For background i have a 97 gs, eagle rods/pisotons, ported head, crower cams,1200cc injectors, turbo kit(just installed), and just recieved my megasquirt from symtech. I would like to use none of the original ecu. I started the wiring, wired up air temp and coolant temp sensors, and the injector harness. The question i have is that some sensors such as the TPS, and crank position sensor have 3 wires coming from the stock sensor pigtail. Do i ground one, leave one, and run one to the megasquirt?? and if so, which ones? The o2 sensor has 4 wires running from it, what do i do here? Also a lil off subject but anyone got any form of estimate on power i could be expecting at 20psi? I will be running e85, i know its not possible to get close estimates but ive never built anything other than carbed v8's and i dont know what i could expect for power.