RX-8 conversion mostly running; I'm still working on the brakes.
I'm using a Netgain Hyper9 in place of the original engine; I kept the original 6-speed manual transmission. About 24kwh of LFP cells; about half go in the engine compartment, and the other half go in the back under the seats where the gas tank used to be.
I got an Audi A6 vacuum pump and Festo VPENV-PS/O-S-L-GH vacuum switch to turn it on and off. I realized the Festo switch can't drive any significant amount of current, so I got a solid state relay. Once I wired it up and adjusted it, it kept turning on and off. I realized that as soon as the pump switches off, it lets all the air out. So, I guess I need a check valve and a separate reservoir. The pump itself seems to have its own small reservoir, so I thought maybe that's all that's needed, but no. I ordered something that looks like it ought to work...