AEM Wideband O2 Gauge Wiring to SCT X4

Making a quick video to help a subscriber wire their AEM Wide Band O2 gauge to the SCT X4 device with the SCT #9608 Cable in order to properly data-log using the SCT Live Link software

[@Lykos636]

Also thank you for making this video!!!

[@GrandPitoVic]

Very interesting. I had bought a SXT4 a few years ago when they came out. I used it once. I need to pull it out of my closet and update it for sure.

[@Ricochet1012]

Thank you. Just in time for me to install my gage! This is so confusing to find online.

[@bpbuilds]

Let me know if it works

[@ConnorHuet]

Never thought to ask this before but when you drive, does the supercharger whine at lot?

[@bpbuilds]

There’s multiple shots of the car running with the supercharger in various videos on the channel. Yes the silencing ports are tig welded closed. And it whines pretty good.

[@ConnorHuet]

Nice, also what alloy of aluminum did you go for, I just got the edelbrock intake and don’t know much about metals for the adapter plate.

[@bpbuilds]

@@ConnorHuet the adapter plates are 6061. But I wouldn’t be too concerned with that. Do you have AC TIG welding ability?

[@ConnorHuet]

Thanks for the info! I do not have a tig welder but I could get access to one if absolutely needed. My plan is to cnc it and not have to do any welding, there is a drift guy that did exactly what I want to do on a 2jz with an m90. Thanks for answering my questions greatly appreciate it. One more: can you run your boost gauge off of the idle vacuum valve, always wondered how that gets boost since I thought boost was made after that valve. Thanks and great video!

[@bpbuilds]

@@ConnorHuet the boost gauge is ran to a fitting between the supercharger outlet and cylinder heads. So somewhere in the lower intake manifold. I installed one using an 1/8” NPT barb fitting. The fuel pressure sensor must also T into this line so it sees boost as well

[@Lykos636]

Ahh so the blue is the Serial TX and white is the analog positive? Sorry for the questions 😅

[@bpbuilds]

The White from the AEM gauge is the linear 0-5VDC signal that the Fire wire cable is looking for. You said it’s hooked to red. That’s fine. You’d just use FireWire red. Not orange like I did. But I don’t think you’re hooked to ground properly. I don’t use any brown wire It’s a DC voltage being read. DC has 2 wires. That’s all that’s needed to read DC voltage. Blue is the RS 232 logic. From what I see on the AEM manual at a baud rate of 9600. Which is a common rate for a microcontroller. And serial communication. Brown is a negative signal. 0 to -5. I would hook your SCT cable black. To AEM blue. And re-test.

[@Lykos636]

@bpbuilds odd. What model AEM series do you have? I have the X series 30 and I tried the blue for a common and it shot up to 28 and as soon as I used the brown it shot back down to 12-14 like it's supposed to

[@bpbuilds]

@@Lykos636 from your previous post. You have more wires hooked up than I do. Disconnect everything except: 1. Red SCT wire that is connected to the white AEM. 2. Black SCT wire to Blue AEM. Try that

[@Lykos636]

@bpbuilds didn't work the readings are still high

[@bpbuilds]

@@Lykos636 you have to give me more information than that. At idle. Your AEM gauge reads what? At idle. Your fire wire red reads what?