928newb

I have read somewhere that 928`s can be equipped with a BMW m5 MAF.
Unfortunately, I can not find that information anymore.
Is this true or just FUD?

Rob Edwards

True-



Bosch MAF for 85-95 928 is 0 280 214 001, superceeded by 0 986 280 124. Porsche part # is 928 606 141 00

This cross references to:

BMW 13 62 1 311 950 , which is for '91-93 E34 M5 3.6 with cats
BMW 13 62 1 715 888, M5 without cats
VW (VOLKSWAGEN) 035 133 471 AC - '85 Audi 20-valve Turbo quattro.

danglerb

Last I checked it did not reduce the cost. ;(

928newb

OK thank you Rob...

do you know if there are sender unis (without the tube) out there with the same type of connector and specs?

Rob Edwards

Well, yes, but only if you own a Sawzall....

PorKen

M5 S38 airbox, with our MAF.

FredR

I seem to remember that quite a few years ago the "cheaper" route to a new MAF was via a Volkswagen fitment- doubtess no longer available.

I undertand the MAF unit on the 996 series used to run at about $140- often wondered whether such could be modified to work on a 928 with a little bit of electrical trickery.

Regards

Fred

PorKen

Wouldn't there be less dust using a voltage based (Ford) cartridge MAF?

I have 'heard' that the voltage graph is not too different.


Couple tweaks to the tables (MAF ideal, etc.), maybe a threshold change or two, in code.

hans14914

Making a different MAF work with a 928 isnt too difficult. Just need the transfer function of both MAFs and a device to level match.

Something like the Abaco MAF would work if it passed voltage over 5v. Most of the translators on the market have a 5v cap, and the 928 needs to see over 6v in some cases. Something with a range of 0-7.5v would be ideal.

I have looked into it before, not a difficult project.

Rob Edwards

Ken, the pic I posted is from 2003, it was Mark A's prehistoric version of a "Super-MAF"- regular MAF guts in a larger housing, to feed the intakes on the CF intake. The MAF was down in front of the radiator, in the airflow:






When we did some Sharktuning on Mark's racer in 2010, the car was idling on Greg's dyno, and Greg turned on one of the cooling fans into the Zombie's front grille. Snuffed the car out like a candle, it was amusing.

928newb

What exactly is this? Please elaborate.

Rob Edwards

I should apologize, I was making a bit of a joke. That's actually a stock 928 MAF that has been sawed open so that the hot wire assembly and electronics box could be installed in a larger housing, for a race car with a stroker engine.

Not sure what Ford MAF cartridge Ken is alluding to, but unless you're a a bit of an electronics guru, at this point in 2014 I don't think that there's a plug-and-play MAF alternative to the Bosch 0 986 280 124. And in today's market they're no cheaper if you pretend you have an M5 or a 20V Audi.

If you have a bad MAF and are looking for the most cost-effective solution, that solution is to either have your MAF rebuilt (there are several vendors that serve the 928 community for this) or exchange it for an already rebuilt MAF, like so:

http://www.mailordercentral.com/928i...606%20141%20LX