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ENGINE TUNING

Tuning strategy

  • The tuning system focuses on Harley-Davidson engines equipped with DELPHI EFI (diagnostic communication J1850 or CAN)
  • The tuning system is based on diagnostic system DIAG4BIKE. DIAG4BIKE is the professional diagnostic tool for Harley-Davidson Motorcycles. The tuning software DIAG4TUNE is included in the diagnostic software from Version 12. To tune an individual motorcycle a TUNING DONGLE (or EASY TUNING DONGLE) must be purchased that can be used for that specific motorcycle. It is recommended to use last version of DIAG4BIKE software for diagnostic or tuning.
  • The tuning process does not require the installation of additional component(s) or any motorcycle harness modification. Tuning is based on the modification of EFI Calibrations (software modification) exclusively via the diagnostic connector.
  • The first step in Tuning is storage of the original EFI Calibration. The tuning operator can restore the original EFI Calibration at any time during tuning process (stock calibration).
  • The tuning process is used to optimize Fuel Maps in case of any changes to the configuration of engine components or accessories (exhaust or/and intake system etc.) .

 

Available tuning methods

1. Easy tuning - manual adjustment

This method is the low cost tuning represented by EASY MODE in tuning software DIAG4TUNE. EASY MODE provides theability to adjust Fuel Trim table, Acceleration Enrichment, Spark Advance table manually in a limited range of +/- 20%, switch On/Off Lambda Closed Loop and Throttle By Wire speed up. Other functions are restricted.

Necessary Tuning Components:
DIAG4BIKE (functional set)

Easy tuning dongle

DIAG4BIKE (functional set) AT531 4094A - Easy tuning dongle

Easy tuning - User manual

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2. Advanced tuning - map flashing from database

By this method of the tuning is possible to use full range of DIAG4TUNE functions. The method provides ability to use an embedded database of calibrations. These calibrations (maps) are pre-set for several configurations of exhaust and intake components (openexhaust, intake and combinations). Advanced tuning method provides important improvement of engine functions. The best engine efficiency is possible to rich only by using PROFESSIONAL TUNING method.

Necessary Tuning Components:
DIAG4BIKE (functional set) Tuning dongle
DIAG4BIKE (functional set) AT531 4094 - Tuning dongle

Advanced tuning - User manual

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  see section User manual
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3. Professional tuning - engine fuel maps optimization

By this method of the tuning is possible to use full range of DIAG4TUNE functions. The key function is here VOLUMETRIC EFFICIENCYMAP MEASUREMENT under load. It means real VE maps measurement of each engine configuration. VE map measurement can be done onan appropriate Roller Station, good example is SMART POWER BENCH, or during Road Test on the street. Professional tuning method provides the best bike tuning for each special engine - maximal efficiency, torque and power.

Necessary Tuning Components:
DIAG4BIKE (functional set) AFR Tuning monitor
DIAG4BIKE (functional set) AT106 4016 - AFR Tuning monitor
Tuning dongle  
AT531 4094 - Tuning dongle  

Useful Tuning Components:
Smart Power Bench (SPB) Throtle control limiter
AT531 4098 - Smart Power Bench (SPB) AT531 4097 - Throtle control limiter
Installation set Lambda Installation set Lambda in case
AT106 4020 - Installation set Lambda  
Installation set Lambda MINI Installation set Lambda MINI in case
AT106 4064 - Installation set Lambda MINI  

 

Tuning Components - description

 

Engine tuning - Brochure

Open prospectus
Open prospectus
Link will be opened in new window Engine tuning
Open prospectus
(two sides)
   
  December 8, 2016 (3 MB, pdf)
   

 

DIAG4BIKE & AFR TUNING MONITOR - connection

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  see section User manuals
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Installation set Lambda - User manual

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  see section User manual
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Installation set Lambda Mini - User manual

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  see section User manual
Go to page: User manuals