EMB Autotune/O2 Clamp

[Dzaster]

Okay, so we know about the goodness of an O2 clamp/adapter that is helpful on NA ECU/motors.

Now the same guy who makes the O2 clamp that I purchased also puts together a component called the Autotune. This Autotune component is supposed to assist in tuning and also incorporates the O2 clamp in with it. It is also engaged via a Hobbs/Pressure switch.

Anyways, I ordered one and will have some feedback for us once I get it and also when installed. If anyone, has any feedback on it already please share here.

Here is the link:
http://www.miataturbo.net/forum/t2572/


I've also found that the same thing is talked about here.
http://www.bajanchameleon.com/autotune.html

[Accord2nrz]

I would like to know more about it's method of operation since the EMB really has no way of autotuning anything. That was a feature not developed until the Ultimates were released. Rumored that the blue can get in the rough ballpark with the Tools Alpha program which merely adjusts to with a certain range on AFR only in lambda format, not the common stoich ratio we are all accustomed to seeing.

if it's a hardware component I am intrigued as to autotuning revolves around software of some sort.

[Dzaster]

I would like to know more about it's method of operation since the EMB really has no way of autotuning anything. That was a feature not developed until the Ultimates were released. Rumored that the blue can get in the rough ballpark with the Tools Alpha program which merely adjusts to with a certain range on AFR only in lambda format, not the common stoich ratio we are all accustomed to seeing.

if it's a hardware component I am intrigued as to autotuning revolves around software of some sort.

Its a whole combo actually and is only meant to get a DECENT working tune easier--supposedly. He actually gave me the documentation before hand I've read through it once and kinda got lost, but will have to read a couple more times and then actually get it installed and go down the proccess list.

[Dzaster]

So a couple days ago I received my Autotune w/ Built-in O2 sensor clamp. I've not had much time to install, but did so today. Never got to set it up or test so tommorrow. Here is some pics though.

http://i525.photobucket.com/albums/cc340/dzaster96799/Tuning/Autotunefull.jpg
http://i525.photobucket.com/albums/cc340/dzaster96799/Tuning/Autotuneinside.jpg

And here is the schematics for this component.
http://i525.photobucket.com/albums/cc340/dzaster96799/Tuning/oxygenb.jpg


Also, if anyone cares to read up on install/setup, you can download the Autotune Word document HERE (http://files.getdropbox.com/u/766008/Emanage%20Blue/Gold%20Autotune%20NB%20Only.doc)

It also comes with a .GSC file with some preset maps--mainly the Additional Injection map, but ignition map is somewhat setup as well.

So far, Bruce (Aka: olderguy from MiataTurbo.com) has been awesome with answering my questions.

Hopefully I'll have a good report on this tommorrow.

[akinat90]

I think i came in late on the O2 clamp subject. For my car, is this a must have and what are the benifits and $$price?

[Dzaster]

Nah, your setup was already boosted so computer should know that 14.7AFR is not optimal for boost. It's for cars that were previously NA before bolting on a turbo.

O2 clamp discussion see HERE (http://www.diytuning.com/forums/showthread.php?t=145)

[Dzaster]

Oh my!!!:eek:

Well, I am back from initial setup and this Autotune is no joke. Thing held a perfect 11.8 - 12.5AFR throughout the 8 psi I've boosted today. I only did like 5 datalogged runs, but man it is a legitimate device no doubt.

I'm not sure how I am supposed to show you that it works, but I tell you IT WORKS. I know, I'll get some vids of some runs and have my cam directed at gauges and what not. This is the best the car has run since being boosted.

For any DIY'er I recommend this product and as I learn more about the fine tuning process I am right here to help you.

If your interested in buying this is the guy to contact:

Bruce Buchner
bruce@brucebuchner.us
Aka: olderguy on MiataTurbo.com

[akinat90]

Nah, your setup was already boosted so computer should know that 14.7AFR is not optimal for boost. It's for cars that were previously NA before bolting on a turbo.

