afr question advice??

cesarortiz23 · 03-22-2018, 01:45 AM

hello you guys so lately i have been putting more attention to my gauges on my phone while i drive or even wot and im noticing that my afr is at 14.5 14 around that area

can anyone tell me whats a good afr

my mods are catless downpipe charge pipe obviously jb4

occasionally i might run 4 gallons or so of e85 but that doesn't seem to change the afr neither

it still stays at 14.5 or 14 or so.even with just regular 91 or a mix

on map 5 map 1 or map 2 i still stay around the 14.5 14 area?

is this good is it bad am i running way too lean???

or what are you guys recommendations

thanks

Gangplank · 03-22-2018, 06:40 AM

Let's of info available...

http://bfy.tw/HFcB

cesarortiz23 · 03-22-2018, 09:50 AM

Quote:

Originally Posted by Gangplank

Let's of info available...

http://bfy.tw/HFcB

sorry if this thread bothered you to the max lol

Couldn't really get a clear answer

With my current mods etc.

cesarortiz23 · 03-22-2018, 10:01 AM

Quote:

Originally Posted by Gangplank

Let's of info available...

http://bfy.tw/HFcB

Plus all the research I did it seems I have a lean afr compare to most people

Now what's my next move to fix it or get it right or ?

That's where I'm trying to get at

Do I need a tune ?

:

519.E82 · 03-22-2018, 02:15 PM

Quote:

Originally Posted by cesarortiz23

Quote:

Originally Posted by Gangplank

Let's of info available...

http://bfy.tw/HFcB

Plus all the research I did it seems I have a lean afr compare to most people

Now what's my next move to fix it or get it right or ?

That's where I'm trying to get at

Do I need a tune ?

:

Quote:

Originally Posted by cesarortiz23

Quote:

Originally Posted by Gangplank

Let's of info available...

http://bfy.tw/HFcB

Plus all the research I did it seems I have a lean afr compare to most people

Now what's my next move to fix it or get it right or ?

That's where I'm trying to get at

Do I need a tune ?

:

1) the ideal air fuel ratio is 14.7 so i would say you're good
2) if you're running E85 with a proper kit for it (requires stronger/better lines) i would recommend having a tune as you have the ability to run more power with it

cesarortiz23 · 03-22-2018, 02:31 PM

Quote:

Originally Posted by 519.E82

Quote:

Originally Posted by cesarortiz23

Quote:

Originally Posted by Gangplank

Let's of info available...

http://bfy.tw/HFcB

Plus all the research I did it seems I have a lean afr compare to most people

Now what's my next move to fix it or get it right or ?

That's where I'm trying to get at

Do I need a tune ?

:

Quote:

Originally Posted by cesarortiz23

Quote:

Originally Posted by Gangplank

Let's of info available...

http://bfy.tw/HFcB

Plus all the research I did it seems I have a lean afr compare to most people

Now what's my next move to fix it or get it right or ?

That's where I'm trying to get at

Do I need a tune ?

:

1) the ideal air fuel ratio is 14.7 so i would say you're good
2) if you're running E85 with a proper kit for it (requires stronger/better lines) i would recommend having a tune as you have the ability to run more power with it

I'm only running e85 every now and then

And max 4 gallons

Only mods are

DP
CP
Bmw ppk
jb4
Custom exhuast
I run map 2 or 5

blue135 · 03-22-2018, 04:31 PM

519 - thank you. I just could not remember that Stoichiometric number.

OkieSnuffBox · 03-22-2018, 04:52 PM

Quote:

Originally Posted by 519.E82

1) the ideal air fuel ratio is 14.7 so i would say you're good
2) if you're running E85 with a proper kit for it (requires stronger/better lines) i would recommend having a tune as you have the ability to run more power with it

Uhhh no. No one runs turbo cars at stoich under load, you don't even run N/A cars that lean unless they are in cruise. Even NA cars aren't typically tuned leaner than 13:1.

11-11.5:1 under load, the bit of extra fuel helps cool the combustion chamber and help with knock prevention.

519.E82 · 03-22-2018, 04:54 PM

Quote:

Originally Posted by OkieSnuffBox

Quote:

Originally Posted by 519.E82

1) the ideal air fuel ratio is 14.7 so i would say you're good
2) if you're running E85 with a proper kit for it (requires stronger/better lines) i would recommend having a tune as you have the ability to run more power with it

Uhhh no. No one runs turbo cars at stoich under load, you don't even run N/A cars that lean unless they are in cruise. Even NA cars aren't typically tuned leaner than 13:1.

