carbs ... can you id these?

[bimmerboy73]

anyone know what type of carb this is?


http://s257.photobucket.com/albums/hh225/rysejones/?action=view&current=Weber-2.jpg



http://s257.photobucket.com/albums/hh225/rysejones/?action=view&current=Weber-3.jpg

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want to look into purchasing a rebuild kit but not sure exactly which one to get.

Also, forgive the ignorance of new coupe guy, but is there list of what the various carb types are (what the abbreviations mean... INAT, DCOE). From what i've gathered, the dcoe variety are the type that typically are mounted to the side of the block... and INAT from a manifold that pulls air from above... and thats about all i've got...



Thanks in advance

 

[bert35csi]

These were the Weber dual downdraft carburettors that were modified by a Monterey, CA company named Jam Engineering. These carbs were modified and tweaked by Jam Eng. to meet the super strict emissions regulations in California back in the 1980's and the 1990's. They were pretty well known and respected company with the coupe community back then. I was considering their carb kits back in the late 80's when I purchased my first 3.0 CS. Well, I just did a google on Jam, and they are still doing business and still in the same 'Steinbeck' country.

Bert
72 3.5 CSi
88 M6

 

[shanon]

Downdraft Webers , either a 32/36 DGAV (a progressive carb) or a 38/38DGES (syncornized carb) w/ a the JAM adapter plate for the stock air cleaner, as Bert said, JAM is still in business in the Monterey, area.

Look for a stamped ID at the base of the carb where it mates to the intake mainfold.

My brothers have paid JAM a visit and they told me that they saw a M30 there often used as a test mule for various carb set-ups. Google JAM engineering for some more info and cool pics.

HTH
-shanon

 

[m_thompson]

I have those carbs on my '72 3.0CS.

I had lots of problems with Zeniths, spent lots of time and money on them, never got them to work 100%.

The JAM kit is easy to install, requires a little modification to the intake manifolds to clear the throttles, and requires two holes to be drilled in the stock air filter.

The throttle linkage is tricky to adjust. It is easy to set up so that it will go over-center and jamb open.

The Zeniths have vacuum operated secondary throttles, so the pedal push is constant through the whole range. The DGAVs have mechanical secondaries, so the pedal gets difficult to push about half way down. Fortunately this equates to about 70 MPH so it works as a cruise control.