VRFI Fuel Injection Controller for 2002-2008 V-Rod^TM with Delphi^® System

 

· Simultaneously auto-tune fuel curves for front and rear cylinders under actual riding conditions with new WEGO IIID dual channel wide-band oxygen sensor interface

· Fully programmable plug-in replacement for 36 pin Delphi^® controller

· Robust alpha-N (throttle position and RPM based) fuel control eliminates problems with long duration/high overlap camshafts

· Powerful Windows software for custom programming and data analysis

· Full support for J1850 data bus used for communications with turn signal/security module (TSM/TSSM) and instrument cluster

· Data logging and diagnostics

· Billet aluminum housing with black anodized finish

· Easy plug-in installation

· All outputs protected against short circuits

· Supports all sensors including theft/security module

Not legal for sale or use on pollution controlled vehicles

Please visit our Tech FAQ and read the material about VRFI applications and tech support before purchasing the system!

The VRFI is the V-Rod^TM version of our proven TCFI fuel injection system for Twin Cam applications.

The VRFI kit now includes the new WEGO IIID dual channel wide-band exhaust gas oxygen interface that allows auto-tuning during actual riding conditions. The kit includes Bosch LSU 4.2 wide-band sensors for both front and rear cylinders. The user programs a table with the desired air/fuel ratios - the system then does the rest. No Dyno tuning required!

The VRFI solves tuning problems with highly modified engines. Competitive “band-aid” products that interface to the Delphi^® controller still rely on speed-density fuel control. Long duration/high overlap camshafts wreak havoc with manifold pressure - especially at idle and cruise RPM. Speed-density based fuel control simply can’t cope.

High-end automotive racing systems use alpha-N (throttle position and RPM based) fuel control. Alpha-N eliminates any dependence on manifold pressure and is unaffected by long duration/high overlap camshafts. The VRFI brings this proven technology to the H-D^® marketplace.  

Unlike competitive "band-aid" products that only control fuel delivery, the VRFI allows complete control over all engine functions, including ignition advance, idle RPM and cold start characteristics. This facilitates the use of throttle bodies modified for higher airflow.

All V-Rod^TM motorcycles use the SAE J1850 data bus for communications between the engine control module (VRFI), instrument cluster, turn signal/security module (TSM/TSSM), and diagnostic scan tools. The VRFI fully supports this new J1850 data bus including the use of the H-D^® scan tool to read sensor data and clear diagnostic codes. The VRFI also has built-in data logging that stores data for the last 15 minutes of operation. A USB interface and Windows compatible software allow the use of a laptop PC for programming and data analysis. The USB interface plugs into the existing H-D^® diagnostic connector on the motorcycle wiring harness. 

 VRFI Installation

Download VRFI Installation and Tuning Instructions 

The VRFI is intended for high performance race engines. We provide setup tables that will get you up and running. From a practical standpoint, tuning any fuel injection system requires an exhaust gas analyzer. You can either spend a lot of time on a dyno with an exhaust sniffer (like the newer Dynojet units) or you can use our WEGO. With the WEGO, the system will auto-tune the fuel tables while you ride the bike - you won't need to spend any time on a dyno. Auto-tuning under actual riding conditions only takes a few hours and gives much more realistic results that dyno tuning.

WEGO IIID Interface and Bosch LSU 4.2 Sensors 

Wide-Band Oxygen Sensor on Front Pipe

Wide-Band Oxygen Sensor on Rear Pipe

If you are purchasing your first VRFI kit, we highly recommend that you also obtain our VRFI View software. This allows you to use a Palm OS based handheld organizer (PDA) to view engine parameters including air/fuel ratio during tuning.   

 VRFI View Software Running on PDA

Smoken Joe Petersen of the Peformance Cycles Race Team (Wlimington, NC) is shown below at a recent AHDRA event at Rockingham. The programmable user function on the VRFID allows him to control a nitrous system. With street tires, stock wheelbase, and retaining the drive belt, he ran a 9.85 ET at 130.62 MPH! 

PC Link Software for Programming Custom Advance and Fuel Tables

PC Link software runs under Microsoft Windows 98/ME/XP/Vista. PC Link allows the user to program all the engine control tables and parameters within the Twin  Tec VRFI system. Minimum PC requirement is a 300 MHz Pentium with super VGA display (SVGA with 1024 x 768 pixel resolution). The VRFI connects to the PC by means of a USB interface. A USB cable is supplied with the unit. The PC must have a free USB port. If you have an older PC without USB capability, you will require special order PC link cable P/N TCFI-C. For more details, please refer to our PC Link Tech FAQ.

3D tables are used for ignition advance and fuel control. Additional 2D tables are used for functions such as cold start enrichment and idle air control. Some sample tables are shown below. 

Sample 3D Ignition Advance Table

Sample 3D Air/Fuel Ratio Table

Sample 2D Idle Speed Table

Sample Engine Control Parameters Screen

The VRFI also features a user output that can serve various functions. The user output can drive a relay and be configured as a general purpose RPM and throttle position based switch, to trigger an NOS system, or to control an electric shifter such as Pingel P/N 819. The screen below shows typical setup for fully automatic upshifting  with the Pingel electric shifter. For more details, refer to the VRFI Electric Shifter Tech Note.   

User Functions Screen

Pingel Electric Shifter Installation

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 VRFI system attached. For your convenience, we include a copy on CDROM when you purchase the VRFI system. 

Download PC Link VRFI D Version Software and Instructions 

VRFI Data Logging Software

The VRFI features comprehensive data logging capability. During dyno testing, you can display real time engine data on an instrument panel type screen. The VRFI also stores data for the last 15 minutes of operation. You can download and display this data on a chart recorder type screen. Data is available for all sensor inputs and output functions. The VRFI data logging capability greatly facilitates fine tuning and diagnosis of driveability issues. The data logging software, VRFI Log, has the same PC requirements as described above for  the PC Link software. For more detailed information, we suggest that you download the VRFI Log software and instructions. The software download includes a sample file with actual data.  

Real Time Engine Data Display