Twin Tuner Fuel Injection Controllers for 2001-2014 Harley-Davidson® Twin-Cam and 2007-2014 Sportster® with Delphi® System and 2003-2010 Buell® with DDFI Fuel Injection

 

 

· Increases horsepower

· Improves throttle response

· Easy plug-in installation and setup

· Very compact size - only 4"L x 2"W x ˝"H

· Compatible with Twin Scan II Plus Tuning Aid

· Low cost 

 

For more details on installation and tuning, read the Tech Review articles: More Ways to Adjust Your EFI published in V-Twin Magazine and BUB 7 True Duals published in Motorcycle Bagger Magazine.


Visit the Twin Tuner Tech FAQ for more detailed information about using the Twin Tuner including recommended settings for common applications!

 

Order online using Paypal or call us at 386-304-0700  (Monday-Friday 9 AM to 5 PM Eastern time) for credit card and COD orders. For online orders, please email any special instructions to sales@daytona-twintec.com. 

 

All products covered by our 3 year limited warranty.

 

Part Number Description Suggested Retail
16100

 

Twin Tuner Fuel Injection Controller (for 2001-2011 Harley-Davidson® Twin-Cam with 36 pin Delphi® system and 2008-2010 Buell® with DDFI). Note: Use TWIN-TUNER-SPT for 2011 Softail® models. Not legal for sale or use on pollution controlled vehicles. Not for sale in California. $230.00

16102

 

Twin Tuner Fuel Injection Controller (for CAN bus models including 2012-2013 Dyna® and Softail®  and all 2014 except touring models). Not legal for sale or use on pollution controlled vehicles. Not for sale in California. $255.00

16106

 

Twin Tuner Fuel Injection Controller (for 2014 and later touring models with CAN bus). Not legal for sale or use on pollution controlled vehicles. Not for sale in California. $255.00

16104

 

Twin Tuner Fuel Injection Controller (for 2008-2013 Harley-Davidson® Twin-Cam touring models with 73 pin Delphi® system). Not legal for sale or use on pollution controlled vehicles. $255.00

16105

 

Twin Tuner Fuel Injection Controller (for 2007-2013 Harley-Davidson® Sportster® and 2011 Softail® models with 36 pin Delphi® system).  Not legal for sale or use on pollution controlled vehicles. Not for sale in California. $230.00

16103

 

Twin Tuner EX Fuel Injection Controller (for 2001-2008 Harley-Davidson® Twin-Cam with 36 pin Delphi® system). 50 states street legal (ARB E.O. No. D-641). $230.00

16101

 

Twin Tuner Fuel Injection Controller (for 2003-2007 Buell® with DDFI fuel injection system). Not legal for sale or use on pollution controlled vehicles. Not for sale in California. $230.00

18014 USB Interface (provides USB connectivity for custom mapping. Includes 6 foot USB cable and Windows XP/Vista/7/8 drivers on CDROM).  $79.95

18008

 

Twin Tuner Adapter Harness (allows easy bypass for testing and diagnostic purposes). Not compatible with Twin Tuner FL or Buell versions. Not legal for sale or use on pollution controlled vehicles. Not for sale in California. $44.00

18009

 

Twin Tuner Power Adapter  (12 volt power supply for bench top programming. Not compatible with Twin Tuner FL or Buell versions. 110-240 VAC multi-plug international compatibility) $78.50

18013

Eclipse CP-463 Deutsch Terminal Crimping Tool (for Twin Tuner CAN bus version installation) $39.95

 

 

The Twin Tuner allows you to easily adjust your fuel injection to match the requirements of performance parts including camshafts, free flowing exhausts, and low restriction air filters. You can add up to +30% or subtract down to -20% fuel. 

You can use the mode and up/down pushbutton switches to make fuel trim adjustments in the RPM and throttle position ranges required by most applications. The fuel trim value is displayed on a bright daylight readable LED display. The Twin Tuner also has an advanced mode, where you can use the optional USB Interface and PC Link Tuner software to make precise fuel adjustments. You can make independent adjustments to the front and rear cylinders.

