Luftfilter difference between NZ/IZH?

[Paul]

Hello everyone, quick question.

How do you tell the difference from a NZ-1 air filter and the IZH post war model? Are there any characteristics that tell them apart?

Danke,

[Frank]

Hi Paul,

This is a problem, because most of the russian filters are sold as DKW NZ filters, I think 90% of the filters sold on German ebay are IZH-49 filters.

Please check Maciek:s images of a DKW filter: http://piotreksp.vip.interia.pl/NZ%201944%20parts.html

I am not sure about the differences between NZ filter and the first IZH-350 filter, but I have a russian IZH-49 filter and there are some differences I have found between Macieks filter and my IZH-49 filter.

-The "hat" of the filter is welded together on DKW and pressed on IZH 49.
-There is no hole with the small screen on IZH-49.
-The support weldings from the middle tube to the "side towers" looks different on IZH-49.

Here is a IZH-49 filter: http://www.ebay.de/itm/Luftfilter-passe ... 43aaa901a4

And this looks very much like a DKW filter: http://www.ebay.de/itm/DKW-NZ350-1-orig ... 27bfccc97a

// Frank

P.S Paul, the filter on ebay in the States is 100% russian: http://www.ebay.com/itm/1930-40-Vintage ... 35b67d175f

[iz350]

-There is no hole with the small screen on IZH-49.

Actualy IZH-49 filters up to year 1953 have that too.

[Frank]

Then its seems that the russian filter i have is post 1953, because there is no hole with screen.

Can you tell about the differences between a NZ and a IZH-350 filter, or are there any differences?

[iz350]

Can you tell about the differences between a NZ and a IZH-350 filter, or are there any differences?

IZH-350 filter is like older NZ ones(no cyclone type, but mesh).

[Frank]

Ok, thanks for the info. Do you have any images of the oldest type of IZH-49 filters (with hole), so it could be possible to see how the seam on the hat looks like and how the weldings are done.

[martdapp]

The differences are realy small;
At first, NZ-filters never were painted black, otherwise there should be grey, beige or late green paint beneeth a (during postwar) black repainted filter.
The NZ-filter is stamped like SKK or something like that.
The top of the filter was welded or in one piece, so no welding but flat.

The early IZH-filter was in fact the same as the NZ-filter, but without the stamp.
Later IZH filters had no extra little hole and still later even no springs for the 2 inner lids,
the top was pressed together and not welded as before.

Tip; this site has a search-function in wich many earlier givven commentar and answers could be found.
Martin

[Frank]

Hmmmm... Interesting... Why did the russians not use the Zyklon filter from the beginning with the IZH-350, what was the reason to switch back to the older mesh filter and then many years later they started to use the zyklon?? Did they not trust in the construction or?????

[martdapp]

Hi,
Perhaps they thought it would be good enough, it was easier to produce also.
But Russian Toendra's and Steps are dusty, perhaps that's why they came back to the Zyklon-filter. Remain; they allready had the old DKW maschines to produce them. The whole DKW plant was picked-up and thrown away a 1000 km eastwarts.
In the beginning almost all parts came from the same maschines as from DKW before. Even in the late 50th the motorparts came from this maschines.
I see the ISH as further development from the DKW NZ 350-1 and certain not as a cheap cloon ! The Russians made these "NZ's" very succesfull on masse.
A proof and chapeaux to the "father" the NZ-1.
We should be thankfull that it happened that way, therefor many NZ's can hit the road now.