First top mount single turbo 370Z

Red__Zed · 07-21-2011, 12:27 PM

Quote:

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 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.

Abdiel · 07-21-2011, 12:49 PM

MAF signal should vary with RPM right? While IAT signal should be fairly stable while not at idle?

A4RingedONE8T · 07-21-2011, 01:50 PM

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

A4RingedONE8T · 07-21-2011, 02:34 PM

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

ddanis60 · 07-23-2011, 10:45 PM

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.

Nixlimited · 07-24-2011, 05:38 PM

At this point, why not just go standalone and MAP metering. Then the piping won't matter.

98intrigue · 07-24-2011, 11:29 PM

Quote:

Originally Posted by Nixlimited

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.

Isamu · 07-25-2011, 12:44 AM

Quote:

Originally Posted by 98intrigue

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..

Rooster89 · 07-25-2011, 12:58 AM

Just subscribed. Remember Chris Columbus was looking for India when he found America. Thats supposed to be encouraging.

Very impressed and good luck man.

roplusbee · 07-25-2011, 01:07 AM

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

platyperz · 07-25-2011, 04:19 AM

Read all 40+ pages, very cool indeed. I am glad 98intrigue is sticking to it and I am sure he will get it working.

LafitteZ · 07-25-2011, 10:45 AM

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.

Red__Zed · 07-25-2011, 10:46 AM

Quote:

Originally Posted by Isamu

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?

A4RingedONE8T · 07-25-2011, 10:51 AM

Quote:

Originally Posted by Nixlimited

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

Red__Zed · 07-25-2011, 10:53 AM

Quote:

Originally Posted by A4RingedONE8T

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.

07-21-2011, 01:50 PM	#618 (permalink)
A4RingedONE8T Base Member Join Date: May 2011 Location: FL Posts: 30 Drives: Turbo ///M Rep Power: 14	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 Last edited by A4RingedONE8T; 07-21-2011 at 01:54 PM.

07-23-2011, 10:45 PM	#620 (permalink)
ddanis60 Base Member Join Date: Jun 2010 Location: Santa Maria, Ca Posts: 61 Drives: 2007 C6 Z06 Rep Power: 15	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. JIN2012 likes this.

07-24-2011, 05:38 PM	#621 (permalink)
Nixlimited A True Z Fanatic Join Date: Aug 2009 Location: San Diego Posts: 1,235 Drives: 15 GT-R / 11 Prius Rep Power: 26	At this point, why not just go standalone and MAP metering. Then the piping won't matter. __________________ Car Sold! Pleasure being a part of the Z community. New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91)

07-25-2011, 01:07 AM	#625 (permalink)
roplusbee A True Z Fanatic Join Date: Dec 2009 Location: Killeen, TX Posts: 2,360 Drives: 2007 350Z NISMO Rep Power: 22	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 __________________ 2007 350Z NISMO #0618: Zerolift \| UPREV \| F.I. \| Greddy \| Competition Clutch \| Injector Dynamics \| Aeromotive \| Pioneer \| JL

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07-21-2011, 12:49 PM	#617 (permalink)
Abdiel Base Member Join Date: Jan 2009 Location: Detroit, MI Posts: 73 Drives: 09 G37S 6MT Rep Power: 16	MAF signal should vary with RPM right? While IAT signal should be fairly stable while not at idle?

07-21-2011, 02:34 PM	#619 (permalink)
A4RingedONE8T Base Member Join Date: May 2011 Location: FL Posts: 30 Drives: Turbo ///M Rep Power: 14	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

07-25-2011, 04:19 AM	#626 (permalink)
platyperz Base Member Join Date: Jul 2009 Location: SoCal Posts: 81 Drives: 370Z PG A7 Rep Power: 16	Read all 40+ pages, very cool indeed. I am glad 98intrigue is sticking to it and I am sure he will get it working.

07-25-2011, 10:45 AM	#627 (permalink)
LafitteZ Track Member Join Date: Jan 2011 Location: lafitte, la Posts: 698 Drives: 40th anniversary Rep Power: 15	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.