Author Topic: FEELER: Tunable MAF Conversion Interest? (Read 21739 times)

bmwconnect · « **Reply #30 on:** January 31, 2011, 10:17:08 PM »

Quote from: turbo 318;101058

well i got the miller war chip and its all bad i dont want to say anything bad just yet. but if you pm me ill tell you the whole drama im going thu right know ....

please enlighten us

bmwman91 · « **Reply #31 on:** January 31, 2011, 10:27:13 PM »

Quote from: turbo 318;101046

so what's with the maf lets make this happen ill pay you if you can make it work.

Oh, I wasn't planning on giving them away. :p It'll be competitively priced with other products of this nature.

Quote from: bmwconnect;101053

bmwman91 why not go threw the eprom code and adjust the constants for the AFM and scale for the MAF ?

I will gladly help out I just can't be testing such Ideas on customer cars due to time consuming issues, but if someone wants to be a Guinna pig I will help out the best way I can

To me is just sounds better if you stick the MAF chip in the DME and then plug the MAF in and GO!

Kind Regards|

Editing the Motronic code won't really work. It is set up to take in volumetric flow rate and air temperature, from which it computes mass flow rate. Editing the maps only lets you scale the behavior. What you would need to do to get the ECU to run a MAF properly would be edit the executable program code and remove the whole IAT / mass flow rate calculation section. THAT is something that COULD be done, but would be far more work than it is worth (unless someone is REALLY good friends with Jim Conforti & can get him to give out the annotated assembly code he came up with back when he was writing this stuff for Bosch). Chances are that he isn't about to do that though!

bmwconnect · « **Reply #32 on:** February 01, 2011, 12:14:37 AM »

Quote from: bmwman91;101065

Oh, I wasn't planning on giving them away. :p It'll be competitively priced with other products of this nature.

Editing the Motronic code won't really work. It is set up to take in volumetric flow rate and air temperature, from which it computes mass flow rate. Editing the maps only lets you scale the behavior. What you would need to do to get the ECU to run a MAF properly would be edit the executable program code and remove the whole IAT / mass flow rate calculation section. THAT is something that COULD be done, but would be far more work than it is worth (unless someone is REALLY good friends with Jim Conforti & can get him to give out the annotated assembly code he came up with back when he was writing this stuff for Bosch). Chances are that he isn't about to do that though!

I know exactly how to do the above /\ and I am more then familiar with disassembley of the code... intel 8051 8bit processors are a breeze compared to the newer stuff... If ever you want to collaborate on something let me know and I can give you hand but otherwise cool idea and best of luck

bmwman91 · « **Reply #33 on:** February 01, 2011, 12:31:42 AM »

Quote from: bmwconnect;101072

I know exactly how to do the above /\ and I am more then familiar with disassembley of the code... intel 8051 8bit processors are a breeze compared to the newer stuff... If ever you want to collaborate on something let me know and I can give you hand but otherwise cool idea and best of luck

I tried disassembling the code a few years ago. I was a lot less savvy with microcontrollers then, but it looked like a nightmare to separate the LUTs & other constants stored in with the machine code instructions. When I am done rolling out the MAF conversion, I would be interested in seeing what can be done. I have always dreamed of completely re-writing the Motronic firmware to add some features & work with other types of sensors. I have the datasheet for the M175's uC, so it isn't out of the realm of possibility.

bmwconnect · « **Reply #34 on:** February 01, 2011, 12:50:06 AM »

Quote from: bmwman91;101074

I tried disassembling the code a few years ago. I was a lot less savvy with microcontrollers then, but it looked like a nightmare to separate the LUTs & other constants stored in with the machine code instructions. When I am dont rolling out the MAF conversion, I would be interested in seeing what cab be done. I have always dreamed of completely re-writing the Motronic firmware to add some features & work with other types of sensors. I have the datasheet for the M175's uC, so it isn't out of the realm of possibility.

shoot me a email with that data sheet and I will send you back a pdf file you have never seen before

nomade30 · « **Reply #35 on:** February 01, 2011, 01:49:52 AM »

Come on guys, share the information. I have been to many local meets with Jim C and he won't share any of the information either.

I'm interested in the MAF kit, but I wouldn't be able to get it for a couple months.

bmwconnect · « **Reply #36 on:** February 01, 2011, 09:35:40 AM »

Quote from: nomade30;101080

Come on guys, share the information. I have been to many local meets with Jim C and he won't share any of the information either.

I'm interested in the MAF kit, but I wouldn't be able to get it for a couple months.

If I share the information you will need to be busy for the next 5 years

turbo 318 · « **Reply #37 on:** February 01, 2011, 10:29:52 PM »

bmwconnect · « **Reply #38 on:** February 01, 2011, 11:50:48 PM »

Quote from: turbo 318;101098

You are the man thanks for helping me with the problem on my miller war chip ews decoding ....if it wasnt for you i wouldn't no know what to do !!!!

no problem glad to hear you got it working

nomade30 · « **Reply #39 on:** February 02, 2011, 12:02:44 AM »

Quote from: bmwconnect;101083

If I share the information you will need to be busy for the next 5 years

I don't understand what you mean by this.

bmwman91 · « **Reply #40 on:** February 04, 2011, 11:45:18 AM »

Sorry I haven't updated in a little while, my "real" job and life have been hectic. Work is still going on this, and I am hoping to finish testing all the boot-loader stuff this weekend. From there, I need to work out the tuning section. At this point, I WILL make it possible to use different MAFs. As I get parameters for new sensors, I will be able to release MAF data files that can be imported into the GUI and then loaded onto the converter.

Thereafter, I will finish up the firmware for the converter's controller. THat will probably take a week or two. Luckily, I already have the main portion of the code written. I just need to add in the interface stuff for tuning.

Finally, I will need to actually BUILD this. The hardest part will be sourcing molded cable strain reliefs and finding an appropriate enclosure for this. I have a few leads on companies that do this sort of thing for small-medium volume products. This is all being funded personally, which makes things a little trickier. If anyone knows of a good source of reasonably priced multi-conductor cable, strain reliefs & small water-tight enclosures let me know!

Thanks!

nomade30 · « **Reply #41 on:** February 09, 2011, 01:56:30 AM »

I would like to update you too, I will probably be your first customer, I have ran into some money and I really would like to fix that little 1-2 second delay in throttle response, causes me to slip my clutch a lot uphills.

bmwman91 · « **Reply #42 on:** February 09, 2011, 11:17:50 AM »

Haha thanks!

If you have a 1-2 second delay in response though, I think there are other things awry with the car!

nomade30 · « **Reply #43 on:** February 09, 2011, 05:17:35 PM »

Quote from: bmwman91;101285

Haha thanks!

If you have a 1-2 second delay in response though, I think there are other things awry with the car!

I'm pretty sure it's my ugly AFM that I refuse to clean because it's a piece. The response is fine once I'm off idle.

bmwman91 · « **Reply #44 on:** February 10, 2011, 11:26:46 PM »

Just a teaser...I have been making good progress this week.