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Why Our System Is Different
Most air filters comprise of a case for the element and an adaptor to fit the air filter to the bikes fuel injection system. As in Figure A. In a lot of the case, the adaptor is virtually a hollow casting, Fig 1. This, in some cases partially covers the throttle chambers. Fig 2. This not only restricts air flow, but also increases the turbulence and thus further restricts the air flow into the throttle chambers. Fig 3.
The filter case is attached to the adaptor, and the air has to be sucked through a hole or holes in the filter case. The filter allows cold air in, but the air is slowed by restrictions. In the case where a scoop is attached to the filter, the air is rammed in at highway speeds. But the scoop does not help for around town cruising and low down torque.
Our system not only has direct, uninterrupted air flow. As in Figure B. But increases the length of the throttle chambers. Fig 4. This increases the air velocity of the air entering the throttle chambers. This means that the throttle chambers are feed at a higher rate then a standard air filter system, without any turbulence. The increase in air speed allows a slight pressure change across the throttle ports. All this results in a smoother throttle control. With more tractability at lower engine speeds.
Also shown is the engine crankcase gallery sited in the velocity plate. Fig 5. The baffle plate ensures that no crank case residue can come in direct contact with the filter medium.
Techlusion, How It Works
Dobeck Performance demonstrates what their competition doesn't want you to know.
You are looking at a second, and fourth gear roll-on of a stock Harley Davidson V-rod. Fully warmed up. Notice that not only is the horsepower different but that the air-fuel graph is also different. The competition would hope that you don't know this. Because they have RPM based technology. This means both runs are made with 100% throttle and both move through the same RPM range. Traditional map style adjustments can optimize either second or fourth, but not both.
You are forever trying to get the best of both worlds. But as you can see there is a different load placed on the engine in 2nd and 4th due to torque multiplication. The load sensing technology of the TFI adds the proper fuel to both second and fourth gear. Flattening out your fuel delivery curve.
Notice how flat the AIR-FUEL RATIO graph is above. The TFI is reading the different fuel demands that the bike needs in different gears. This is an electronic jetkit(r) as jetkits of the past they modified jet needles, needle jets, slide speed, etc. to flatten out the fuel delivery curve. When you change the main jet you change the fuel from 1st through 6th gear. When you raise the needle up you richen up the acceleration fuel through all engine loads. Dobeck Performance has achieved the ability to interface against the stock multidimensional maps to give you carburetor tuning logic.
For more information about the Techlusion TFI units, please visit the Techlusion website.