The Twin Tuner works great in combination with the Daytona Sensors Twin Scan II Plus tuning aid (more details below). You don’t need a dyno for precise tuning. All you have to do is install the Twin Scan II PLus and ride the bike around some on a closed course or race track. The Twin Scan software will do the rest.  

Buell® users please note that the standard Twin Tuner works with the 2008-2010 models with the new DDFI module that has two 34 pin Delphi® connectors including the new 1125R model with Rotax engine. P/N TWIN-TUNER-BUELL is for 2003-2007 models with the earlier DDFI module that has two 12 pin Deutsch connectors. 

The new Twin Tuner EX version is 50 states street legal (ARB E.O. D-641). Fuel adjustments with the Twin Tuner EX are only allowed above 60% throttle position or 5000 RPM.  

Download Twin Tuner Instructions

Best Value

We believe that the Twin Tuner offers the best value on the market today. Take a close look at the table below and decide for yourself. 

All trademarks and service marks are the property of their respective owners.

Easy Installation

Installation takes only 10-15 minutes and is very easy, with no splicing, cutting, crimping, or bulky interconnections. All access is at the Delphi® ECM. The pictures below show a typical installation for a 36 pin Delphi® ECM. Installation on 2008-2013 touring models with 73 pin Delphi® ECM and Buell® models installation is similar, but different connectors are used. Refer to the instruction sheets for these models for more details. No special tools are required. Just disassemble the ECM connector using a small flat screwdriver as shown below, remove five wires from the ECM connector, insert these wires into our small mating connector, insert five new wires from the Twin Tuner into the ECM connector, and connect one ground wire. The unit is completely encapsulated and impervious to moisture. With a very low profile of only ˝” and occupying a fraction of the space required by competitive products, you won’t have a problem finding a place to mount the unit.  

 

 

ECM Connector Retainer Removal

 

ECM Connector Disassembly
ECM Connector Terminal Removal Completed Wiring at ECM

 

Basic Tuning

The Twin Tuner has a 10 position rotary mode switch used to select fuel trim parameters to edit, two digit LED display, and up/down pushbutton switches to change the parameter value. Fuel trim parameters are listed in the table below. Note that the rectangular LED to the left of the two digit LED is illuminated for negative values. You can use a small flat screwdriver to rotate the mode switch. You can make parameter changes on-the-fly with the engine running. 

Twin Tuner Mode Switch Settings Table

Parameter Fuel Trim Operating Range
0 Display off – used to prevent inadvertent changes during normal engine operation
1 Idle 750-1250 RPM 0% TPS
2 Low cruise 1250-2000 RPM 2.5-50% TPS
3 High cruise 2000-3750 RPM 2.5-50% TPS
4 Wide open throttle 1250-2000 RPM 50-100% TPS
5 Wide open throttle 2000-2750 RPM 50-100% TPS
6 Wide open throttle 2750-3750 RPM 50-100% TPS
7 Wide open throttle 3750-4750 RPM 50-100% TPS
8 Wide open throttle above 4750 RPM 50-100% TPS
9 Acceleration enrichment (0 = none, 10 = maximum)

 

Twin Tuner EX Mode Switch Settings Table

Parameter Fuel Trim Operating Range
0 Display off – used to prevent inadvertent changes during normal engine operation
1 Wide open throttle 1250-2000 RPM 60-100% TPS
2 Wide open throttle 2000-2500 RPM 60-100% TPS
3 Wide open throttle 2500-3000 RPM 60-100% TPS
4 Wide open throttle 3000-4000 RPM 60-100% TPS
5 Wide open throttle 4000-5000 RPM 60-100% TPS
6 Wide open throttle 5000-6000 RPM 60-100% TPS
7 Wide open throttle above 6000 RPM 60-100% TPS
8 Entire operating range above 5000 RPM 0-60% TPS
9 Acceleration enrichment (0 = none, 10 = maximum)

 

The tables above show the engine operating ranges affected by fuel trim values in terms of RPM and throttle position sensor (TPS) values. To properly tune an engine, you need to know what fuel trim values are required. Tuning guidelines and recommended initial settings for common applications are given on the Twin Tuner Tech FAQ.

