Quote: Originally Posted by Sota227990
RFI, resistance losses, wire capacitance, signal waveform distortion, all those goodies. Keep in mind I'm planning on adding that TCS box as well, so the wiring chain gets even longer. Maybe I'm just paranoid as I think I've tracked my stumble down to the MSD tach adapter I installed last year; stumble coincides with the shift light not working.
Also, no USB port in place of the serial?
The WOT Box uses an extremely low resistance solid-state switch and 16-awg wire to minimize the resistive losses. The wiring should not add any significant capacitance or inductance that would cause any real distortion in the driving signals. The RFI added is not significant since we are on the non-switched side. There is only the chance for RFI when we interrupt the ignition for the WOT shift, however we have taken steps to minimize the amount of energy that is radiated.
If you think about it, an after-market tachometer has a much higher likelihood of causing interference than the WOT Box. The tachometer will tap into the switched side of the ignition coil, so the wire that runs from the ignition to the tach will act like an antenna, radiating the ignition pulses all over the car. Since the WOT Box is on the non-switched side, the voltages in our wires remain constant, thereby causing no RFI.
Our test units have been on daily-driven cars for several months now and no problems have been observed. We'll keep a close watch on this issue.
The combination of the WOT Box and the TCS should not add any more resistance to the ignition circuit path, since the TCS should be actively regenerating the ignition drive signals.
