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First top mount single turbo 370Z

Originally Posted by A4RingedONE8T I haven't taken a meter to it because both MAF signal and IAT signal are 0-5v, no way of distinguishing between the two. The car is

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Old 07-21-2011, 12:27 PM   #616 (permalink)
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Originally Posted by A4RingedONE8T View Post
I haven't taken a meter to it because both MAF signal and IAT signal are 0-5v, no way of distinguishing between the two. The car is very (tuning) dependent upon the MAF signals, I'm not going to guess or experiment, nor will I settle for a "close" wiring diagram. I'll try things on cars I've worked with numerous times, not this one though
Throw an o-scope probe on there and it should be really obvious which is which. Sounds like Nissan swapped out the teal and black wires, and you're reading the diagram backwards, but who knows. If the yellow comes up at +12v, it's definitely worth plugging in your oscilloscope.
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Old 07-21-2011, 12:49 PM   #617 (permalink)
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MAF signal should vary with RPM right? While IAT signal should be fairly stable while not at idle?
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Old 07-21-2011, 01:50 PM   #618 (permalink)
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I can't get a meter on the harnesses with them plugged in, I don't want to strip any wires yet

Here's the info had from probing the harnesses, ignition on, MAF's unplugged

Pass side

Pin 2 (yellow) - 12v
Pin 3 (green) - Signal from sensor to dme
Pin 4 (teal) - Signal from sensor to dme
Pin 5 (pink) - 5v from dme
Pin 6 (black) - Ground

Driver side

Pin 2 (grey) - 12v
Pin 3 (yellow) - Signal from sensor to dme
Pin 4 (brown) - Signal from sensor to dme
Pin 5 (green) - 5v from dme
Pin 6 (black) - Ground

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Old 07-21-2011, 02:34 PM   #619 (permalink)
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Bridged the IAT and MAF +'s, using the signal from the passenger side (lower reading) MAF. First starting the car, the a/f's seem much better than previously, now around 14.6-15.5 sweeping at idle
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Old 07-23-2011, 10:45 PM   #620 (permalink)
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holy god.. i just read this entire thread. all i can say is im glad your sticking with it and it will be all worth it in the end. to the rest of you.. there are some very technical and knowledge based people on here. with all of this info.. this setup has to end up working soon.

best of luck man. im in for updates.
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Old 07-24-2011, 05:38 PM   #621 (permalink)
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At this point, why not just go standalone and MAP metering. Then the piping won't matter.
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Old 07-24-2011, 11:29 PM   #622 (permalink)
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At this point, why not just go standalone and MAP metering. Then the piping won't matter.
There's no standalone currently available for the 370Z. Even if there was, that's another $2k minimum.
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Old 07-25-2011, 12:44 AM   #623 (permalink)
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There's no standalone currently available for the 370Z. Even if there was, that's another $2k minimum.
this is true, but you are pretty much baller

actually I am suprised we don't have a full stand alone yet..
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Old 07-25-2011, 12:58 AM   #624 (permalink)
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Just subscribed. Remember Chris Columbus was looking for India when he found America. Thats supposed to be encouraging.

Very impressed and good luck man.
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Old 07-25-2011, 01:07 AM   #625 (permalink)
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Doesn't UPREV allow you to switch to MAP sensors as opposed to MAF sensors? That would probably be the way to go, especially if you are running higher boost.....

I will be exploring this as well
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Old 07-25-2011, 04:19 AM   #626 (permalink)
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Read all 40+ pages, very cool indeed. I am glad 98intrigue is sticking to it and I am sure he will get it working.
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Old 07-25-2011, 10:45 AM   #627 (permalink)
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I had a friend of mine took the ech and somehow rewired the harness to work on the 370z harness but yea that would be a whole other animal to deal with. stillen manifold will end all the bs lol.
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Old 07-25-2011, 10:46 AM   #628 (permalink)
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this is true, but you are pretty much baller

actually I am suprised we don't have a full stand alone yet..
Why are you surprised?
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Old 07-25-2011, 10:51 AM   #629 (permalink)
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Originally Posted by Nixlimited View Post
At this point, why not just go standalone and MAP metering. Then the piping won't matter.
MAP sensors run on 0-5v just as the MAF's do. You could most likely remove the MAF's and replace them with MAP on the stock ECU and with the proper tune it should work. You'd have to add a separate IAT sensor (also 0-5v) as well
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Old 07-25-2011, 10:53 AM   #630 (permalink)
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MAP sensors run on 0-5v just as the MAF's do. You could most likely remove the MAF's and replace them with MAP on the stock ECU and with the proper tune it should work. You'd have to add a separate IAT sensor (also 0-5v) as well
Signal is probably coded differently though....not sure though.
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