Stjohn's RV-7

After I cleaned up the shop, I had a look at the engine. The airplane that engine spent its previous life in, the Cessna 172 Cutlass RG, is a 28v airplane. So I have a useless 28v alternator and a useless 28v starter. Maybe not useless, but certainly of no use to me; I’m going to run a 14v system. Maybe. What I don’t get is what’s going to be 12v and what’s going to be 14v and whether or not it matters. So another thing to puzzle out. The good news is, i’ll be able to keep my firewall penetrations to a minimum, because the MGL RDAC (the box all the sensor probes connect to) is mounted on the engine side, with one comm wire going back through the firewall to the EFIS. I’ll need to poke holes for the panel bus power and the control cables, but that should be it. I hope.