B58 Tuning and Fueling Discussion

G.Newt · 05-06-2022, 03:17 AM

Quote:

Originally Posted by E90ROXS

Quote:

Originally Posted by G.Newt

The log sure looks like a boost leak. You never hit target boost and your WGDC is 90-99% at only 15 psi. Your load actual is a decent amount less than target load as well.
Your WGDC also oscillates up and down, almost mimicking throttle closure. Something isn't right.

Your smoke test came up with nothing? Hmmm

I did a smoke test on the intake pipe down to the turbo and charge pipe. I also plugged it directly to the intake manifold. I didn’t anything. The regulator on the smoke test regulates at 1 psi. Maybe I need to bring the car to a shop for them to test it with a higher psi tester. By the way I recently changed new o2 sensors, plugs, coils and injectors. So those are out of the question.

Throw the whole car away, Alan 😂

IMS-340C · 05-06-2022, 03:18 AM

On initial acceleration you are correct but on steady cruising I think they should be closer.

Anyway was linking it to the weird wastegate parameters, the logs also shows DME not requesting those boost fluctuations from FPFP actual and required.

Quote:

Originally Posted by G.Newt

That's normal, at least from my half-throttle BM3 logs. They show throttle angle at 95-99 with 40-50% throttle. Do you have a half-throttle log where throttle angle matches?

https://www.bootmod3.net/log?id=61ba...90c665b9ebcb45

IMS-340C · 05-06-2022, 03:20 AM

No don't buy the OTS maps unless you find them useful, you can try the stock tune.

Quote:

Originally Posted by E90ROXS

Yeah I was thinking of this. Will have to buy the maps.

E90ROXS · 05-06-2022, 03:50 AM

Quote:

Originally Posted by G.Newt

Throw the whole car away, Alan 😂

What did I do to deserve this?

IMS-340C · 05-07-2022, 08:01 AM

You really made me doubt it

my tune with MPPSK throttle mapping.

https://datazap.me/u/ims/throttle?log=0&data=2-20-24

Quote:

Originally Posted by G.Newt

That's normal, at least from my half-throttle BM3 logs. They show throttle angle at 95-99 with 40-50% throttle. Do you have a half-throttle log where throttle angle matches?

https://www.bootmod3.net/log?id=61ba...90c665b9ebcb45

dinan5m3 · 05-09-2022, 02:01 PM

Well, i should be reading the manual little more closely...

Found this writing. This does put me at some what of ease from paranoid of using Ethanol >E10, due to what i've been reading about (possible) corrosions...

E25'ish it is (for additional help with timing as already discussed)!

G.Newt · 05-09-2022, 02:46 PM

Quote:

Originally Posted by dinan5m3

Well, i should be reading the manual little more closely...

Found this writing. This does put me at some what of ease from paranoid of using Ethanol >E10, due to what i've been reading about (possible) corrosions...

E25'ish it is (for additional help with timing as already discussed)!

Bruh, we have modern cars. Ethanol corrosion is not a problem. A lot of us are running E40-E60. Some even have full E85 setups.

Skyhigh · 05-09-2022, 02:52 PM

"Modern" has little to do with it. There are very few countries in the world still using Ethanol fuels (>10% that is) as pump gas. E85 is gone in most.

G.Newt · 05-09-2022, 03:40 PM

Quote:

Originally Posted by Skyhigh

"Modern" has little to do with it. There are very few countries in the world still using Ethanol fuels (>10% that is) as pump gas. E85 is gone in most.

In the US, it's been a federal law since 1994 for cars to be ethanol compatible. There could be manufacturing differences for the different markets, but I doubt BMW is doing that. And the law was put in place so long ago, I suspect most (major) manufacturers have E85 compatible engines now. My "modern" still stands.

Skyhigh · 05-09-2022, 05:29 PM

Please provide definition of "ethanol compatible"? There is quite a difference between E10 compatible and E25+ compatible.
I suspect such requirements exist everywhere, but again - down to definition of "ethanol compatible".
Besides that - you said it yourself - a requirement from 1994 doesn't exactly represent „modern" in today's world of electrically driven toys

For info - although in iDrive my BMW's user guide also states 25% as above, my (VIN specific) mobile app user guide still refers to compatibility with fuels "with maximum 10% Ethanol, i.e. E10"

Maximum Ethanol content which can be found in pump gas in my country is 5%. In other European countries - 10%.
That's just to put everything into context. But I am also glad our cars seem to tolerate at least 25%, officially. Although I have no easy access to it.

E90ROXS · 05-09-2022, 08:46 PM

Quote:

Originally Posted by IMS-340C

You could try an OTS map and check if the problem disappear.

Here are 2 logs for the stock tune with pi disabled. I don’t see much fluctuations in boost. Please let me know what you think.

Stock tune Log 1
https://datazap.me/u/alanle/stock-tune-e13?log=0&data=3-24

Stock tune log 2
https://datazap.me/u/alanle/stock-tune-2-e13?log=0&data=3-24

Pi tune (boost fluctuating)
https://datazap.me/u/alanle/david-reflex-v24-mhd-flexfuel-rev11-e13-auto-pull-boost-spike?log=0&data=3-24

IMS-340C · 05-10-2022, 02:48 AM

That's why I wanted you to test a higher boost tune to confirm.

From your WOT log it doesn't look like you have any boost leak.

I think throttle/compressor power mapping should be improved, do you feel the boost fluctuations ?

Quote:

Originally Posted by E90ROXS

Here are 2 logs for the stock tune with pi disabled. I don’t see much fluctuations in boost. Please let me know what you think.

Stock tune Log 1
https://datazap.me/u/alanle/stock-tu...og=0&data=3-24

Stock tune log 2
https://datazap.me/u/alanle/stock-tu...og=0&data=3-24

Pi tune (boost fluctuating)
https://datazap.me/u/alanle/david-re...og=0&data=3-24

IMS-340C · 05-10-2022, 05:49 AM

It's not just corrosion, Ethanol has totally different AFR than gasoline.

It also means OEM tunes can trim AFR up to E25.

Quote:

Originally Posted by dinan5m3

Well, i should be reading the manual little more closely...

Found this writing. This does put me at some what of ease from paranoid of using Ethanol >E10, due to what i've been reading about (possible) corrosions...

E25'ish it is (for additional help with timing as already discussed)!

E90ROXS · 05-10-2022, 12:06 PM

Quote:

Originally Posted by IMS-340C

That's why I wanted you to test a higher boost tune to confirm.

From your WOT log it doesn't look like you have any boost leak.

I think throttle/compressor power mapping should be improved, do you feel the boost fluctuations ?

Car runs smooth on stock tune. This problem started when I lowered ethanol level down to E10. I’ll mix e50 again to confirm.

IMS-340C · 05-10-2022, 02:03 PM

One of the worst sounds to hear, stock HPFP crashing on E20 and 19 psi boost

https://datazap.me/u/ims/hpfp?log=1&...-20&zoom=49-84

IMS-340C · 05-12-2022, 02:04 PM

My tune progress increased Ethanol to E20 mixed with 87 oct and increased boost to 18.5 psi.

Wanted to increase boost further but fuel pressure very low don't know why ?

https://datazap.me/u/ims/ims-ms-new?log=0&data=4-20

IMS-340C · 05-15-2022, 02:55 PM

My tune X3 M40i gen1 vs stock X3 M40i gen2

WrxToBeamerGuy · 05-28-2022, 11:32 PM

Car keeps getting 120308 low boost pressure code. Here is a log where it goes into limp mode and throws the code.

https://www.bootmod3.net/log?id=6292...729b449f9b2d29

There is a decent boost pressure deviation right before it happens could that be tune related? Right around .040 time stamp.

IMS-340C · 05-29-2022, 02:36 AM

Whenever you're having a problem always take the tune out of the equation, run an OTS or stock tune and see if the problem still exist.

Quote:

Originally Posted by WrxToBeamerGuy

Car keeps getting 120308 low boost pressure code. Here is a log where it goes into limp mode and throws the code.

https://www.bootmod3.net/log?id=6292...729b449f9b2d29

There is a decent boost pressure deviation right before it happens could that be tune related? Right around .040 time stamp.

WrxToBeamerGuy · 05-29-2022, 11:14 AM

Quote:

Originally Posted by IMS-340C

Whenever you're having a problem always take the tune out of the equation, run an OTS or stock tune and see if the problem still exist.

I agree except I have 45 percent ethanol in my tank and I have a pure850 turbo installed.

IMS-340C · 05-29-2022, 12:34 PM

No worries about the turbo but try reducing Ethanol to E25 and test an OTS or stock, take a log then fill it again to E45.

Quote:

Originally Posted by WrxToBeamerGuy

I agree except I have 45 percent ethanol in my tank and I have a pure850 turbo installed.