O2 clamp discussion see HERE (http://www.diytuning.com/forums/showthread.php?t=145)

Actually my car IS a NA thats boosted, sorry if you guys got the impression it wasn't. I hope the answers i got through the thread wasn't based on the impression that it was not a boosted NA.

So i guess the original question still stands. Thanks in advance

[Dzaster]

You could for sure benefit from a O2 clamp then. I actually have mine for sale minus the pressure switch. Willing to part with it for $25 shipped US. As for the pressure switch, you can get one for $25 from Bruce on MiataTurbo.

LMK, but yes you could use it.

[Dzaster]

Went out to the video store tonight. When I had gotten my video I got back into the car. Coolant temp was warmed up so I figure I was cool to boost. However, as I was pulling out I laid into the gas and as soon as the pressure switch for the Autotune kicked in it was like I hit fuel cut--it basically was. This happened because the O2 sensor was not warmed up thus not yet in open loop.

The Autotune document talks about this happening if you have a single wire O2 sensor. Well, I have a 2 wire one, and I do not think it has the heater properties.

So.........I'm gonna install a 4 wire heater type O2 sensor in hopes that I can get the car to operate in closed loop much quicker.

Here is an informative piece on Oxygen sensors.
http://www.aa1car.com/library/o2sensor.htm

Has anyone converted a 1 or 2 wire O2 sensor to teh heated 3 or 4 wire type?

[Dzaster]

Okay, so I found another small problem. Since the Autotune translates AFR's via the narrowband and tells the EMB what type of fueling it needs to be doing, it totally cannot account for my methanol injection kit. I found this out when the alky injection engaged and teh car bogged and my AFR's on the WBO2 went rich. It is my understanding that narrowband O2 sensors cannot detect methanol.

I then tried to use the WBO2's simulated narrowband output signal to wire into the Autotune, but the simulated signal is just not the same--even though I was warned by Bruce B. that simulated doesn't work right with teh Autotune. If it did that would have been the ticket.

So as it is now, I've since gone back to the Autotune with narrowband and all is well. However, I am unsure what I should do with the meth injection kit. Any suggestions? I'm kinda considering just doing water injection, thus eliminating the need to trim out fuel.

However, I've done nearly 10psi boost today without it and teh car seems to do quite well.

[Dzaster]

Alright, so here is one of my little test runs. Two of the possibly better runs, I apparently didn't hit record when I was supposed to on the cam so this is what I have. :haha: This one is decent though.:dunno: Pay attention to the bottom(farthest from camera) gauge. That's the WBO2(AFR's).

Video: Autotune Holding Safe AFR (http://files.getdropbox.com/u/766008/Nice%20AFR.wmv)

Here's a log of one of the tunes that nice safe AFR was maintained.

http://i525.photobucket.com/albums/cc340/dzaster96799/Tuning/datalog.png

Greddy Sensor Voltage of 2.10V = 8.70psi boost

So in that run I only did ~8psi.:weeping: Actually I am going easy for now with this.


The Throttle Position % is not really TP. It is actually where the Autotune routes the Stock(narrowband) O2 signal(voltage) through the EMB, and the EMB has a Additional Injection Map that is specifically designed/setup to alter fuel to maintain a targeted AFR. For me, I'm shooting for 11.5:1AFR. And that is basically what you see in that video of the WBO2 gauge.

[messiahx]

That is really cool. So let me see if I'm getting this straight...the additional injection map is being used to add or remove fuel based on the input from the stock o2 sensor. So if the voltage translates say to 50%, which is lean, and you want it to be at 48%, you would add to the injector duty cycle in the 50% cell?

For your question on meth injection, I think you should take a look at this thread: http://www.miataturbo.net/forum/t35717/ on MT.net.

[Dzaster]

You know I am want to try and understand it eventually, but to be honest, and this is kinda bad, I have not looked into how its doing what its doing. What you are saying does sound plausible, but I am kinda dopey from some night time allergy medicine I just took and man I am kinda ready to go shleep.:D

However, if you'd like to have a look see at my .GSC in its current state--as in on the EMB when I did that run in teh video--click and download HERE (http://files.getdropbox.com/u/766008/Autotune/-20%20Airflow.GSC).

