Daytona Twin Tech TCFI Gen 4 EFI Controller for Harley FXST
The Daytona Twin Tec TCFI Gen 4 Auto Tune fuel injection controller is a plug-in replacement for the 36-pin Delphi controller with J1850 data bus, designed to optimize fuel management for Harley FXST. It features a durable billet aluminum housing with a black finish and a dual-channel wide band exhaust gas oxygen sensor interface for precise air-fuel monitoring. Two Bosch LSU 4.2 wide band sensors are included, enabling accurate real-time diagnostics and tuning for both front and rear cylinders. The kit supplies two 18 x 1.5mm weld nuts for straightforward exhaust pipe installation, plus a USB interface cable and an EFI intake manifold flange set in chrome for added installation flexibility. Key capabilities include quick auto-tune calibration on a dynamometer or during on-road testing, and an alpha-N fuel control system engineered to maintain smooth operation with long-duration and high-overlap camshafts. Windows software provides comprehensive options for custom programming and detailed data analysis, helping you dial in fuel curves with precision. Full support for the J1850 data bus ensures communication with vehicle modules such as turn signals, security systems, and instrument clusters for integrated functionality. Compatibility and fitment focus Harley Davidson FXST models from 2001 through 2010. Please note, this product is not legal for sale or use in California or on pollution-controlled vehicles.Daytona Twin Tec TCFI Gen 4 Auto Tune fuel injection controller is fully programmable plug in replacement for the 36 pin Delphi controller with J1850 data bus.
Enhance your Harley Davidson FXST with the Daytona Twin Tech TCFI Gen 4 EFI Controller, designed to optimize fuel management and improve engine performance. Featuring a durable billet aluminum housing with a sleek black finish, this advanced fuel injection controller includes a dual-channel wide band exhaust gas oxygen sensor interface, providing precise air-fuel ratio monitoring for both front and rear cylinders. The package also includes two Bosch LSU 4.2 wide band exhaust gas oxygen sensors, suitable for accurate real-time diagnostics and tuning. The kit is supplied with two 18 x 1.5mm weld nuts, making installation on exhaust pipes straightforward and secure. With its quick auto-tune capability, this controller allows for effortless calibration of fuel curves either on a dynamometer or during on-road testing, saving time and ensuring optimal engine performance. The robust alpha-N fuel control system is engineered to eliminate common issues associated with long duration and high overlap camshafts, providing consistent fuel delivery and smoother operation. The included Windows software offers comprehensive options for custom programming and detailed data analysis, empowering users to fine-tune their setups with ease. Full support for the J1850 data bus enables seamless communication with vehicle modules such as turn signals, security systems, and instrument clusters, ensuring compatibility and integrated functionality. Designed specifically for Harley Davidson FXST models from 2001 through 2010, this EFI controller is an essential upgrade for enthusiasts seeking reliable, high-performance fuel management. Please note, this product is not legal for sale or use in California or on pollution-controlled vehicles. Accessory items include a USB interface cable and an EFI intake manifold flange set in chrome, providing additional flexibility for installation and customization.
Features:
- Includes TCFI Gen 4 plug-in fuel injection controller with billet aluminum housing and black finish
- Dual channel wide band exhaust gas oxygen sensor interface for precise monitoring
- Two Bosch LSU 4.2 wide band exhaust gas oxygen sensors included
- Two 18 x 1.5mm weld nuts for exhaust pipe installation
- Quick auto-tune feature for efficient fuel curve calibration on dyno or on-road
- Alpha-N fuel control system eliminates issues with long duration/high overlap camshafts
- Windows software for custom programming and data analysis
- Full support for J1850 data bus for communication with vehicle modules
Fitment:
Harley Davidson FLST 2001
Harley Davidson FLST 2002
Harley Davidson FLST 2003
Harley Davidson FLST 2004
Harley Davidson FLST 2005
Harley Davidson FLST 2006
Harley Davidson FLST 2007
Harley Davidson FLST 2008
Harley Davidson FLST 2009
Harley Davidson FLST 2010
Harley Davidson FLST 2011
Harley Davidson FLT 2001
Harley Davidson FLT 2002
Harley Davidson FLT 2003
Harley Davidson FLT 2004
Harley Davidson FLT 2005
Harley Davidson FLT 2006
Harley Davidson FLT 2007
Harley Davidson FLT 2008
Harley Davidson FLT 2009
Harley Davidson FLT 2010
Harley Davidson FLT 2011
Harley Davidson FXD 2001
Harley Davidson FXD 2002
Harley Davidson FXD 2003
Harley Davidson FXD 2004
Harley Davidson FXD 2005
Harley Davidson FXD 2006
Harley Davidson FXD 2007
Harley Davidson FXD 2008
Harley Davidson FXD 2009
Harley Davidson FXD 2010
Harley Davidson FXD 2011
Harley Davidson FXST 2001
Harley Davidson FXST 2002
Harley Davidson FXST 2003
Harley Davidson FXST 2004
Harley Davidson FXST 2005
Harley Davidson FXST 2006
Harley Davidson FXST 2007
Harley Davidson FXST 2008
Harley Davidson FXST 2009
Harley Davidson FXST 2010
Harley Davidson FXST 2011
