iestyn.lewis

Thanks! Also just found this thread, which explains the distributor issue. I had no idea... http://www.classiczcars.com/forums/showthread.php?p=289835

Hi - I have (most of) the parts to go ahead with this on an 83 ZX. Your excellent writeup raised 2 points - - Are you sure the ECU has anything to do with ignition timing on a non-turbo 83 car? I know in a turbo car it does, but I thought the non-turbo was purely mechanical and vacuum controlled. I wasn't planning on having to get a new distributor/ignition module... - I think the ECU also controls power to the high pressure FI fuel pump - any suggestions on the best power source for the low-pressure electric pump? I have a spare P79 head on which I'm going to mount the SU intake, carbs and a stock 280zx exhaust manifold with EGR plugged. My plan is then just to unhook the harness and AFM, unbolt the FI exhaust manifold from the header tube, and pull the stock head, manifolds and all. Then swap in my new head with the carb setup. Pull the EFI harness, but leave the ECU in place. This way I can easily go back to FI just by swapping the other head back in. I hadn't thought about the fuel pump and ignition module needing ECU input though. Thanks for any help anyone can give.