DYNATEK DFCH-4 User Manual Download Page 4

For Tech Support: 800.928.3962

Controls

The FI Controller is preprogrammed with 4 base fuel
curves. The curves are selected using the switch
labeled BASE. These curves adjust fuel delivery
based on throttle position and RPM, providing the
right amount of fuel under all conditions. The 4 fuel
curves correspond to varying levels of performance 
modifications. The levels of modification are broken
down into the following groups.

Base Curve 1

- Stock or basic modifications. This

includes slip on exhausts, intakes, air boxes, and air
filters.

Base Curve 2

- Bolt on modifications. This includes

full exhaust systems.

Base Curve 3

- Motor modifications.  This includes

cams, big bore kits.

The fourth curve has all of the fuel adjustment values
zeroed out. This curve is selected by moving the
rotary switch to any position other than Base 1, Base
2 or Base 3. This curve is useful for those wanting to
just modify the fuel delivery with the potentiometer 
adjustment, without having any other adjustments.

In addition to the 4 curves, there are 3 potentiometers
that allow you to fine tune the curve you select. These
potentiometers allow you to adjust the fuel curve from
+20% to -20% in 3 different RPM ranges. The RPM
ranges are:

LOW

Idle - 2000 RPM

MID

2000 - 4000 RPM

HIGH

4000 - 6000 RPM

To add fuel, turn the potentiometer clockwise. To
subtract fuel, turn the potentiometer counterclockwise.
With the potentiometer pointed straight up at the thick
tick mark (towards the Dynatek logo), that is 0%
adjustment. Fully counterclockwise is -20%, and fully
clockwise is +20%. Adjusting the potentiometer
between these points will result in adding or subtracting
an amount of fuel proportional to how far the knob
was moved from zero.

Calibration

To select the right curve, start by making sure that all
3 of the RPM pots are set to zero adjustment. Then
select the base curve which corresponds to the bikes
level of modification. This should make the bike run
better at all RPMs. The AF ratio if measured on a
dyno should be much smoother throughout the RPM
range than without the FI Controller. If it feels worse
or the AF ratio gets too lean at any RPM compared to
stock, try a different curve.

Once you have selected the correct curve, then you
can fine tune any problems with the map by using the
potentiometers. With the arrows on the pot straight up
and down, the pots are at 0% adjustment. To add
more fuel, turn the pots clockwise. To subtract fuel,
turn the pots counterclockwise. Do not attempt to
adjust while riding!

Troubleshooting

If the STATUS LED does not come on when the 
ignition is switched on, there is no power to the FI
Controller. Make sure that you have the ground
hooked up properly either directly to the battery
ground, or to a lug on the frame that is grounded.

If the LED comes on, but does not run on one or both
cylinders, double check all connections at the injector,
making sure the connectors are seated properly.

Summary of Contents for DFCH-4

Page 1: ...Velcro Strip Alcohol Swab 2001 2005 Harley Davidson Softail Part Number DFCH 4 2801189 REV 5 18 05 Congratulations on your purchase of this Dynatek product Please take a moment to read these instructions completely before installing the FI controller The installation will only take a few minutes but proper setup for your specific bike will take longer ...

Page 2: ... 2 pairs of injector connectors Plug the pair with the orange wires into the front cylinder injector harness and front cylinder injector Repeat this using the other connector pair and the rear cylinder injector Locate the TPS connector behind the throttle body STEP 1 STEP 3 STEP 2 Installation Part DFCH 4 2 Rear Cylinder Injector Front Cylinder Injector TPS Connector STEP 3 STEP 2 STEP 1 ...

Page 3: ...when you reinstall the tank Use one of the wire ties to tie the wires to the frame away from the cylinder head Place the FI Controller where you plan on mounting it permanently In most cases this will be under the seat Connect the ground lug black wire to a grounding point on the bike Use the Velcro tape to mount the FI Controller in position Use alcohol swab to clean mounting surface prior to att...

Page 4: ...ter counterclockwise With the potentiometer pointed straight up at the thick tick mark towards the Dynatek logo that is 0 adjustment Fully counterclockwise is 20 and fully clockwise is 20 Adjusting the potentiometer between these points will result in adding or subtracting an amount of fuel proportional to how far the knob was moved from zero Calibration To select the right curve start by making s...

Reviews: