NefMoto > Technical > Tuning > Uncertain about my Ignition and STFT
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Author Topic: Uncertain about my Ignition and STFT  (Read 20709 times)
NOTORIOUS VR
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« Reply #15 on: August 10, 2015, 11:47:08 AM »
Quote from: Jim_Coupe on August 10, 2015, 11:40:19 AM
Well I hope not.. They are calibrated towards fresh AIR at factory 21:0

You are misunderstanding...

We're not talking about free air calibration... We're taking about YOUR logs and the conversion factor you are using.

Most logging software reading AFR is on a gasoline scale.  So unless you have modified the conversion factor to measure in the E85 AFR scale you are not interpreting the O2 readings correctly.

The ECU/O2 sensor doesn't read in anything but Lambda.  The conversion is done outside by whatever software you are using to log with.

Similarly so, if you have an external wideband sensor, most are setup to read in Gasoline AFR scale.  Running E85 will not magically change the scale, the wideband has to have an option for you to change the internal scaling.

In the end it is not necessary anyway.  With E85 you simply target the same AFR as on a gasoline scale anyway. Lambda 1= 14.7 gasoline 0.8 lambda = 11.76 gasoline, etc, etc.
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« Reply #16 on: August 10, 2015, 11:47:30 AM »
Are you being dense on purpose to mess with us? LISTEN, lambda is lambda, different fuels have different scales. cool after market gauges and loggers can be setup to run different scales. if you did not do this you are reading a gas scale and super rich.

everyone is repeating themselves. when you free air calibrated your sensor, it did not set it up for the FUEL type. I never change this, because it just confuses people. Use whatever fuel you wish, tune for common afr for your setup.
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« Reply #17 on: August 10, 2015, 11:48:11 AM »
holy crap, lol
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technic
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« Reply #18 on: August 10, 2015, 03:49:05 PM »
Quote from: Jim_Coupe

Knocking is knocking isnt it?  With E85 it doesnt knock anyway.. it just get warm.

No. Ping sound is different with alcohol, and knock filters are calibrated for petrol "pitch"
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Jim_Coupe
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« Reply #19 on: August 11, 2015, 12:52:32 AM »
Quote from: Snow Trooper on August 10, 2015, 11:47:30 AM
Are you being dense on purpose to mess with us? LISTEN, lambda is lambda, different fuels have different scales. cool after market gauges and loggers can be setup to run different scales. if you did not do this you are reading a gas scale and super rich.

everyone is repeating themselves. when you free air calibrated your sensor, it did not set it up for the FUEL type. I never change this, because it just confuses people. Use whatever fuel you wish, tune for common afr for your setup.

No im not being dense.. Im trying to learn about what i have misunderstood because I have been mislead by people who have claimed that these logs are OK. But now im not really sure... And even more uncertain about that now. And you could be very correct that im running really rich.. That will explain alot!

About knocking with E85.. ive been told by a tuner that tunes VEMS systems that E85 is very hard to detect knocking if even at all.. ?  True/False?
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E85oholic
Jim_Coupe
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« Reply #20 on: August 11, 2015, 01:01:10 AM »
Im gonna take her for a rind and log Lambda.. I´ll be back
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E85oholic
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« Reply #21 on: August 11, 2015, 09:25:23 AM »
true on e85 not really ever "knocking"

wasnt trying to be rude, it just felt like the thread was going in circles.

get your afr monitoring systems specs checked 100% so you can make sure you are interpreting the data correctly.
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technic
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« Reply #22 on: August 11, 2015, 09:54:11 AM »
No, not knock as such, but you can register it. Take a pair of "det-cans" and listen when engine is close to knock limit and you will hear CF clearly.
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IamwhoIam
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« Reply #23 on: August 11, 2015, 01:02:39 PM »
oh so CF can be heard now Cheesy this gets better and better. technic, please keep going, I'm gonna grab some pop corn Cheesy
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I have no logs because I have a boost gauge (makes things easier)
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« Reply #24 on: August 11, 2015, 01:57:50 PM »
Wtf... not CFs Roll Eyes I should avoid having VCDS spreadsheets open at the same time as writing posts. I should PayPal you some money for the popcorn
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Jim_Coupe
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« Reply #25 on: August 11, 2015, 03:20:34 PM »
Was loggin some tonight.. Fronted a deer...  Sad   I got my logs though.. I´ll upload my Lambda log tomorow... after ive called insurance company.. Undecided
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« Reply #26 on: August 11, 2015, 11:33:01 PM »
Only Lambda i could find in Torque was "Commanded Equivalent Ratio".

In Torque I also discovered that i have slected E85 as fuel.. So  i think the AFR is correct.. It cant possible run Extremely rich.. Otherwise i would smell that.. Car runs pretty good.. But i was just uncertain about AFR in higher load area..
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« Reply #27 on: August 12, 2015, 05:02:03 AM »
I'm gonna put this out there and say before you go any further, get actual logging software working.  Hell, VCDS is better than this crap!
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Jim_Coupe
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« Reply #28 on: August 12, 2015, 05:09:52 AM »
Quote from: adam- on August 12, 2015, 05:02:03 AM
I'm gonna put this out there and say before you go any further, get actual logging software working.  Hell, VCDS is better than this crap!



Why is this Crap?
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E85oholic
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« Reply #29 on: August 12, 2015, 06:13:15 AM »
Because you've not got any of the variables you need to get a good log.

What is your requested lambda? Actual?  Trims?  Where is it getting lambda from?  EGT?  Modelled EGT?
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