75ZT Community

[Russ]

Many thanks to Jon for finding this article, it confirms what I've been suspecting.

www.bmwland.co.uk/talker/viewtopic.php?t=74830

It appears that the earlier models of Pierburg maf were not totally compatable with our cars at the time they offered a cheaper alternative to the Bosch maf but were out of spec above 3000 revs.

This seems to confirm my findings on Jon's car when looking at the maf airflow figures on T4 .

The new range of Pierburg it seems are specifically designed to go with BMW engines including ours, and are a more direct replacement.

Good prices on there too will have to look into this further me thinks.

Russ

[MrB]

Looks promising Russ.

[James.uk]

Interesting stuff Russ. Does the old PB work OK on some cars because it's linked up to a synergy2? Or is it still running "off" due to not sending temp info to the ECU ?

I have in front of me, the PB MAF that I bought with my Synergy2 (from Greeners) it has a pin head sized bump on it near the flange and on the op side to the ribs. Next to the bump it reads:- i2s. Germany...7.22684.07 On the ribbed side it reads:- >PBT GF 30< so I think it's rather an old one. .

My car is deff running better with the MAF off = tuner 3.. rather than MAF 2 = tuner 6.. With less soot and slightly better MPG.. But I have a Bosch MAF at the moment that was in the car when I bought it. .. Keith had to drill a hole in the air feed pipe on my car to insert the Synergy2 temp wire into (last year) as I thought it was external and had it fixed it to the bulkhead originally. D'ohh.. But there was no noticeable diff from driving it coming back.
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[Raistlin]

Ooops.

I think my MAF is an older model Yes the car seems to run OK with the Synergy.

[MrB]

Have read this again.

Am I right in thinking that with this newer PB MAF you wouldn't need one of Ron's MAFAMs??

Which PB MAF is Ron supplying currently?

[jonjon77]

thanks for putting the link up russ l havent a bloody clue how to do that sort of thing .
the numbers james has posted up are the same that are on my pierburg maf which is an early one.

[Russ]

Have read this again.

Am I right in thinking that with this newer PB MAF you wouldn't need one of Ron's MAFAMs??

Which PB MAF is Ron supplying currently?

The way I read it according to the fitment list the new Pierburg 7.22684.09.0 model is a direct replacement for the Bosch maf.

If this is the case a Mafam would not be required.

Really I think the only way to be sure would be to test one.

Russ

[James.uk]

Ideally, the "test pilot" would need access to a T4 and a certain amount of expertise re our cars.. Hmmm, anyone come to mind Russ?
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[jonjon77]

if my maf needed replacing l would gladly be the test pilot to try the new pierburg but some how james l dont think we will have to wait long before someones maf needs replacing

[MrB]

For a start not sure what state mine is in.....

[loz1971]

Here's the link to the company the chap on BMWland used:

http://www.airmassmeters.com/

Sounds like this could be a step in the right direction regarding MAF's (possibly)