WrxToBeamerGuy · 05-29-2022, 12:45 PM

Quote:

Originally Posted by IMS-340C

No worries about the turbo but try reducing Ethanol to E25 and test an OTS or stock, take a log then fill it again to E45.

Appreciate it. Yeah I'll have to run my tank close to empty then.

05-09-2022, 02:01 PM	#116
dinan5m3 Colonel 4488 Rep 2,112 Posts Drives: e39 m5 e46 m3 g01 x3m40i Join Date: Feb 2019 Location: RTP NC iTrader: (0)	Well, i should be reading the manual little more closely... Found this writing. This does put me at some what of ease from paranoid of using Ethanol >E10, due to what i've been reading about (possible) corrosions... E25'ish it is (for additional help with timing as already discussed)!
	Appreciate 1 ocdx30.00 Quote

05-09-2022, 02:52 PM	#118
Skyhigh Brigadier General 1977 Rep 3,996 Posts Drives: BMW F36 Join Date: Apr 2018 Location: Europe iTrader: (0)	"Modern" has little to do with it. There are very few countries in the world still using Ethanol fuels (>10% that is) as pump gas. E85 is gone in most. __________________ "Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
	Appreciate 1 dinan5m34488.00 Quote

05-09-2022, 05:29 PM	#120
Skyhigh Brigadier General 1977 Rep 3,996 Posts Drives: BMW F36 Join Date: Apr 2018 Location: Europe iTrader: (0)	Please provide definition of "ethanol compatible"? There is quite a difference between E10 compatible and E25+ compatible. I suspect such requirements exist everywhere, but again - down to definition of "ethanol compatible". Besides that - you said it yourself - a requirement from 1994 doesn't exactly represent „modern" in today's world of electrically driven toys For info - although in iDrive my BMW's user guide also states 25% as above, my (VIN specific) mobile app user guide still refers to compatibility with fuels "with maximum 10% Ethanol, i.e. E10" Maximum Ethanol content which can be found in pump gas in my country is 5%. In other European countries - 10%. That's just to put everything into context. But I am also glad our cars seem to tolerate at least 25%, officially. Although I have no easy access to it. __________________ "Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
	Appreciate 0 Quote

05-10-2022, 02:03 PM	#125
IMS-340C Major 455 Rep 1,181 Posts Drives: Self Tuned 340i 8AT RWD Join Date: May 2018 Location: Cairo iTrader: (0)	One of the worst sounds to hear, stock HPFP crashing on E20 and 19 psi boost https://datazap.me/u/ims/hpfp?log=1&...-20&zoom=49-84 __________________ 2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - TU HPFP Tunes: Self Tuned via MHD - Fuel: E18/92RON/87OCT https://datazap.me/u/ims/e20max?log=0&data=4-19-29
	Appreciate 0 Quote

05-12-2022, 02:04 PM	#126
IMS-340C Major 455 Rep 1,181 Posts Drives: Self Tuned 340i 8AT RWD Join Date: May 2018 Location: Cairo iTrader: (0)	My tune progress increased Ethanol to E20 mixed with 87 oct and increased boost to 18.5 psi. Wanted to increase boost further but fuel pressure very low don't know why ? https://datazap.me/u/ims/ims-ms-new?log=0&data=4-20 __________________ 2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - TU HPFP Tunes: Self Tuned via MHD - Fuel: E18/92RON/87OCT https://datazap.me/u/ims/e20max?log=0&data=4-19-29
	Appreciate 0 Quote

05-15-2022, 02:55 PM	#127
IMS-340C Major 455 Rep 1,181 Posts Drives: Self Tuned 340i 8AT RWD Join Date: May 2018 Location: Cairo iTrader: (0)	My tune X3 M40i gen1 vs stock X3 M40i gen2 __________________ 2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - TU HPFP Tunes: Self Tuned via MHD - Fuel: E18/92RON/87OCT https://datazap.me/u/ims/e20max?log=0&data=4-19-29
	Appreciate 0 Quote

05-28-2022, 11:32 PM	#128
WrxToBeamerGuy Captain 518 Rep 971 Posts Drives: 2021 Toyota Supra Join Date: Dec 2019 Location: Utah iTrader: (0)	Car keeps getting 120308 low boost pressure code. Here is a log where it goes into limp mode and throws the code. https://www.bootmod3.net/log?id=6292...729b449f9b2d29 There is a decent boost pressure deviation right before it happens could that be tune related? Right around .040 time stamp.
	Appreciate 0 Quote