MAF sensor

pacific_tune · 06-21-2021, 02:25 PM

is there any option to run without it ? on N55. maybe someone have already experience with it ?thanks

n55david · 06-21-2021, 02:54 PM

Quote:

Originally Posted by pacific_tune

is there any option to run without it ? on N55. maybe someone have already experience with it ?thanks

yeah with a custom tune for it. why would you want to run without the primary air metering source?

pacific_tune · 06-30-2021, 04:31 AM

planing to replace turbo. and boost already controlled with boost controller. so what need to be done/modified in bin to make posibble run without Maf ?

n55david · 06-30-2021, 07:23 AM

Quote:

Originally Posted by pacific_tune

planing to replace turbo. and boost already controlled with boost controller. so what need to be done/modified in bin to make posibble run without Maf ?

talk ro your tuner, they will help.

mike@x-ph.com · 06-30-2021, 09:57 AM

You can run without it if your car is tuned

pacific_tune · 06-30-2021, 01:44 PM

ok. then lets start from who can do it ?

n55david · 06-30-2021, 01:47 PM

Quote:

Originally Posted by pacific_tune

ok. then lets start from who can do it ?

any of the big named tuners.

harkes · 07-01-2021, 01:46 AM

Easier just to try it instead of discussing here. After a while you will get a CEL but car will drive like normal. Nothing need changing in the .bin. MAF has nothing to do with boost control, that is your MAP and TMAP.

If you want to run aftermarket intake - unplug MAF + code out the CEL
Running factory - keep it

n55david · 07-01-2021, 07:19 AM

Quote:

Originally Posted by harkes

Easier just to try it instead of discussing here. After a while you will get a CEL but car will drive like normal. Nothing need changing in the .bin. MAF has nothing to do with boost control, that is your MAP and TMAP.

If you want to run aftermarket intake - unplug MAF + code out the CEL
Running factory - keep it

that's not the best way to do it.

thejeremyman9 · 07-01-2021, 11:31 AM

Or just do the logical thing and keep the stock intake with the MAF sensor? I would like to understand what you are trying to achieve with running without the MAF sensor.

n55david · 07-01-2021, 03:40 PM

Quote:

Originally Posted by thejeremyman9

Or just do the logical thing and keep the stock intake with the MAF sensor? I would like to understand what you are trying to achieve with running without the MAF sensor.

we are in agreement.. unless you have an intake that specifically is causing weird issues with your maf, in which case you should switch intakes... there is no reason to bypass the maf.

pacific_tune · 07-01-2021, 04:43 PM

so if i keep Maf sensor. should i keep diameter of intake tube same as stock in place where maf is located ? or if i make bigger intake i can just put in sensor without modifying calibrations in bin ? i mean when i changed map sensor some offset number needed to be changed in bin to get correct readings. is same thing needed to be done in this case ?

thejeremyman9 · 07-01-2021, 04:54 PM

Quote:

Originally Posted by pacific_tune

so if i keep Maf sensor. should i keep diameter of intake tube same as stock in place where maf is located ? or if i make bigger intake i can just put in sensor without modifying calibrations in bin ? i mean when i changed map sensor some offset number needed to be changed in bin to get correct readings. is same thing needed to be done in this case ?

The MAF housing has a specific size and shape, in addition to having a "mouth" that is designed to smooth airflow and reduce turbulence where the intake air meets the MAF sensor. All of this in the stock intake contributes to a stable and reliable MAF reading.

The map sensor is different because going from a 2.5 to 3.5 bar MAP sensor means the actual range of the sensor changes. Its still the same voltage range, but the actual pressure range is different. So if you don't calibrate this, when you read say 5v, the actual pressure the DME sees will be wrong.

It would be difficult (and no one has done it to my knowledge), to try and recalibrate a MAF sensor for a different intake. This is why some intakes throw CEL, cause rough idle, etc.

Backing up a bit, you don't even need to change the diameter of the intake tube... the stock one is fine... I can't explicitly say for a upgraded turbo application since i only tested stock turbo, but i expect any actual gains to be had by doing a larger/custom intake are negligible, especially if you run a load based tune.

https://f30.bimmerpost.com/forums/sh....php?t=1765289

n55david · 07-01-2021, 06:30 PM

Quote:

Originally Posted by pacific_tune

so if i keep Maf sensor. should i keep diameter of intake tube same as stock in place where maf is located ? or if i make bigger intake i can just put in sensor without modifying calibrations in bin ? i mean when i changed map sensor some offset number needed to be changed in bin to get correct readings. is same thing needed to be done in this case ?

you don't need to make the intake bigger unless you're running 800hp

harkes · 07-01-2021, 10:14 PM

Just remembered I have a video running MAF-less and even removing the entire intake to see what happens

FYI: Not much

pacific_tune · 07-28-2021, 05:43 PM

Quote:

Originally Posted by harkes

Easier just to try it instead of discussing here. After a while you will get a CEL but car will drive like normal. Nothing need changing in the .bin. MAF has nothing to do with boost control, that is your MAP and TMAP.

If you want to run aftermarket intake - unplug MAF + code out the CEL
Running factory - keep it

can you please point me information about how to code out cell ? thanks

n55david · 07-28-2021, 06:42 PM

Quote:

Originally Posted by pacific_tune

Quote:

Originally Posted by harkes

Easier just to try it instead of discussing here. After a while you will get a CEL but car will drive like normal. Nothing need changing in the .bin. MAF has nothing to do with boost control, that is your MAP and TMAP.

