As most of the people I've read in this forum always say, I'm new to Speeduino and standalone fuel injection, but not new to the engine and engine management side of things generally. That being said, this will be my first foray into the field of building a standalone engine system for this and I figured what better way than by doing it on a $200 car! I've got myself an old EA81 (1982 Soob GL) and got myself an SPFI unit off of a 'newer EA82 unit. Cool stuff, but before I get much further on this build and please accept my apologies if it's redundant at this point, but I've read through pages and pages of this forum, the wiki, and facebook pages and I'm not sure if I've got this all right.
I'm going to be purchasing a Micro ECU from https://www.everythingfuelinjection.com ... powerfull/ when they get back in stock (possibly NickZ here on the forums?) and had a couple questions regarding the installation and accepted inputs from the sensor I've currently got and how exactly they're supposed to wire up.
1) I've got a 4 wire TPS sensor that I believe I should be able to use 3 of the wires for my use but I could be wrong - can I omit the idle switch and use it as any other 3 wire TPS?: 2) My distributor is from the original SPFI system and has what looks like a 360 tooth encoder wheel read by an optical sensor of some sort. I've replaced the 360 tooth encoder wheel with a 24-1-1 optical wheel for a VG30E. A little modification and it seems to fit just right but I'm not sure where to go from there. Will this set up work okay without a physical crank trigger? And does a crank trigger even matter with an SPFI system?:
https://www.diyautotune.com/product/54- ... DaVeTOMLx4 3) Third concern is the coil. I also got it from the original SPFI system and it appears to be a dumb coil with some sort of ignitor attached on a bracket next to it. Will this work with the speeduino? If so, how would I go about wiring it up? 4) Last major concern is the fuel injector itself. It's a throttle body injector of low impedance (2ohm) and high flow. I'm not sure what I could replace this injector with because it's so oddly specific, so my alternative was to buy a big resistor block and put it on the + of the injector, but I do not hold the hold open amperage so the resistor block will essentially be a "best guess" based on some arbitrary numbers I put in the injector resistance calculator... Do I literally wire this resistor physically 'in line' with the + connector and just have a giant ceramic block in my harness somewhere or am I an idiot?:
1F@20PSI = 133ml
800cc or 76pph
Really sorry for my noob questions but I've reached a couple places where none of the information I've found applies to me very well or it's way above my head... Thank you for all your guy's help ahead of time and I know there's more I'd like to ask but for now these are my biggest hurdles to cross.