Advanced Mode

The Twin Tuner also has an advanced mode, where you can use the optional USB interface and Windows software to check and observe system operation (Tuner Log) and make precise fuel and spark retard adjustments (PC Link Tuner).  Setup files are available for common applications.

Twin Tuner Setup File List

Twin Tuner Setup Files

The setup files are saved as a ZIP archive file that you can download by clicking on the link above. You will require PKZIP to unzip the archive. If you do not have PKZIP installed on your computer, you can download it from the PKWARE Inc. website.

 

PC Link Tuner Software

PC Link software runs under Microsoft Windows XP/Vista/7/8. We no longer support older Windows versions. PC Link allows the user to program all the parameters and fuel trim tables within the Twin Tuner. Minimum PC requirement is a 300 MHz Pentium with super VGA display (SVGA with 1024 x 768 pixel resolution). The Twin Tuner connects to the PC by means of an optional USB interface (P/N USB-INTF). This USB interface also works with all Daytona Twin Tec engine controls (ignition and fuel injection systems). The PC must have a free USB port. Before the engine is started, you can download or upload data with PC Link.

USB Interface

You can edit various tables and parameters. 3D tables are used for front and rear cylinder fuel trim. 3D fuel trim tables are accompanied by chart displays that help visualize the data. With the Twin Tuner EX, the range from 500-4500 RPM below 60% throttle position is locked out and displayed in red. You can print the data associated with an active table or Twin Tuner parameters by using the appropriate Print command from the File menu. You can open and save tuning files to disk. 

 

Data Export and Import by Means of Copy and Paste

You might want to export or import 3D table data to or from another application such as Microsoft Excel and other programs with tables that support copy and paste operations. You can directly copy and paste data to and from the PC Link Tuner program. In the PC Link Tuner program, you can select a range of cells with the mouse and right click to bring up a copy and paste menu. When you paste data into the PC Link Tuner program, the data is automatically checked and any out-of-range data corrected.

 

 Sample Twin Tuner Fuel Trim Table

 

Sample Twin Tuner EX Fuel Trim Table

 

PC Link software is free! You can always download the latest version of the software and instruction sheet from our website. The software will run in demo mode without a Twin Tuner system attached. For your convenience, we include a copy on CDROM when you purchase the USB interface.

Download PC Link Tuner Software and Instructions 

 

Using the Twin Scan II Plus Tuning Aid

The Twin Scan II Plus is a complete kit for engine diagnostics and tuning on Harley-Davidson® motorcycles with Delphi® fuel injection. It includes a WEGO IIID dual channel wide-band oxygen sensor system for logging front and rear cylinder air/fuel ratio (AFR) data along with engine data. In addition to use with the Twin Tuner, the Twin Scan II Plus can also be used as a tuning aid for Screamin Eagle® Pro Super Tuner, Screamin Eagle® Race Tuner (SERT), and Dynojet® Power Commander® systems. Twin Scan software analyzes logged data and displays AFR and the required fuel correction (in percent) with the same RPM rows and throttle position sensor (TPS) or manifold pressure (MAP) columns used in Super Tuner, Power Commander®, and Twin Tuner tables. When used with the Twin Tuner, you can directly export calculated fuel correction data to Twin Tuner data files. The system can be used for tuning on a dyno or under actual riding conditions on a closed course or race track.  

Twin Scan II Plus Kit

Tuner Log Software

When the engine is running, you can display real time engine data on an instrument panel type screen by using the View Real Time Data command on the View menu.

You can also check proper operation of the throttle position sensor (TPS) when the run/stop switch is on (engine not running). Rotate the throttle through the full range of motion. The TPS% value should go from zero to 100%.  

Real time engine data is displayed on an instrument panel type layout with a round tach gauge and bar graph type gauges for all other parameters. Status messages are displayed in a separate window.

 

Real Time Engine Data Display

Tuner Log software is free! You can always download the latest version of the software and instruction sheet from our website. The software will run in demo mode without a Twin Tuner system attached. For your convenience, we include a copy on CDROM when you purchase the USB interface.

Download Tuner Log Software and Instructions

 

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