Alternative MAFs

[Martyn]

I was having a little rumage around on the net this eve and stubled across this... http://www.awe-tuning.com/pages/gallery/awe_rsk04/index.cfm

Now whilst 525bhp is impressive I couldnt help but notice their replacement MAF housing which eliminates the need for a Bosch element!

To quote the site....

The MAF housing uses the 2001-2002 S4 Hitachi mass air sensor through the use of an ingenious adapter plate. The kit adapts the much more reliable Hitachi sensor to the 2000 S4s, which originally come with a Bosch sensor. The adapter plate and the mass air housing are CNC machined from solid T-6061 aluminum and are anodized for long service.

Is this something worth looking into?

*Edit* After a quick google I found a link to the Hitachi MAFs....

http://www.hap.com/products/Sensors/MAFS/index.html

 

[Shock_Xe]

possibly aslong as you find one suited to a 1.8T as I tried an S4 one and all the parameters were out and car drove orrible

 

[ibizacupra]

possibly aslong as you find one suited to a 1.8T as I tried an S4 one and all the parameters were out and car drove orrible

no surprise there tho... too big a tube, signals out of step with mapping etc (too low a sensor signal on low end for resolution of sensor)

 

[ibizacupra]

I was having a little rumage around on the net this eve and stubled across this... http://www.awe-tuning.com/pages/gallery/awe_rsk04/index.cfm

Now whilst 525bhp is impressive I couldnt help but notice their replacement MAF housing which eliminates the need for a Bosch element!

To quote the site....



Is this something worth looking into?

*Edit* After a quick google I found a link to the Hitachi MAFs....

http://www.hap.com/products/Sensors/MAFS/index.html

Aside from the oversized tube (for our cars its too big), I wonder what pin outs are on a hitachi air mass sensor compared to our bosch maf's.
non dbw 1.8T's have different air mass sensor (different pin out too mind you) so I wonder if the hitachi is older style or newer style setup.

interesting lead tho there mart..

0-5v output proportional to airflow is the important bit.

 

[Martyn]

I have e-mailed Hitachi requesting some technical data on their MAFs, i'll post up a reply as soon as I get it.

Also managed to find this....

Is it any help at all?

 

[ibizacupra]

very much so mart.
also sent fax to hitachi uk this mornign for same info request
let me know what you get m8.



{edit-figure 5 looks like old non dbw air mass sensor.... }

 

[t18con]

are hitachi mafs just as fragile as bosch ones?

 

[Martyn]

Apparently not bad, that's why I thought it might be a useful find

 

[ibizacupra]

did you get any response mart? I did'nt

 

[Martyn]

Nothing yet mate.

Worth 'borrowing' one from an Audi dealer to get it on a scope?

 

[ibizacupra]

it looks in the picture like the ealrier no dbw maf shown.. so I would like to know how that MAF compares to the dbw ones vs the hitachi.
somehow!

 

[Martyn]

Just doing a bit more digging...It appears the Hitachi MAF can be found on these...

make model submodel engine

Audi All Road All 2.7T
Audi B5 S4 All All
Audi B6 A4 All V6 30v
Audi C5 A6 All 2.7T
Audi C5 A6 All V6 3.0L

Part #06C 133 471A

Quite possibly these too....

Audi A4 2.0 FSI (2002 )
Audi A4 3.0 (2000 )
Audi A4 1.8 T (2002 )
Audi A4 1.9 TDI (2000 )
Audi A4 2.0 (2000 )
Audi A4 1.8 T (2000 )
Audi A4 2.5 TDI (2001 )
Audi A4 2.5 TDI (2002 )
Audi A4 1.9 TDI (2001 )
Audi A4 1.8 T (2002 )
Audi A4 2.4 (2001 )
Audi A4 1.6 (2000 )

 

[Martyn]

This is quite interesting...

http://mywebpages.comcast.net/s4what/index_files/sheet007.htm (Piggies Table showing the scaling)

 

[ibizacupra]

do we know the pin out of the Hitachi MAF?

 

[Martyn]

Still hunting/waiting for that info Bill....

 

[Martyn]

Any good?

*Fixed the bad link*

 

[ibizacupra]

looks good marts.

 

[Forbez]

Did anything ever come of this?

 

[Martyn]

Heard nothing from Hitachi

 

[ibizacupra]

Hitachi have'nt responded to anything from me either.

Top company - NOT!