in the wide band o2 gauge. choose lambda in the drop down menu. it is there.


beers

 

Oxyclean?

 

Mine runs on Oxycontin.

 

Well, I would understand if the sensor measured the relative quantities of O2, HC, CO, etc.. But if it's only measuring O2 that is giving you an incomplete picture... To get a lambda value from that aren't you making assumptions about combustion efficiency among other things? In that case are the UEGO sensors truly universal and are their readings equivalent between engines?

 

Its measuring the amount of O2 outside the engine vs. the amount that comes through the tailpipe.
It doesn't care anymore about the nitrogen or whatever than it does about the ethanol or the heptane.

 

Essentially, 1.0 means there is no excess oxygen, and no requirement for more oxygen.

Here is an article a little more about it...

http://en.wikipedia.org/wiki/Oxygen_sensor

Cheers,
Hymee.

 

Alright so essentially aiming for 1.0 at WOT or cursing? From whats being said up top lower the decimal (.95) is richer and higher the decimal (1.1) leaner for lambda. My other question is does the Cobb Accessport with the tuning software have a lambda setup to tune with? I have seen DSM guys tune with lambda but never realized what was going on other then aim for .85 to .88 at WOT and close to .95 to 1.0 for cursing.
Basically what I'm saying is 12.6ish for under boost and cursing it can be ran leaner since your not trying to build boost for fuel efficiency. That was with a SAFC which sucks in my mind after seeing my buddy tune with AEM EMS....I love that lol.

 

tell it too it already does you just need to choose that option instead

 

I'm not sure why you are cursing at your lambda, but you should probably go read the "So You Wanna Be a Tuner" thread before you go any further since you have it almost completely wrong.

 

OK. I stand corrected. This patent is a little more specific.

http://www.google.com/patents?vid=USPAT4915814

Cheers,
Hymee.

 

Thanks guys, I'll read the patents when I get home and hopefully that will unconfuse me...

 

Will do, thanks for the thread name!

 

Bringing that which is buried in this thread to the surface.

NA makes peak power around .85 lambda on the dyno. Anything leaner does not seem to provide significantly more horsepower but does raise EGTs which should shorten the life of your cat.

 

the rest of the world disagrees with the above statement... including Motec and the Star Mazda series

 

Proper lambda targets are not a static value.
At WOT and RPM in a very small range, .85 - .89 produces good power.
In other ranges, .92 produces more power.

As OldDragger pointed out, don't worry about the numbers. Give the engine what it is asking for. You can only find that out with experimentation on your own.

 

Please post that at the beginning of the thread next time.

 

Is post number 5 close enough to the beginning for you?

 

Hey, my friends, where's the beef?

 

Why are you asking a question that has already been answered by Mazda themselves? We learned from the Star Mazda Series cars that they targeted 13.5:1 AFR (.92 - .93 lambda) at the open-loop area.

BTW, there is no safe tune for the catalytic converter that comes on our cars if you ask me.

 

Yeah, that is basically true.
Any tune is going to compromise it. Even the stock tune compromises it, but they try to get it to live long enough that they don't get in trouble with the Fed.

 

Im sorry but i have to ask
what is the Ve exaclty?
i see the map in mazdaedit but i dont know what it is for
i would appreciate an answer ^^

 

Nice 13 year bump!

I doubt you'll get an answer from a member whos been banned for a long time.

Ve = Volumetric efficiency

 

thx mate XD
yeah i know i was quite late with this post but i scaned a lot of postes from back to front to lock for this
i googled like 2h for this so i was frustrated

okey sorry to waste your time but i need to ask
how does changing this Volumetric efficiency change the behavior of the engine?

 

Right so summing up Ve is basically the ratio of air/fuel mixture the engine can suck in during intake stroke at atmospheric pressure (naturally aspirated). So increasing(forced induction) or decreasing the Ve will increase or decrease the engines power output.

 

So you can raise the VE by using FI and this will increase the power.
But what is the purpose of the map that you can edit? In the case of FI, does telling the ECU via this table change anything or will editing it have no effect?
And does it "comunicate" with the MAF sensor to calculate how much air is going into the engine?
Or is it just a "information" sheet to tell you how much bar you get at NA?
I am really sorry for all these questions but with the knowlage i have at the moment i dont understand what the purpose of it is.
And i really want to understand it so i would really appreciate if you could help me out. ^^