Customer support is our #1 priority. |
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We offer a couple different resources to answer your questions or help troubleshoot your problem.
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| FREQUENTLY ASKED QUESTIONS: |
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Why do I need an EFI Controller?
What's the difference between the TFI and the Power Commander?
How do I adjust my TFI controller?
What's the recommended settings for my vehicle?
There are two listed part numbers. Which one do I want?
I hear your product only adds fuel. Is this true?
Fuel Injection seems complicated. How is the TFI stated to be easy to adjust?
What if I tune my vehicle and then ride up into the mountains. Will I have to re-adjust?
What if I add or change my performance modifications? What do I have to do to my TFI?
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| Why do I need an EFI controller? |
Any power sports vehicle comes equipped with an ECU map developed by the OEM manufacturer to pass federal regulations. The stock ECU map does allow for small fuel changes to compensate for temperature changes, altitude changes,...etc, but does not allow the end user to make adjustments for additional modifications which affect the air flow like after market exhaust systems and air filters. EFI controllers are just like buying a jet kit for a carburetor vehicle. Even a stock vehicle can benefit from an EFI controller, but if you plan to do any other performance modifications to your vehicle then you should start with an EFI controller which allows you to tune the fuel.
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| What's the difference between the TFI and the Power Commander? |
1. Price - The TFI offers the same amount or even more performance gains at a better price point.
2. Simple adjustments - Make fine-tune adjustments with your TFI using a screwdriver. NO computers are required. NO dynamometer tuning is required. NO downloading different maps for changes in vehicle modifications. This simplicity allows you to optimize your fuel solution to maximize drive ability and performance.
3. Load Based Technology - The TFI offers a better fuel solution for every driving condition and within every gear by basing fuel addition on engine load. The Power Commander uses throttle position and RPM technology which optimizes performance for only 4th gear.
Learn even more here
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| How do I adjust my TFI controller? |
Adjusting the TFI is done with a screwdriver. The TFI has four adjusting pots. The Green or Cruise Fuel Pot which functions like a fuel mixture screw on a carburetor. The Yellow or Accleration Fuel Pot which functions like an accelerator pump or needle on a carburetor. The Red or Full Throttle Fuel Pot which functions like a main jet on a carburetor. And a RPM Switch Pot which depending on the application determines when the Green Fuel Zone shuts off or when the Red Fuel Zone turns on.
Additional adjusting info here
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| What's the recommended settings for my vehicle? |
The recommended settings for your vehicle will be listed in the instructions. All instructions are posted online. Click here to view them. The listed settings are only a place to start. Based on the number of after-market modifications you have made on your vehicle and different combinations, they may change slightly. Settings are also very dependent on the individual rider. Your riding style and mileage preferences will affect the settings which work best for you.
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| You list two part numbers for my vehicle. What's the difference and which one do I want? |
For a few motorcycle applications the difference is how you install the TFI. For instance a FI-1025 is a tap-on unit. To install this TFI you will have to splice into the correct wires. A FI-1040ST is a complete plug-n-play controller where it plugs into the factory injector connectors for installation. The other reason for two part numbers for the same vehicle could be for different fueling needs. For example a FI-1040ST can be used for a number of Harley Davidson motorcycles for modifications like an air cleaner or exhaust pipes. A FI-1040HPST is needed for larger builds which require even more fuel. The HPST models are usually suggested for 110 cu in builds.
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| I hear your product only adds fuel. Is this true? |
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Yes. The TFI product line only adds fuel. We designed it that way to keep it simple and affordable. Our belief is that 80% of the time when you modify your vehicle you have to add fuel to obtain peak performance. Fuel systems are mapped by the factory to be lean in everyday driving conditions in order to meet emission standards. Then if you modify your vehicle with say an aftermarket exhaust system, which tends to reduce back pressure, you lean out the fuel mixture even more. In certain instances you do have to pull fuel and for those you will have to use our GEN 3.5 or higher technology which has this ability. However, the TFI performs well with the majority aftermarket exhaust systems which require fuel to be added.
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| Fuel Injection seems complicated. How is the TFI stated to be easy to adjust? |
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You're right in believing that fuel injection is complicated. There are thousands of hours of design time in creating a solid and effective fuel injection map at the factory. The research and development of a solid fuel system also involves the design of a lot of reliable and proven sensors, components and other hardware. We believe that the factory fuel injection map is rock solid, and that the factory technicians and engineers possess a lot more knowledge and experience in designing their own systems than we do. However, the designers are still just creating an EFI system for a stock machine and to meet emission standards. You start modifying your vehicle and you will need a fuel solution to compensate for the changes. That's what we offer. An electronic controller to adjust your own fuel mixture which can be done without a computer.
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| What if I tune my vehicle and then ride up into the mountains. Will I have to re-adjust? |
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Probably not. The TFI is a "piggy-back" unit. It attaches directly to the signal between the ECU and the injectors and only modifies the length or duration of the pulse width. All of the factory-specified and required settings for temperature, altitude, and barometric pressure adjustments are still made by the ECU. We just add on to the adjusted signal.
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| What if I add or change my performance modifications? What do I have to do to my TFI? |
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The TFI is a full-range product that can handle a number of different performance modifications. The on-board pot adjustments allow you to make the necessary changes. Most of the time you will just have to adjust the pot settings to reflect the new modifications. NO downloads. NO computers. It's that easy.
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