared to carburetors, Electronic Fuel Injection (EFI) systems have the ability to meter fuel and adjust to varying temperatures, air pressures, and vehicle loads with fantastic precision. In order for it to do it right, it needs help with one unknown - the volume of air that is entering the engine. This is the limitation of both the Speed Density and Alpha-N type fuel injection systems. Until a Mass Airflow (MAF) sensor is adapted to a Harley, a dynamometer and wide band oxygen sensors are the indispensable tools used to educate the EFI with the missing component: volumetric efficiency (VE).
The Experts On High Performance
Get it straight and the results will amaze you
Not just at wide open throttle, but everywhere. Part throttle, cruising, accelerating, idling, uphill, downhill - it always works right. Great throttle response, optimal fuel economy, no excessive engine temperatures, no pinging, no hesitation, no popping, no misfires - these are the results of a properly calibrated fuel management system.
The Speed/Density EFI is the best available. Alpha-N systems simply can not provide precise control over the fuel delivery and the timing in the same way. And no other system even comes close to the fine tuning of each mode of operation that the Delphi system is capable of.
From stock to the most radical builds, there is no better choice.
*ONLY IF YOU HAVE RDRS:
Stock on all 2020 LiveWire™, CVO™, Police and Trike models and optional on all 2020 Touring models in the U.S. (except Electra Glide® Standard Model) is the Reflex™ Defensive Rider Systems (RDRS) – but not every bike is equipped with this. If the upper half of the space on your horn button is blank, you do not have it (see photo, click for video).
UPDATE: Now on late 2023up Softails
Whenever power output from the engine is increased, the RDRS system must be re-calibrated in order for the new performance to be utilized. This can be done using the TTS Mastertune and requires an additional 2-4 hours of run time on the dyno on top of standard tuning.
Because the RDRS system is integrated with all of the control systems on the motorcycle, the torque request system and resulting limitations cannot be disabled without causing error codes that cannot be cleared. Tuning is a must.
EFI Basic Tuning Schedule
Carbureted Basic Tuning Schedule
Understanding EFI
Our favorite M8 bolt in cam – TTS175
All areas of operation from idle to wide open throttle are analyzed and corrected
Timing issues are identified and corrected
The magic of nitrous oxide
Proper sensor location is critical for best results
Cam choice is critical
How a “bolt-in” cam can wake up an engine
Refinement continues until all targets are reached
Measured values from NTK/NGK wide band free air calibrated sensors
Base maps leave much to be desired
The magic of nitrous oxide
Rich condition in upper rpm range identified and corrected
Raw data recorded during a sampling session shows work needed
A base map that had lean values that would threaten break-in
A base map showing problems with fuel and timing
Properly sized injectors
The raw data alongside recorded run
Proper mixture means more power
Very common and dangerous “canned” base map = poor results
MAP is calibrated, fuel is close, timing needs work
Bolt-in cam only before and after
Perfect flat torque curve from a great combination and tune
Bikes come in regularly with poor tunes
The white cells indicate goals are met
When the injectors are too small they work harder
The tune is the best money spent on every build
Money wasted on limited capability devices