Weber info

[NZVW]

I have a pair of Weber Carbs.

The details are
40 IDA 3C1 # 4542
and
40 IDA 3C # 4561.

Can anyone inform me of what year and or model these would have come off ???

Thanks in advance.

[John912]

See table below, although S applications with asterisks next to them look suspicious

Taken from intereurope workshop manual 187

[mfitton]

Here is some info I had:

Weber Carbs
Porsche used the IDA type carburetors on production 911's and 914/6's; the following is a listing of those used by type and model application.

40IDT3C and 40IDT3C1
•1968 911T (non-USA)
40IDA3C and 40IDA3C1
•1966 - 67 911
•1968 911L (non-USA)
40IDS3C and 40IDS3C1
•1967 - 68 911S
40IDAP3C and 40IDAP3C1
•1968 911 & 911L (USA)
40IDTP3C and 40IDTP3C1
•1969 911T
•1971 only 2.2 911T (non-USA)
40IDTP13C and 40IDTP13C1
•1970 - 71 914/6
Although Webers were not used on production Porsches after 1971 they were available as an after-market replacement for mechanical fuel injected, Solex and Zenith carbureted engines. These were frequently provided for years from Italy Spain or from the USA in later years. All the after-market Webers (not sold through Porsche service centers) were identified as type 40 IDA 3C or 3C1 carburetors and used date codes in lieu of serial numbers used for production Porsches.