The current dumps down the ground away from the Zener,
Rev counter still sees the voltage spike tho. Just much more clearly and also helps when hitting the standalone's rev limiter where it cuts the spark output.
Prolongs diode life aswell, it's all win win by adding the resistor
a little progress, had issues with my flashing tool, it had an update and a fellow tuner warned me that it killed an ecu on a 197 he was custom mapping. tool has been updated now tho.
ive got a few off the shelf maps in my hands aswell so need to convince the brother to give me his car for a week but he wants to use my R5 as a courtesy car
I think this may help me as I was suffering the same issues on my wasted spark setup. The Tacho started to jump around when it got up to the 5000-5500 mark.