Hi, does anybody know if Zeniths ever came stock on 914/6? My buddy acquired an old 6 motor that came with Zeniths on it and they look like they've been there a long time.

thanks Joe

Webers were stock

Sounds like an early 911 engine that originally came with Zenith's and not related to 914-6 Weber applications.. Others with alot more info will clarify..

Agree with Mark / the set of triples I now have for my 6 build match the original 914-6 build..

According to Bruce Anderson, 911E in 1970/71 had Zenith 40 TIN's,
seems to be only applications

I thought 70-71 911E had FI and the 911T had the budget Zenith carbs. I have a set of Zeniths would the part numbers on them give a clue what they came from?

Brett

Sorry: ALL 911E's, 1969 - 1973, came from the factory with Mechanical Fuel Injection (MFI. "E" for Einspritzung.)

As Bretth said: Zeniths were a 911T, 1969 - 1972/1973 (?) application.

- MR

All I can say is DONT DO IT!!

I've had zenith carb....and they are the worst thing Ever!!
Unless you like working on carbs all the time...

In 1970-71, the US version of the 911T (2.2ltr) had Zenith carbs. The German version had Weber 40IDT3C. The engine in question probably has Zenith carbs from a 2.2ltr engine or is a 2.2 engine. Check the serial number.
The Zeniths were trouble even when they were new; the idle circuits would stop up. Bolt on a set of Webers and the problem was gone.
The 1972 European 2.4T engine had Zeniths, the US version had MFI. Both engines were changed to CIS injection during the 72 or 73 model year.

CIS came in 1973.
The switch came to be known as 1973 and a half.

My '71 Targa has Zenith's and they run great, if you are having problems with them then you have someone working on them that don't know what they are doing. When they get dialed in right they run better than my webers on m 914-6.

zeniths on my 1970 911t 2.2l

Bruce got it wrong eh ?

I'd have to look at the book for myself before claiming that. If that is indeed what is printed, then yes - either a mistake or a misprint.

In some ways, it's surprising that the 914-6 *didn't* come with Zenith carbs, since the engine is essentially a 1969 911T.

- MR

[/quote]

I'd have to look at the book for myself before claiming that. If that is indeed what is printed, then yes - either a mistake or a misprint.

In some ways, it's surprising that the 914-6 *didn't* come with Zenith carbs, since the engine is essentially a 1969 911T.

- MR
[/quote]


Correct
no zeniths came in the US on the 914/6

zeniths came in the US on the 70-71T 911
I would have to look back at the 69T - 911, but almost positive it had webers

the 72 - 911T came with MFI
the 73 - 911T came with the CIS (small spigot 7R case one year only)
I need another one of these cases for the race car if anyone wants to let one go affordably.

I believe that the Zeniths in the US were unique to the 2.2 911T cars

The 69T we restored had Webers. So 99.9% sure.

Zeniths are OK, just there is no parts for them.
The weber IDA has parts, many parts are reproduced, big selection oversize vents and jets and main things like jets, etc., are the same as the 2 barrel IDA the bug guys use.
Not to mention that both the 2 and 3 barrel (PMO) are reproduced.

You do also have to watch for the ROW 2.4 911TV cars which came with Zeniths (vs. the 911TE with FI in the USA). My dad bought a 911 a while ago with a TV motor in it and we were a bit confused for a while. They definitely existed in '72, but I'm not totally sure about '73.

Same issues with PMO's. Nice carbs but parts only available from one place - PMO.

Paul Abbot @ Performance Oriented has been working on modifying the Zeniths. If properly set up, they should work.

What do you think came on a 69 T ?

I presumed Zeniths, since I thought all T's prior to the aforementioned 72/73 transition to MFI and then CIS/EFI used Zeniths. I'd have to look in a book to be say for sure and I'm not claiming to be an expert. Others here think Webers. There definitely were multiple 6 cylinder carb variations. For additional context: 1968 911L used Webers, too.

- MR

[quote name='Mark Henry' date='Aug 17 2016, 03:41 AM' post='2385741']
Zeniths are OK, just there is no parts for them.
The weber IDA has parts, many parts are reproduced, big selection oversize vents and jets and main things like jets, etc., are the same as the 2 barrel IDA the bug guys use.


I was able to get for mine all jets,rebuild kits,venturi's,and air bleed screws,the same supplier had throttle shafts,bushes etc,etc.
These parts have all been reproduced as with the Webers as Mark says.
These carbs have been well documented on Pelican ,the reason Porsche had Zenith/Solex make them is that there was a shortage of Webers from the factory at the time,they were known as a smog (emissions) carb hence the small stock venturis and lean idle jets.
Many have modified them to work for more performance it not that hard,I have done the upgrade on mine.
I don't think they were ever fitted to a 2.0L engine.

Webers

When I rebuilt my 914-6 engine to RS-SPEC (2.7 liter, RS P&C and S cams), I ended up doing a bunch of head work and installing Zeniths. That car ran great!

I had considered for several years to drop some coin on PMOs. I also considered installing fuel injection and air conditioning. None of that ever happened.

#378 lives in Germany now...