Misc odds and ends

Spent some time figuring what I will be mounting in the enclosure in the engine bay. I played with the vacuum pumps I had bought, I think I will run both pumps for redundancy one on 12 volt and one at 144 volts. The 2 pumps generate vacuum much faster than the one I had planned on running. I also played around with the optical pickup for the tachometer circuit that is part of the overspeed shutdown, I had to add a pullup resistor to the sensor for the tachometer to work properly. I made a pulse wheel from a scrap grinding wheel that I had on hand. I will mount this on the front of the motor with a 1/4 bolt.
I now have all the systems tested and checked, just need to mount the parts at this point, I had to order some new timers from Ebay for the start sequence and overspeed circuits, I had some others that were 24 volts and wouldn't work at 12 volts. I plan to have a delay after the key is on to allow the vacuum pumps to run and also precharge the controller, I think 10 seconds would be enough.