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Juho · 05-15-2021, 02:52 AM

Useful links related to lean burn:

Lean burn mode rules 70+mpg
https://ecomodder.com/forum/showthre...8mpg-9801.html

Lean Burn Success
https://ecomodder.com/forum/showthre...ess-36110.html

lean burn tuning ideas
https://ecomodder.com/forum/showthre...s-33565-2.html

E85 tuning, Subaru:
E85 Freeway fuel efficiency (300-400 miles per tankful)
https://www.romraider.com/forum/view...p?f=15&t=10725

____________________________

Increasing engine operating temp to increase MPG
https://ecomodder.com/forum/showthre...g-37356-2.html

BMW N43, N45 and N46 engines atleast are running on 105 to 112C coolant temperatures.
112C being an "eco mode", while the temperature will drop to 95C when going high load.

So it's very possible to run without major issues at higher temperatures.

I could possibly try at some point +100C coolant temperatures, if the thermostat just allows it.
Because the M52TU engine already has a MLS head gasket, and I'm running on E85 so knocking is not an issue = safer to go further than on gasoline.. within limits of course.

I checked yesterday my injectors, while doing other service (oil change).
They were very dirty and probably that was the cause of random missfiring at cold start (not getting enough fuel).. should replace my fuel filter, and maybe the injectors too.. I did attempt cleaning them properly, but failed to pressurize the fuel rail with injector cleaning fluid (whatever it really is).. so only cleaned them outside.

If there is too much difference on the injectors flow, I cannot get any accurate enough lambda readings (since it's only average of 3 cylinders) and probably getting random missfiring what may not be noticeable other than worse fuel economy and power output. Just another problem to be fixed.

05-15-2021, 02:52 AM	#40 (permalink)
Juho EcoModding Lurker Join Date: Apr 2021 Location: Finland Posts: 29 Thanks: 3 Thanked 6 Times in 5 Posts	Useful links related to lean burn: Lean burn mode rules 70+mpg https://ecomodder.com/forum/showthre...8mpg-9801.html Lean Burn Success https://ecomodder.com/forum/showthre...ess-36110.html lean burn tuning ideas https://ecomodder.com/forum/showthre...s-33565-2.html E85 tuning, Subaru: E85 Freeway fuel efficiency (300-400 miles per tankful) https://www.romraider.com/forum/view...p?f=15&t=10725 ____________________________ Increasing engine operating temp to increase MPG https://ecomodder.com/forum/showthre...g-37356-2.html BMW N43, N45 and N46 engines atleast are running on 105 to 112C coolant temperatures. 112C being an "eco mode", while the temperature will drop to 95C when going high load. So it's very possible to run without major issues at higher temperatures. I could possibly try at some point +100C coolant temperatures, if the thermostat just allows it. Because the M52TU engine already has a MLS head gasket, and I'm running on E85 so knocking is not an issue = safer to go further than on gasoline.. within limits of course. I checked yesterday my injectors, while doing other service (oil change). They were very dirty and probably that was the cause of random missfiring at cold start (not getting enough fuel).. should replace my fuel filter, and maybe the injectors too.. I did attempt cleaning them properly, but failed to pressurize the fuel rail with injector cleaning fluid (whatever it really is).. so only cleaned them outside. If there is too much difference on the injectors flow, I cannot get any accurate enough lambda readings (since it's only average of 3 cylinders) and probably getting random missfiring what may not be noticeable other than worse fuel economy and power output. Just another problem to be fixed.