Ignition advance

[spyderturbo007]

People
There is something is make me crazy!
Is another post Ive read:
Post:
http://dsmtuners.com/forums/showthread.php?t=204734&page=2

"RPM Air Timing o2
2760 6.81 16.5 .86
3008 9.38 9.5 .86
3352 12.25 10 .92
3752 13.82 9.5 .94
4140 15.35 11.2 .94
4504 16.9 12.5 .94
4876 18.11 11.5 .96
5216 19.45 13.5 .96
5556 19.83 16.0 .96
5868 21.25 16.5 .96
6152 21.54 18.0 .96
6420 21.56 18.5 .96
6676 21.19 19.5 .94
6904 20.83 18.5 .94

That's a purty' log you got there. " etc etc etc

We can read lambda = 0.94
That means 94% of 14.7 = AFR 13.8 (!)
How is that posible???
Andymoraitis said (in this very post):
"1000% dead nuts, balls on correct. 12.5:1 on pump is insane on a turbo motor"
Then 13.8 is super leaner!
Please somebody explain me WTF is going on? WTF

Thanks

I have no idea what you are talking about. I don't even see why you are asking about that log, since it isn't even yours????? I'm confused.........

 

[spyderturbo007]

People
There is something is make me crazy!
Is another post Ive read:
Post:
http://dsmtuners.com/forums/showthread.php?t=204734&page=2

"RPM Air Timing o2
2760 6.81 16.5 .86
3008 9.38 9.5 .86
3352 12.25 10 .92
3752 13.82 9.5 .94
4140 15.35 11.2 .94
4504 16.9 12.5 .94
4876 18.11 11.5 .96
5216 19.45 13.5 .96
5556 19.83 16.0 .96
5868 21.25 16.5 .96
6152 21.54 18.0 .96
6420 21.56 18.5 .96
6676 21.19 19.5 .94
6904 20.83 18.5 .94

That's a purty' log you got there. " etc etc etc

We can read lambda = 0.94
That means 94% of 14.7 = AFR 13.8 (!)
How is that posible???
Andymoraitis said (in this very post):
"1000% dead nuts, balls on correct. 12.5:1 on pump is insane on a turbo motor"
Then 13.8 is super leaner!
Please somebody explain me WTF is going on? WTF

Thanks

I have no idea what you are talking about. I don't even see why you are asking about that log, since it isn't even yours????? I'm confused.........

 

[eclipse98gs-t]

Sorry if i cant explain very well.
My english is very poor.
Point is, andymoraitis wrote in this thread :"1000% dead nuts, balls on correct. 12.5:1 on pump is insane on a turbo motor"
My doubt is about AFR.
0.94 volts is 13.8 afr (that is in log i posted before)
If 12.5 : 1 is INSANE , how can be posible 13.8 : 1 ???
Im learning to tune, and i really confused now.
I hope you understand what im trying to tell
I was reading some info about lambda ratios and they said for example... 0.84 is 84% of 14.7.
Is this correct?

 

[GVR4592]

.94 volts isn't Lambda, it's the primary oxygen sensor voltage, it really doesn't mean anything.

 

[T9S1i]

People
There is something is make me crazy!
Is another post Ive read:
Post:
http://dsmtuners.com/forums/showthread.php?t=204734&page=2

"RPM Air Timing o2
2760 6.81 16.5 .86
3008 9.38 9.5 .86
3352 12.25 10 .92
3752 13.82 9.5 .94
4140 15.35 11.2 .94
4504 16.9 12.5 .94
4876 18.11 11.5 .96
5216 19.45 13.5 .96
5556 19.83 16.0 .96
5868 21.25 16.5 .96
6152 21.54 18.0 .96
6420 21.56 18.5 .96
6676 21.19 19.5 .94
6904 20.83 18.5 .94

That's a purty' log you got there. " etc etc etc

We can read lambda = 0.94
That means 94% of 14.7 = AFR 13.8 (!)
How is that posible???
Andymoraitis said (in this very post):
"1000% dead nuts, balls on correct. 12.5:1 on pump is insane on a turbo motor"
Then 13.8 is super leaner!
Please somebody explain me WTF is going on? WTF

Thanks

Is that how you are calculating your a/f ratios? If you arent using a wideband o2 sensor to find a/f ratio then your tuning calculations could be a bit off.
Since you are tuning, you must have a logger, why dont you post up some logs and let us take a look.
like gvr4592 said, that ".84" is o2 voltage, not lambda, so you cant figure out your a/f ratio from the o2 voltage.

 

[eclipse98gs-t]

Is that how you are calculating your a/f ratios? If you arent using a wideband o2 sensor to find a/f ratio then your tuning calculations could be a bit off.
Since you are tuning, you must have a logger, why dont you post up some logs and let us take a look.
like gvr4592 said, that ".84" is o2 voltage, not lambda, so you cant figure out your a/f ratio from the o2 voltage.

Hey, do not confuse.
i have a logger, i have a Haltech ecu.
My AFR is 11.3.
Just i have a doubt because i was reading about o2 volts and lambda and many things to tune and i dindnt understand what is 0.84 or 0.94, because i only knows AFR like 12.5, 11.3 , etc.
Well please somebody explain why in my innovate wideband, when afr is on 12.4 apear 0.84 too... what is 0.84 and how can i tune with that number?
Thanks

 

[T9S1i]

.84 is your o2 voltage. Some people use it to estimate a/f ratios, but its not a consistent method of tuning. If you have a wideband reading with your logger than just use that, narrowband o2 can be used for other things. I only use o2 voltage to make sure my car is switiching from open to closed loop operations and vice versa at the correct times, also to make sure it is alive and cycling properly. For any a/f ratio readings, i refer to my wideband, if you have the correct tool why not use it?

Last, remember that all cars arent the same. Just because you are at 12.4 wideband and .84v narrowband (o2 sensor) doesnt mean if someone else has o2 readings of .84 they have the same a/f ratio as you do. Many factors can come into play that will change o2 voltage.

Hope this helps, let me know if anything needs to be explained better.

 

[GVR4592]

The Innovate widebands can display Lambda and A/F ratio. 12.4:1 A/F is equal to .84 Lambda. If you are using gasoline then you divide your A/F ratio by 14.7 and that will give you the Lambda number. It's a nice feature if you are running someting other than regular gasoline, like Methanol, Ethanol, Propane, etc.

If you are only using gasoline as a fuel then you don't really need to pay much attention to Lambda. Some people prefer to tune using Lambda instead of A/F ratio, but for most it's easier to use A/F ratio.