11-11.5:1 under load, the bit of extra fuel helps cool the combustion chamber and help with knock prevention.

Saw this on todays post, kinda forgot this was for a 135i, my B. But everything else still applies

iminhell1 · 03-22-2018, 05:56 PM

You're looking at the gauge wrong / at wrong time.

Post a log!

cesarortiz23 · 03-22-2018, 06:15 PM

Quote:

Originally Posted by iminhell1

You're looking at the gauge wrong / at wrong time.

Post a log!

Ima have to do a lot on a 3 or 4th gear pull

Is just raining here in SoCal so I'll wait for it to dry up

I have some small little logs of some pulls
Idk if that would work

cesarortiz23 · 03-22-2018, 06:18 PM

Here goes some logs I did but idk if they would work or help

iminhell1 · 03-22-2018, 06:32 PM

Looks fine to me. Near that 4K mark is where AFR tends to target lower, 12.2 or lower depending on tune.
But based on the trims I can tell there is still E85 in there.
And why the ignition is so choppy, I don't know. Need more data. Probably DTC kicking it.

You need to do logs with traction full off, and a solid 3rd gear, from 3K to redline would be nice.

cesarortiz23 · 03-22-2018, 06:34 PM

Quote:

Originally Posted by iminhell1

Looks fine to me. Near that 4K mark is where AFR tends to target lower, 12.2 or lower depending on tune.
But based on the trims I can tell there is still E85 in there.
And why the ignition is so choppy, I don't know. Need more data. Probably DTC kicking it.

You need to do logs with traction full off, and a solid 3rd gear, from 3K to redline would be nice.

I should do some logs tomorrow

iminhell1 · 03-22-2018, 09:04 PM

Here is one I just pulled. I'm flash only, MHD E60 map; MHD version 1.66 IJE0S v7.1 E60AT_ALP

You can see it's about the same trend, near that 4K mark it starts to richen up.

Gangplank · 03-23-2018, 07:54 AM

Quote:

Originally Posted by cesarortiz23

Quote:

Originally Posted by Gangplank

Let's of info available...

http://bfy.tw/HFcB

sorry if this thread bothered you to the max lol

Couldn't really get a clear answer

With my current mods etc.

Didn't bother me at all. Just helping with a quick google'n.

OkieSnuffBox · 03-26-2018, 09:24 AM

Quote:

Originally Posted by 519.E82

Saw this on todays post, kinda forgot this was for a 135i, my B. But everything else still applies

Not really. An ICE isn't ever tuned for stoich. Richer under load, much leaner at cruise and let the cat take care of the elevated NOx emissions.

BimmerAg · 03-26-2018, 02:41 PM

Quote:

Originally Posted by OkieSnuffBox

Not really. An ICE isn't ever tuned for stoich. Richer under load, much leaner at cruise and let the cat take care of the elevated NOx emissions.

Three-way catalysts don't reduce NOx under lean operation

cesarortiz23 · 03-26-2018, 10:49 PM

Quote:

Originally Posted by iminhell1

Looks fine to me. Near that 4K mark is where AFR tends to target lower, 12.2 or lower depending on tune.
But based on the trims I can tell there is still E85 in there.
And why the ignition is so choppy, I don't know. Need more data. Probably DTC kicking it.

You need to do logs with traction full off, and a solid 3rd gear, from 3K to redline would be nice.

Here goes some logs I did today

cesarortiz23 · 03-26-2018, 10:50 PM

How does these logs look to you guys ?

iminhell1 · 03-26-2018, 11:35 PM

I think everything looks really solid.
The only thing I don't know what it is is "Trims". It's a JB thing that I'm just not familiar with.
But the fueling, boost and spark stuff looks nice. AFR is trending down just like it should, Spark going up with RPM. Boost looks really solid up to redline. I bet the car feels really smooth?

cesarortiz23 · 03-27-2018, 01:50 PM

Quote:

Originally Posted by iminhell1

I think everything looks really solid.
The only thing I don't know what it is is "Trims". It's a JB thing that I'm just not familiar with.
But the fueling, boost and spark stuff looks nice. AFR is trending down just like it should, Spark going up with RPM. Boost looks really solid up to redline. I bet the car feels really smooth?

