Hey,
I need a little help with reading the stock wideband O2 sensors and wiring a greddy emanage blue.
I plan on tuning on the stock wideband O2s. Im attempting to tackle the tuning issue on a small budget cuz I think I probably can. This would also help figure out if we even need to get an aftermarket wideband for NA tuning on the 04.5+ Z or if all that hyped up info about "needing" one to stop your engine from grenading was just pure certified broscience (i.e bullshytt). Afterall, the AFR data from it is good enough for the stock ECU.
Does anyone have any data logged on the stock O2 voltage readings vs air fuel ratio on part throttle and WOT?
I searched a lot, and could not find any data on AFRs based on stock wideband voltage outputs. I also came accross substancial amounts of shytty (made up bullshyt) information about our EMS and sensors going around so I thought its better to ask for first hand info. I have 2 issues I need information on.

Issue #1: reading the stock wideband O2 sensors. Does anyone have any data logged on the stock O2 voltage readings vs air fuel ratio?
I should be able to read the voltage outputs of the pre-cat wideband O2s by using a OBD scanner tool. Will probably use android on windows to log data. I believe if the accuracy of these sensors is good enough for the ECU then its good enough for my NA tuning. If true, it would mean a lot of 350z owners did not have to spend $$ on aftermarket widebands.

I found some information on the 04.5 & 05+ wideband sensors (0133 chart looks the same I believe)
and I believe that graph in the middle right shows correlation between voltage and AFR. Is anyone able to confirm this? I believe this is from an 07+ service manual.



Issue#2: Wiring the Greddy e-manage blue
I picked up an emanage blue for $100 and the LED lights turn on when I connect it to a 12V battery so I guess it works.

I am looking at how to wire it into the ECU harness....now I see that the emanage blue only has 4 injector wires while the vq35de has sequential injecton/MPFI (probably 6 injector wires).
Ive seen threads showing vq35s gaining whp through emange blue tuning. Im wondering if anyone here knows how to wire these 4 injector wires (or less than 4) in semisequential order to 6 injector wires. In semi sequential order I should be able to wire upto 8 injector wires. Does anyone here know how this would work? the injector pulses will be sent by the stock ecu in sequential order (independant) while the piggyback emanage will have to modify them through 4 wires?


On further research I found that connecting to these injectors is not compulsory but in the case of after market injectors I will need to. I still would like to connect to them if possible without losing sequential injection.
"the Emanage Blue can alter the A/F ratio with only the main harness wired in by altering the maf signal just as a safc would...but you only add the injector harness if you want to alter the inj duty cycle as well which is simply for more advanced tuning of the fuel to seperate injectors individually and such..."
-michaelnadens, 5/22/2006, maxima.org

btw...just installed this vent with a 1.5inch penknife...it's got me hyped about modding again. Ebay FTW! the vent was like $50 or maybe a bit more.

 

If I remember correctly when I had one on my maxima there were optional harnesses for injectors and ignition coils to adjust fuel and timing. You can just use maf and rpm to tune the fuel a little but using the emanage in this way is almost pointless and wont see much gain.

 

Emanage blue is junk. Ppl blew up tons of motors with these on early turbo kits because there was no timing control. Seems like you can buy an additional timing harness now.

Emanage ultimate can control timing and is on par with a UTEC.

If you want to spend teh time wiring it in, use and autosport extension harness to cut the ignition and injector wires, and dont cut the OEM harness.

I'd sell it though and not even mess with it

 

Yes, I got mine with both harnesses but from an s2000 so I have to splice the wires myself and I should be able to retard timing for nitrous use.

Why would it be pointless? (NA tuning)
Bolt on mods throw off the stock AFR by a bit, especially test pipes... all I have to do is to fix that inorder to get more out of my bolt ons right? Im not looking to advance timing at all.
Do you remember the emanage blue jumper and dial settings for vq35de?

Its not junk. Its better than SAFC and SAFC has gotten vq35de maxima and sentra owners some gains. There is timing control on emanage blue but you can only retard timing. This is some broscience going around that it cant retard timing. and for this an additional wiring harness is required which I have. Eitherway, Im NA at the moment.

Show me an example of a blown motor with an emanage blue if there really are tons of these incidents and i'll show you blown motors with UTEC and cobb.

Im just gonna splice the stock harness... this is not a ferrari, its my DD nissan. Im not spending more than what I paid for the emanage blue on wiring harnesses and Its only 6 wires I have to splice up, how long could it take.


I appreciate the advice...
ps, please dont spread broscience.

 

The reason blown engines happen with emanage blue is really that the ECU will try to compensate for changes made by the emanage to get things back into stock parameters or throw the ecu into closed loop when things are too far off. For your purpose it should be okay, but if you look into doing FI later or any more significant mods I would switch. Ive had the cobb and utec before aswell and recently switched to uprev. I definitely say uprev has been the easiest to use and the smoothest running.

 

Please show me any record of a blown vq35de caused by an emanage blue that you claim/support.


I understand that we can theorize scenarios and make assumptions. But those are not facts, they are assumptions.


Its not easy to pinpoint the cause of a catastrophic engine failure...even if you have a black box cuz human error.

 

Just do a search yourself. Especially if youre going to question everything that people suggest to you and call it "broscience". The answers are out there if you search. There are even threads about the ecu compensating back to oem parameters with SAFC and people recording the voltage changes done by the ecu over time compared to when they get it tuned using safc and emanage blue. It also happened to my supercharged 97 Maxima. Blew the rings due to it leaning out from going into closed loop, but at the time I built it, emanage blue was the best option out.

For you it won't matter anyway. Even if it did lean out with the mods you have it wouldnt cause any harm, just a slight power loss. It is only catastrophic for FI people.

Im not saying emanage blue is bad in general. Its a great product, just not great on this platform. If you had a honda it would work great with no problems.

 

What I was referring to broscience was all the bashing going around about stuff making your engine blow up. Everytime I search for anything regarding 350z and emanage blue, all I find is people talking **** and bashing the product and almost no useful technical information. With maxima forums I find some useful stuff but not enough.

So, I made a thread thinking maybe it will lead to some useful info, and guess what...more bashing regarding the product. i.e it is junk

and more guidance to which tuning systems I should support. I mentioned at earlier its for an NA 350z and maybe nitrous in the future which is open loop so its fine.

Look at the threads regarding 350z and emanage blue and see how much BS is in there. G35 forums are similar but a little less BS and maxima forums are actually somewhat useful regarding the issue.

I searched and could not find any vq35de's that were blown due to fault from an emanage blue.

referring to someone else thread regarding gains.
http://g35driver.com/forums/engine-d...nod-today.html

 

In order to log the stock wb o2 sensor activity you will need Cipher.

I understand what you are trying to do with respect of simplicity. If you want to pick up some additional timing with the e-Manage Blue, you can purchase larger injectors.

This will require you to reduce the airflow signal going out of the e-Blue to maintain your desired AFR, which forces the stock ECU to look at a low load cell, thus increasing ignition timing.