E30 Zone

Hi All,
Just looking around the net to see what MAFs people are using.
I know you can buy the miller setup but to be honest its over priced for what it is and I'm running a unichip on my setup so that can just be tweaked.
Has anyone on here used any MAFs from other models and wired them up?
I'll look through wiring diagrams and work it out but not sure what the best MAFs are to use.
I read the e36 328i is a good match and size.
Any help much appreciated

The problem you have is the way the ECU calculates load from its sensors.

The ECU program for the MAF vs the AFM is very different.

It is possible to bodge a MAF onto a M1.3 and make it work but it is never quite right.

The one on here with the most understanding of this DmcL, his website is:
http://www.ethosmotorsports.com/

Ok cheers I'll take a look.
I can't see how the miller unit is much different to a standard bmw MAF.
Its just the tuning

mincedbeef wrote:Ok cheers I'll take a look.
I can't see how the miller unit is much different to a standard bmw MAF.
Its just the tuning

the MAF isnt but since its using an ECU with plugin chip for an ECU formerly using an AFM its different

So nobody on here has used a maf from another bmw or any other

Is this for the supercharged 335?

If so go standalone. The benefits outweight the cost by a long way for your setup, it's so far from standard than I doubt the M1.3 can really be turned to get the best out of it.

I gather that Miller uses Ford Lighting pickup truck/Ford Mustang MAF units.

Yeah its for my supercharged 3.5
I'm already running a unichip so will be able to fiddle with that to get it to run properly with a maf.
Got mine running now so really want to get rid of the dodgy old afm and go for something more free flowing and less restrictive

Barn doors FTW!

The trouble is the ECU is coded for an AFM, it's not just mapped for one, the program is hard coded to work with an AFM.

The way the M1.3 calculates load vs the M3.3 (MAF) looks the same on a basic flow chart but the actual way it handles the data is quite different.
The AFM system primarily uses the AFM for the load signal which is why they are so sensitive to dirty/badly adjusted AFMs.
The M1.3 knows the AFM does not actually read the mass of the air and it is much less proportional to the airflow (part of why the M1.3 is insensitive to small throttle inputs).

The MAF system takes several inputs and turns them into a fictional load number which is then used to find the map location.
The MAF is also much more directly related to the air input a MAF reading when combined with a temp sensor can give a really true representation of the true mass of air entering the engine.

While it is possible to change the M1.3 to use values that work with a MAF in the map it still treats the data from the MAF in the same way as the data from the AFM.
Doing this way is a bit of a kludge compared to changing the ECU out for one designed for a MAF from the start.
It would be possible to change the raw code to solve this and I know some people were working towards this but it just does not make sense with the price of stand alone or that the M50NV ECU has been swapped onto the M20 successfully.

I know Miller do a MAF conversion but I don't think any of the Miller products differ significantly from the Bosch code.
If anyone had a BIN from a Miller chip I could decompile it and see if it is a code change or just different values in the map.

Basically for what your doing a piggy back and MAF tacked onto an old computer is not going to give the benefits vs cost that stand alone will give.

Go stand alone and ditch it all for a MAP based system that will compliment your turbo setup. You might be able to do VEMS or MS for the money you get for your unichip and would spend on a MAF conversion.

screech, PM speedtouch, IIRC he has a copy of the miller maf chip, he might be able to help you.

I already have a unichip on mine. I had it installed about 4 years ago so that would just need a tweak. I've found an option for the MAF.
http://www.bimmerforums.com/forum/showt ... 0-I-did-it

Does anyone know where I can get hold of the unichip tuning software as they seem to have the uk locked down so you have to go to a tuning firm that does it. Problem is there are no unichip tuners within 100 miles or so from me that will do it.
They are cheaky b*stards as I was never told when having it fitted that it won't be easy to find a tuner.
If you live in the US they will sell it to you