With the inherent lean condition of bikes rolling out of the factory, combined with the propensity for us bikers to immediately add an aftermarket exhaust or air cleaner — most likely both — it becomes imperative to pick the correct fuel-injection controller for your particular bike set up. This in itself can be challenging, but the genius lurking down in Florida known as Daytona Twin Tec provides two solutions sure to fit into your tuning needs, no matter what end of the performance spectrum you come from.
The first is very possibly the best feature-for-dollar-value Twin Tuner 2 fuel-injection controller on the market today. The offers myriad functions — all for $250 to $297 — depending on the model of your bike. The Twin Tuner 2 allows you to easily adjust your fuel injection and ignition to match the requirements of performance parts, including high-compression pistons/heads, camshafts, free-flowing exhausts and low-restriction air filters. You can add or subtract fuel (up to +30 percent or down to -20 percent) and retard spark timing up to 10 degrees. Adjustability is a breeze — you just use the up/down pushbuttons and a bright daylight-readable LED display to select and change the fuel trim and spark retard in the rpm and throttle position ranges required by most applications.
The Twin Tuner 2 also has an advanced mode, where you can use the optional USB Interface and PC Link Tuner software to make precise fuel- and spark-retard adjustments. The PC Link Tuner software uses the same rpm rows and throttle-position columns as the Dynojet Power Commander. If you have created Dynojet Power Commander maps, you can use the same values in your tables. You can also make independent adjustments to the front and rear cylinders. When the engine is running, you can display real-time engine data on your computer via the USB interface by using the View Real-Time Data command on the view menu and check proper operation of the throttle position sensor (TPS) when the run/stop switch is on (engine not running). Real-time engine data is displayed with a round tach gauge and bar graph gauges. And installation is a snap with no splicing, cutting or crimping required.
And if you’re looking for a no-holds-barred baddest of the bad FI tuner, the TCFI 3 is the Big Daddy of them all. It is, in fact, a complete replacement for your bike’s ECU that includes a dual-channel wide-band gas oxygen interface with 2 Bosch LSU 4.2 wide-band sensors enabling your bike to run wide-band/closed loop. In layman’s terms, that means you’ll always have the perfect tune. It’s like having your own personal tuner and dyno constantly making changes every few seconds, ensuring that your bike has the perfect tune-up at all times, no matter what the conditions.
- Simultaneous 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 used on 2001-2010 models.
- 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 on 2004-2010 models.
- Support for new 6th gear indicator on 2007-2010 models.
- Enhanced data logging and diagnostics.
- Programmable user input and output (TCFI III only — not available in TCFI EX version).
- Billet-aluminum housing with black anodized finish.
- Easy plug-in installation.
- All outputs protected against short circuits.
- Supports all sensors, including theft/security module.
The TCFI 3 makes it possible to have the most comprehensive and complete tune in your bike with the unit doing the heavy lifting. Once the initial parameters are set, the TCFI is constantly working to ensure the perfect tune. And last, but certainly not least, is a feature that you won’t find on many other units out there — data logging!
The TCFI features comprehensive data-logging capability. You can display real-time engine data on your computer screen. The new TCFI Gen3 stores data for the last 60 minutes of operation at 10 samples/second, allowing you to download and display this data. Data is available for all sensor inputs and output functions. The TCFI data-logging capability greatly facilitates fine-tuning and diagnosis of drivability issues. The data-logging software also allows you to download operating statistics and historical diagnostic codes. It also displays the maximum engine rpm, time at the rpm limit (in seconds for better resolution) and the number of engine starts. All this data can be printed to provide a permanent record. The data stored in the module for maximum engine rpm and time at the rpm limit can be cleared. All other elapsed time and engine starts data is permanent.
And the next part is my favorite — any historical diagnostic codes logged by the TCFI are listed along with the number of trips (engine start cycles) since the individual code was last logged. And the software can also clear diagnostic codes! Why, it’ll even do the dishes and fold the laundry! Sorry I got a little carried away there. But short of retrofitting something from the Space Shuttle to your bike, this is quite possibly the most complete system on the market. And don’t let the functionality scare you. The physical install is easier than an oil change and all that’s left is to simply set the parameters and get out of the way so the TCFI can do the real work.
So don’t let the hundreds of dollars you’ve spent on your performance mods go to waste because your bike isn’t properly tuned. Finish the job with one of the most comprehensive FI controllers on the market, no matter your budget.