Five rotary switches are used to set the operating modes, adjust the initial timing and timing advance, and select the RPM limit. Since the new Twin Cam 88® engine uses a non-adjustable crankshaft position sensor, mechanical timing adjustments are no longer possible. The TC88 solves this problem with a switch for setting the initial timing. A second switch sets the slope of the advance curve. The combination of these two switches allows the user to optimize the timing advance for a wide range of applications - from stock to highly modified engines. For details, including advance curves, you can download the installation instructions from our website.
H-D® motorcycles with the Twin Cam 88® engine have a check engine warning LED on the instrument cluster. The TC88 communicates basic diagnostic information by blinking codes on the check engine LED. This eliminates the need for an expensive scan tool. Typical diagnostic codes include failed sensors or low/high battery voltage.
The TC88T is a special race version with a stage RPM limiter suitable for drag racing. The input at pin 10 of the black connector normally connected to the bank angle sensor or TSM/TSSM module is used instead to select between the stage and maximum RPM limit. The stage RPM limit is set by means of the two rotary switches on the module. The maximum RPM limit is programmed by means of the optional USB interface and PC Link software. When the input on pin 10 is grounded by means of a switch, the stage RPM limit is selected, otherwise the maximum RPM limit is selected. For more details please read the TC88 Stage Limit Tech Note. Quick Start GuideFull Instructions Tech FAQUSB DriverPCLink Software