[Dzaster]

So I wired up a 4 wire heated O2 sensor to replace my stock 2 wire one.

I used a heated 4 wire sensor from later model tercels(OBD2). 2 wires from sensor, signal(blue) and ground(white), are same color so just popped out those two pin/wires and inserted them into my 2 wire O2 clip so I could plug that portion into the harness like stock. However, the 2 left over wires were same color--black. One goes to 12v and the other to ground chassis.
http://i525.photobucket.com/albums/cc340/dzaster96799/WIP%20Thread/PIC-0075.jpg

Wired in a little 5amp fuse for safety's sake.
http://i525.photobucket.com/albums/cc340/dzaster96799/WIP%20Thread/PIC-0076.jpg
It's temp. I need a inline fuse, but had none.


http://www.aa1car.com/library/o2_wire_chart.jpg

Taken from this writeup HERE (http://www.aa1car.com/library/o2sensor.htm)


And so far it works. I am kinda concerned though whether or not it is okay to have the heater element always powered.:confused: I was thinking some sort of toggle routed in-cabin perhaps that can cut power once heated.


Here's another pull this evening.
http://i525.photobucket.com/albums/cc340/dzaster96799/Videos/th_AutotuneNightTimeAFR.jpg (http://s525.photobucket.com/albums/cc340/dzaster96799/Videos/?action=view&current=AutotuneNightTimeAFR.flv)


And the log from that pull.
http://i525.photobucket.com/albums/cc340/dzaster96799/Tuning/AutotuneLog2.png

Nearly 10psi.

[Accord2nrz]

Shouldnt be a problem, the heater circuit is to heat the sensor initially to temp so it can take accurate readings faster. After that the EGTs should keep it heated.

[Dzaster]

That is really cool. So let me see if I'm getting this straight...the additional injection map is being used to add or remove fuel based on the input from the stock o2 sensor. So if the voltage translates say to 50%, which is lean, and you want it to be at 48%, you would add to the injector duty cycle in the 50% cell?

For your question on meth injection, I think you should take a look at this thread: http://www.miataturbo.net/forum/t35717/ on MT.net.
Thanks for that thread. I read that one and a good deal of others all over the net. I've gotten my fill on the subject. I understand that the Autotune can, and as of today's 10 runs, has ran fine at ~11:1AFR and is perfectly able to tune with meth/water injection. Learned a good deal of other little things like achieving true 50/50 mixture.

So it looks as though I'm keeping the meth kit.:D Thanks again.

[Dzaster]

So I was using the Autotune on my NA computer/electronics. now i have boosted computer and electronics I'm looking to sell. Keep in mind, its for those looking to run the Emanage Blue on stock naturally aspirated car/computers.

It comes complete the way I got it with the Autotune unit, Hobbs/pressure switch, install and setup directions, and a base map that you'll have to do some easy/quick fine tuning.
http://i525.photobucket.com/albums/cc340/dzaster96799/Tuning/Autotunefull.jpg


And HERE (http://www.bajanchameleon.com/autotune.html) is a link where it is discussed in decent detail.


And THIS (http://www.miataturbo.net/forum/t2572/) is where I bought it from.

and here's a vid i made the same evening of install. AFR is the one nearest the bottom left of the screen.
http://i525.photobucket.com/albums/cc340/dzaster96799/Videos/th_AutotuneNightTimeAFR.jpg (http://s525.photobucket.com/albums/cc340/dzaster96799/Videos/?action=view&current=AutotuneNightTimeAFR.flv)

$100 shipped anywhere even the moon.:lachen:

[mijos87]

i know its 2 year old thread but i figure it was worth a try, do you still have that auto tune for 100 for sale?

[Accord2nrz]

Could of sworn someone on this site makes these things now...

[Dzaster]

I don't have it no, but the guy who makes it is on MiataTurbo.