Still thinking of dumb stuff I could try. I have the exhaust valve servo from the CBR1000RR. It's not actually a servo, it's a gearbox with a built in pot (variable resistor), the ECU is the controller in it's original application. So it needs a "controller". But I tossed on a "hobby grade" servo board from an old servo and Voilà, it kind of works.
I was thinking about trying to set-up a throttle by wire with it. I know, sounds crazy right?
I'd probably use an arduino to control it. Then I'd have full control over it's parameters, end points, PID values, etc. Here it's working on 6 volts with a servo tester (and cobbled up) servo controller board.
https://www.youtube.com/watch?v=tgqGXH1g-O0As a.moore mentioned I'd need another actuator for a fail safe. But I could also read the stock TPS sensor (another pot) as a double check.
It looks like the 2017 and up have a servo built in to the throttle body. It looks like just one motor, hard to say, but I wonder what it's "mechanical" fail safe is. There's one on ebay for $130, it'd almost be worth buying just to see how it works.
I was thinking maybe some sort of one way linkage hooked up to the parking/emergency brake for a mechanical fail safe. I guess that would make starting on a hill harder, ha.
Just toying with the idea, don't call the paramedics just yet. Car still probably won't be on the road even this year so lot's of time to change my mind.