To support paddle shifting I considered a standalone Gear Control Unit (GCU), but decided to upgrade my MoTeC ECU from a M130 to a M150 with GPRP because a single device simplifies wiring and provides tighter integration of fuel, ignition, throttle, and the shift actuator. An example configuration is shown below.
I considered MoTeC’s Paddle Shift Auxiliary Kit, but the solution from Shiftec is better. Their Air Power Source (APS) combines the relay, pump, pump-to-accumulator hose, accumulator and pressure sensor into a single motorsport-quality device. This increases reliability while reducing weight and complexity. There are only two connections; a -4 JIC for air and a motorsport connector for power and CAN communication. The pneumatic shift actuator is compact and seems well made.
Pneumatic Shift Servo and Air Power Source (APS)
The paddle shifters provide a fantastic tactile experience. I have always loved pushing buttons and flipping switches and these are the coolest switches I have ever used. I was playing with it in the garage and I was having so much fun I brought it upstairs. It didn’t take long for me to annoy everyone with constant clicking so I put it down. My son tired it and he was instantly addicted. My wife asked “What’s wrong with you two?” The best I could explain it was that it is was similar to the ridiculous way she acts around a cute baby — it’s just wired into our DNA.
The shifter’s body is anodized CNC aluminum, no surprises there. The lever actuates a micro switch which is rated for two million cycles. I’m not sure how many cycles my son and I have used so far, but if I don’t speed up the build I might have to replace the micro switch LOL.
There are no springs… so what type of sorcery is in the shifter?
The magic is simple, two high-strength magnets (I assume neodymium). Magnetic force is the inverse square with distance so it’s takes some force to break the magnets apart at which point the resistance disappears. When you release the tension in your fingers the billet lever exponentially accelerates and smashes into the billet body. This type of auditory and tactical experience wouldn’t be possible with a spring. I’ve driven a number of paddle shifted cars before (e.g., BMW, Porsche, Lamborghini, Ferrari, etc.) and their paddle shifters all feel like a game console in comparison. It’s a small thing, but it gives me a smile every time I use it.