Zenith or PMO
 

Ive read that the PMO carbs can use the manifolds and linkage of a set of Zenith carbs and give you better performance than Zenith and Webber’s is this correct.
Am I better of getting a new pair of PMO or having my Zenith rebuilt or purchasing a set of Webber’s and having them rebuilt
Thanks Brian

I would say, from my experience, if you have a 2,2 T have the Zeniths rebuilt. They are well matched to that motor and give good performance and economy.

The only benefit of Webers or PMOs is if you increase your displacement and need larger carbs. The Webers will get worse mileage. I was never able to make Zeniths work on a larger motor, although some claim to. If you just want new, get PMOs.

There is now and third option. New Webers !!

Pierce Manifold will be importing new Webers from the factory in Spain within the next few weeks. They were passing out fliers at Rennsport.


All that said, I am currently running Zeniths on my 2.2 1970 T with good results. I rebuilt the carbs with expert oversight.

On my upcoming hot rod motor, more than likely I'll go with PMOs or the new Webers. Paul Abbott prefers the latter, but you likely knew that. ; )

Here in spain ?? :confused::confused::confused:

It's true.
http://forums.pelicanparts.com/911-engine-rebuilding-forum/1011709-new-weber-40-46-coming-soon.html

If you get new Webers, inspect them closely. I just put a brand new pair on a 356C and had all kinds of problems. Turns out there was milling bits in the float bowls and in various other passages. After a lot of disassembly and cleaning, they worked great as expected......but it was an inexplicable mess at first - car backfiring, wouldn't idle, couldn't set the screws, etc.

Bob
'75 Targa 3.0
'86 Cab

Zeniths can be made to work very well with a 3.0. Mine do.

Ran them with SC cams, DC-20/19 and now with DC-40 cams. They really like the DC-40s

But, they require a lot of modifications and may have been cheaper to do PMOs.

Modifications:
34 & 35 mm venturies
IDA transition ports
Replaceable idle air jets
Delete aux air curcuit
Custom “hammer” style belcrank for accel pump with 0.50mm accel jets
Thinned throttle shafts
New butterfly’s set to close off the lower port.
PMO intake manifolds to cover the CIS cutouts.
Plus large jets and smaller air correction jets.