It honestly does feel smooth I'm not going to lie

my turbo seals are bad and I get a big cloud of blue smoke every now and then but the power on the car feels great

Is that normal

:

I mean the car feels good but everyone is telling me my turbos seals are done

Does that effect performance ?

03-22-2018, 01:45 AM	#1
cesarortiz23 Major 325 Rep 1,170 Posts Drives: bmw m2 lci Join Date: Feb 2014 Location: pasadena iTrader: (1)	afr question advice?? hello you guys so lately i have been putting more attention to my gauges on my phone while i drive or even wot and im noticing that my afr is at 14.5 14 around that area can anyone tell me whats a good afr my mods are catless downpipe charge pipe obviously jb4 occasionally i might run 4 gallons or so of e85 but that doesn't seem to change the afr neither it still stays at 14.5 or 14 or so.even with just regular 91 or a mix on map 5 map 1 or map 2 i still stay around the 14.5 14 area? is this good is it bad am i running way too lean??? or what are you guys recommendations thanks __________________ bmw m2
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03-22-2018, 06:40 AM	#2
Gangplank Brigadier General 1540 Rep 3,071 Posts Drives: 2011 e82 135i n55 Sport w/ DCT Join Date: Nov 2015 Location: Vero Beach, FL iTrader: (2) Garage List 2011 135i [0.00]	Let's of info available... http://bfy.tw/HFcB __________________ 2011 135i w/ DCT \| ZSP Sport Pkg \| PPK \| Ohlins R
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03-22-2018, 04:31 PM	#7
blue135 Captain 342 Rep 643 Posts Drives: 2008 135i Convertible Join Date: Aug 2015 Location: Sarasota, FL iTrader: (1)	519 - thank you. I just could not remember that Stoichiometric number.
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03-22-2018, 05:56 PM	#10
iminhell1 C2H5OH 3915 Rep 2,144 Posts Drives: 2010 SG 135i auto Join Date: May 2015 Location: Darwin, MN iTrader: (1)	You're looking at the gauge wrong / at wrong time. Post a log!
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03-22-2018, 06:18 PM	#12
cesarortiz23 Major 325 Rep 1,170 Posts Drives: bmw m2 lci Join Date: Feb 2014 Location: pasadena iTrader: (1)	Here goes some logs I did but idk if they would work or help Attached Images __________________ bmw m2
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03-22-2018, 06:32 PM	#13
iminhell1 C2H5OH 3915 Rep 2,144 Posts Drives: 2010 SG 135i auto Join Date: May 2015 Location: Darwin, MN iTrader: (1)	Looks fine to me. Near that 4K mark is where AFR tends to target lower, 12.2 or lower depending on tune. But based on the trims I can tell there is still E85 in there. And why the ignition is so choppy, I don't know. Need more data. Probably DTC kicking it. You need to do logs with traction full off, and a solid 3rd gear, from 3K to redline would be nice.
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03-22-2018, 09:04 PM	#15
iminhell1 C2H5OH 3915 Rep 2,144 Posts Drives: 2010 SG 135i auto Join Date: May 2015 Location: Darwin, MN iTrader: (1)	Here is one I just pulled. I'm flash only, MHD E60 map; MHD version 1.66 IJE0S v7.1 E60AT_ALP You can see it's about the same trend, near that 4K mark it starts to richen up. Attached Images
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03-26-2018, 10:50 PM	#20
cesarortiz23 Major 325 Rep 1,170 Posts Drives: bmw m2 lci Join Date: Feb 2014 Location: pasadena iTrader: (1)	How does these logs look to you guys ? __________________ bmw m2
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03-26-2018, 11:35 PM	#21
iminhell1 C2H5OH 3915 Rep 2,144 Posts Drives: 2010 SG 135i auto Join Date: May 2015 Location: Darwin, MN iTrader: (1)	I think everything looks really solid. The only thing I don't know what it is is "Trims". It's a JB thing that I'm just not familiar with. But the fueling, boost and spark stuff looks nice. AFR is trending down just like it should, Spark going up with RPM. Boost looks really solid up to redline. I bet the car feels really smooth?
	Appreciate 0 Quote