ECU comparison 1983 280zx turbo vs. 1986 300zx turbo AAC output

I have done some research in the FSM and I am pretty sure the only thing the AAC does for idle control on both of these has to do with load demand from the AC/and battery. That being said I do NOT have the AC switch active. I don't think it really targets a specific RPM, more like you set that manually and the AAC will "up" it based on load detected by switches and or battery voltage. I did not try it but i suspect if i had left the alternator disconnected and allowed the battery voltage to drop to below 11v it may have altered the duty cycle shown on the O scope. I am pretty much done with it, will just not use it when I finally get around to actually installing the engine.

[@jeremyavery703]

I had done the 300zx whole system swap on my 280zx the only thing that I gained in my opinion was a better way of reading the incoming air with the mass . I had a modified 300zx distributor. And a supercharger on the 280zx motor. It worked great.

[@davewm9589]

did you use a Knock sensor?

[@sammyd7857]

If you are going to muck around that much better to just install a crank and cam sensor with an aftermarket ecu

[@davewm9589]

@@sammyd7857 Perhaps, but I enjoy the muck around part.

[@cammos]

​@@sammyd7857very true yeah set a ecu up u can have all the data u need on ur laptop and not have to set up like a mad scientist with 50yr old tech

[@davewm9589]

I have been thinking about it and have concluded the switch rate is just too fast for a vacuum operated IAC (idle air control). I am pretty sure its not needed as there is an adjustment screw on the vacuum module on the intake manifold. BUT I may try a IAC from a later model car, I note some volvos have a idle air bypass that is two wire (power on spring close for off) that may work. Its a direct control that is the solenoid is directly controlling the air valve (unlike this which is a vacuum control). So another trip to the JY is coming. If I found out anything I will make another video.

[@W.Khairi]

Though i dont unsterstand what the setup is all about, But i Still find it to be very interesting.