Reading about stand-alone systems in this thread only, and not very far in... having read all the stickies, a few threads by name, and the top recent posts just to see what people are doing, and I have read comments at least twice, if not three times, about "redoing" the engine harness. I am not going with a "name brand" unit, am building a Speeduino, based on Arduino micro-controller boards, and code from a private developer. Using TunerStudio, and Megalog Viewer, I become the tuner, so as for "speaking to the guy doing the tuning" for advice, in this case, I only get the answers I want to hear. (This is the way I am going though).
I keep thinking I will only be adding wires to the existing harness, and fixing some of the crappy connections in my 30 year old harness. I have sourced 10 colors of appropriate gauge, silicone covered, stranded wire, and I plan to use the wire lacing technique that others here have talked about. I've seen it in black and in white, think I will go with the black, to keep it clean. So no covers, no tape, no tie-wraps or wire-wraps... lace.
Trying to decide where I'm going to build-in the resistor packs for my low-resistance 550s, Almost feels like those should be under the injector clip, not some big-ass module off on the shock tower. I'm still checking that out, as I only have my RC injectors to measure today, the originals must be here around. There are only five or six exceptions to everything for this car being in this room with me... and it has been maintained that way for years. It's all here, so I will eventually check to see if the original injectors were low or high impedance, and if low, that means I should have the resistor pack(s?) here, too.
I have intentionally tried not to "eliminate" anything from the car/system/build, just for the sake of making it cleaner. Obviously, a whole new harness from the stand-alone on into the engine bay would be cleaner. I'm not against chucking features, if the features aren't needed... not trying either to necessarily make it street legal, and I suspect it will always be an issue getting things past California SMOG testing. Some "features" get scrapped 'cuz they're not available. Speeduino does not support "full sequential" injection, and that seems to be something people want. I haven't figured out exactly what it is though... and only thrown it out because it's not available with Speeduino. I see the add-on board that MS sells to implement that, and launch control, so maybe it's possible with Speeduino with hardware and code. (it's not the result, it's the journey
)
The Question, you ask?
With a stand-alone, what wires REALLY pass through the firewall and to where? (okay, not specifically, but, what or how much from the original, remains?)
When you install, say, an MS3 Pro in your Mk3 Supra, do you use anything from the original engine bay harness?
I keep thinking I will only be adding wires to the existing harness, and fixing some of the crappy connections in my 30 year old harness. I have sourced 10 colors of appropriate gauge, silicone covered, stranded wire, and I plan to use the wire lacing technique that others here have talked about. I've seen it in black and in white, think I will go with the black, to keep it clean. So no covers, no tape, no tie-wraps or wire-wraps... lace.
Trying to decide where I'm going to build-in the resistor packs for my low-resistance 550s, Almost feels like those should be under the injector clip, not some big-ass module off on the shock tower. I'm still checking that out, as I only have my RC injectors to measure today, the originals must be here around. There are only five or six exceptions to everything for this car being in this room with me... and it has been maintained that way for years. It's all here, so I will eventually check to see if the original injectors were low or high impedance, and if low, that means I should have the resistor pack(s?) here, too.
I have intentionally tried not to "eliminate" anything from the car/system/build, just for the sake of making it cleaner. Obviously, a whole new harness from the stand-alone on into the engine bay would be cleaner. I'm not against chucking features, if the features aren't needed... not trying either to necessarily make it street legal, and I suspect it will always be an issue getting things past California SMOG testing. Some "features" get scrapped 'cuz they're not available. Speeduino does not support "full sequential" injection, and that seems to be something people want. I haven't figured out exactly what it is though... and only thrown it out because it's not available with Speeduino. I see the add-on board that MS sells to implement that, and launch control, so maybe it's possible with Speeduino with hardware and code. (it's not the result, it's the journey
)The Question, you ask?
With a stand-alone, what wires REALLY pass through the firewall and to where? (okay, not specifically, but, what or how much from the original, remains?)
When you install, say, an MS3 Pro in your Mk3 Supra, do you use anything from the original engine bay harness?
