CIS fuel head - identifying Euro vs US?

[rooked 930]

Does anyone know the sure-fire way of determining if I have a Euro or US spec CIS fuel head on my '79 930?

I read on one site that if it is black, it is Euro; else, it is US.

Done a quick search through the archives of posts, but didn't find the answer...

Cheers,

Rob

[acapella8]

Rob, I am subscirbing to this thread, as I believe I have a Euro spec CIS, but have never learned "for sure" that I do...

I can get the part number/plate from it...maybe I can post a picture.

Tom

[81 930]

Hi Rob. Welcome to the board.

A quick way to determine whether you have a Euro or US fuel distributor is to check its color. The Euro heads are cast iron and were painted black from the factory. The US heads are cast aluminum and were left bare, so they will be silver in color. However, I have seen some aluminum US spec heads that were painted black by the owners. You could always test it with a magnet. If it sticks, it's a Euro head. If it doesn't stick, it's a US head.

That being said, the best method for determining what you have is to read the Bosch part number on the front of the head. With the intercooler and air filter housing removed, you need to look on the front side of the fuel distributor above the throttle body area. You can stick your head in there if you're careful, or use a small mirror and try to read the numbers. A true Euro head will have the numbers 0 438 100 037. A US head will have the numbers 0 438 100 145. The early 3.0 Turbos had fuel distributors that were very similar to the Euro heads. They have a part number of 0 438 100 016.

Hope that helps,

[81 930]

Here's a picture that shows where to look for the part number.

[acapella8]

Thanks for the info guys, I will be checking mine when I get home and maybe even post a picture.

[rooked 930]

That figures... when I had the top apart, I didn't take a pic of the number plate. Here's a pic of mine.

Just for fun (while I have the photo's handy), below that is the reason I had to pull apart a few things in the first place... it felt like a boost leak, so started hunting and found this o-ring. The PO or PO's shop must have crunched it when refitting the IC. Surprisingly, these o-rings are cheap ($3 each) and easy to get!



Rob
'79 930

[81 930]

Yep, that's a Euro head (037).

Cheers,

[rooked 930]

Thanks for your help. Just did the magnet test - yep, it's magnetic.

From what I understand, the Euro model had slightly higher flow characteristics, right? Are there any comparisons available, or numeric stats on this fuel distributor?

Rob
'79 930