46IDA Help.

[76_rookie]

What does these # tell you? Are these 46IDA for special racing early Porsche?

They've got the vent with mesh on top.

46IDA3C/H9 and 46IDA3C1/D9

Pictures to come. Any help would be great. I wanted to see if I can use them on my 3.0 or possible sell them.

[juanbenae]

is this for a race car or a street car? if street how do you expect to pass smog with the carbs on a 76?

[1QuickS]

These were built after 1973 (approximately) and were probably sold as aftermarket carbs for individuals applications. The emulsion tube air screens were common on the earlier versions of these, later versions came with vent pipes.


The serial numbers are date codes which Weber used after Porsche stopped using carbs on their production engines; the earliest Weber 46mm carbs for Porsche built race engines had serial numbers which were totally numeric, not alpha/numeric like the date codes you have.

If they have "Made in Italy" to the right of the center bore then these are a bit more desirable than if they were not made in Italy. If not made in Italy then they were made by the Carter Carburetor Corporation in North Carolina in the good old USofA.

These are a bit large for a 3.0 unless it is a pretty strong engine.

[76_rookie]

Thanks for the info. I don't have a 76' anymore as when my screen name was created. 70 RS Clone w/ 3.0 Carrera running 40 IDA possibly switching to 46 IDA. But I am think of selling. See pictures in the for sale forum tonight.

[Grady Clay]

46IDA3C and 46IDA3C1 became available for our Porsches in 1964 (perhaps a bit earlier) with the 6-cylinder 904.
Keep in mind Weber supplied these (and others) to many auto manufacturers.
The carbs were standard fare on most 906 and 911R (exceptions being the MFI “e” versions).
These have been regularly available to Porsche racers through the ‘80s (and probably much longer that I can’t speak to).
Today, there is the other option of the PMO version, similar (with improvements).

Someone should start documenting a list of Weber model numbers & serial numbers connected to the Porsche engine numbers originally supplied.
I wish I had kept all the numbers that passed through my hands. I still have a few I can describe.

Best,
Grady

[Grady Clay]

Paul,

Why don’t you start a registry (similar to or in conjunction with (Type 901/xx Engine Build #'s) of engine numbers, Weber type number (where appropriate) and Weber serial numbers. You are the world-expert on this subject. Weber and Porsche are lame in their archival responsibility.

Best,
Grady