If you want to run aftermarket intake - unplug MAF + code out the CEL
Running factory - keep it

can you please point me information about how to code out cell ? thanks

contact your tuner or tuning software maker

harkes · 07-28-2021, 10:55 PM

Quote:

Originally Posted by pacific_tune

can you please point me information about how to code out cell ? thanks

Sorry, I have no idea!

If you like to experiment with home-tuning then the bootmod3 is probably the best platform with its built in function.

Bmwdoubles_ · 07-29-2021, 12:39 AM

What your looking for is called a Speed Density Tune.

pacific_tune · 07-29-2021, 02:46 AM

one more question someone tried to contact member anjuna ? i am interested it just not answering PM's or it is just in my case not get heard from him few montn ?

pacific_tune · 07-29-2021, 02:47 AM

he wrote exelent guide just seeked little help from him if possible with my build.....

Info@mad-us.com · 07-29-2021, 08:16 PM

Quote:

Originally Posted by pacific_tune

he wrote exelent guide just seeked little help from him if possible with my build.....

Do you change elevation often?

06-21-2021, 02:25 PM	#1
pacific_tune New Member 41 Rep 23 Posts Drives: f30 e70 e46 Join Date: May 2021 Location: Georgia iTrader: (0)	MAF sensor is there any option to run without it ? on N55. maybe someone have already experience with it ?thanks
	Appreciate 0 Tweet Quote

06-30-2021, 04:31 AM	#3
pacific_tune New Member 41 Rep 23 Posts Drives: f30 e70 e46 Join Date: May 2021 Location: Georgia iTrader: (0)	planing to replace turbo. and boost already controlled with boost controller. so what need to be done/modified in bin to make posibble run without Maf ?
	Appreciate 0 Quote

06-30-2021, 09:57 AM	#5
mike@x-ph.com BimmerPost Supporting Vendor 24141 Rep 190,706 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	You can run without it if your car is tuned __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
	Appreciate 0 Quote

06-30-2021, 01:44 PM	#6
pacific_tune New Member 41 Rep 23 Posts Drives: f30 e70 e46 Join Date: May 2021 Location: Georgia iTrader: (0)	ok. then lets start from who can do it ?
	Appreciate 0 Quote

07-01-2021, 01:46 AM	#8
harkes Colonel 1077 Rep 2,357 Posts Drives: M135i, E39 M5, NSX and AE86 Join Date: Apr 2014 Location: Xiamen, China iTrader: (0)	Easier just to try it instead of discussing here. After a while you will get a CEL but car will drive like normal. Nothing need changing in the .bin. MAF has nothing to do with boost control, that is your MAP and TMAP. If you want to run aftermarket intake - unplug MAF + code out the CEL Running factory - keep it __________________ M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost (A Dane in China) Last edited by harkes; 07-01-2021 at 02:06 AM..
	Appreciate 0 Quote

07-01-2021, 11:31 AM	#10
thejeremyman9 Major General 4358 Rep 7,597 Posts Drives: 2015 BMW 335i Join Date: May 2019 Location: Cali iTrader: (0)	Or just do the logical thing and keep the stock intake with the MAF sensor? I would like to understand what you are trying to achieve with running without the MAF sensor.
	Appreciate 1 harkes1077.00 Quote

07-01-2021, 04:43 PM	#12
pacific_tune New Member 41 Rep 23 Posts Drives: f30 e70 e46 Join Date: May 2021 Location: Georgia iTrader: (0)	so if i keep Maf sensor. should i keep diameter of intake tube same as stock in place where maf is located ? or if i make bigger intake i can just put in sensor without modifying calibrations in bin ? i mean when i changed map sensor some offset number needed to be changed in bin to get correct readings. is same thing needed to be done in this case ?
	Appreciate 0 Quote

07-01-2021, 10:14 PM	#15
harkes Colonel 1077 Rep 2,357 Posts Drives: M135i, E39 M5, NSX and AE86 Join Date: Apr 2014 Location: Xiamen, China iTrader: (0)	Just remembered I have a video running MAF-less and even removing the entire intake to see what happens FYI: Not much __________________ M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost (A Dane in China)
	Appreciate 0 Quote

07-29-2021, 12:39 AM	#19
Bmwdoubles_ Lieutenant 194 Rep 517 Posts Drives: BMW F10 535 Join Date: Mar 2020 Location: Los Angeles iTrader: (1) Garage List [0.00]	What your looking for is called a Speed Density Tune. __________________ BPM Tuned, Advanced Fuel Dynamics, Paddoq Valved Exhaust, Paddoq Magnetic Paddles, EDC dampers, Dinan Springs, H&R Sway. DCT all day long. https://www.youtube.com/channel/UCFu...fWjCtOz49FDMlg
	Appreciate 0 Quote

07-29-2021, 02:46 AM	#20
pacific_tune New Member 41 Rep 23 Posts Drives: f30 e70 e46 Join Date: May 2021 Location: Georgia iTrader: (0)	one more question someone tried to contact member anjuna ? i am interested it just not answering PM's or it is just in my case not get heard from him few montn ?
	Appreciate 0 Quote

07-29-2021, 02:47 AM	#21
pacific_tune New Member 41 Rep 23 Posts Drives: f30 e70 e46 Join Date: May 2021 Location: Georgia iTrader: (0)	he wrote exelent guide just seeked little help from him if possible with my build.....
	Appreciate 0 Quote