Wiring advise
Thread Starter
Staging Lane
Joined: Jan 2011
Posts: 50
Likes: 0
From: Hopkinsville, Kentucky
Wiring advise I have a 99 5.7 out of a 99corvette/ 6speed. I don’t have an ecm or a harness and want to install into a 67 Chevelle. Should I source a factory ecm and harness, aftermarket ecm and harness setup or some combination of the two? Probably should ask more questions that I haven’t even considered yet. I don’t have the transmission and I might go automatic in the Chevelle. Suggestions and thoughts and best options for cost benefit choices.
Got to know your combo first; manual or auto. I like to use OEM stuff and an aftermarket harness. I've used PSI conversions several times with great support. Research is your friend here. Educate yourself as much as you can.
Anyone heard of "Turbo Nasty"?
Anyone heard of "Turbo Nasty"?
TECH Fanatic
Joined: Dec 2017
Posts: 1,476
Likes: 271
From: Bossier City, Louisiana
I've used PSI Conversions standalone engine harnesses twice on factory GM red / blue PCM devices with no complaints. PSI will need to know what transmission you plan on using. Will this be drive-by-cable or drive by wire? Things change a little if you wind up with a Flex Fuel engine setup. Red and blue PCM or Blue / Green? The PSI purchase process addresses most of these questions.
Rick
Rick
Decide who's tuning the car before you decide on which harness to use
If you have nothing at the start, then most quality routes will be about the same cost:
Stand alone harness, junkyard ECM, startup and final tuning for GM ECMs
Terminator X/Xmax, final tuning
If you have nothing at the start, then most quality routes will be about the same cost:
Stand alone harness, junkyard ECM, startup and final tuning for GM ECMs
Terminator X/Xmax, final tuning
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Go with a Holley Terminator, you’ll be able to get it running and driving yourself and can work out all the issues before bringing it to the tuner for a final tune. So you save on having it towed to the tuner and depending on your setup and how basic it is, you might not even need a final tune so you would save $$ on that as well.
