Dear fellow enthusiasts

I have now removed the Weber carburettors from my Urraco P250 s from 1973.
I have read in all the information about urraco that it is equipped with 40mm IDF Webers..
We didn't find any info on the carburettors other than it is Italian webers, but compared to another IDF Weber i have the once on the urraco is smaller!! Seems like it is 38 or 36mm Webers instead of 40mm.. Why is that? Anybody know? It ceartainly looks like the carburettors have been on the car all the time.


Cheers
Daniel

Don't know if this will be of interest, but these guys offer some good basic info on the Webers as well as lots of parts/service:

http://www.inglese.com/

cheers,

jeff

Daniel,

I've been busy at work and running way behind on checking the net ... sorry for the delayed post. I pulled my carbs as well and saw they measured 36mm at the inlet and they don't look like they have a choke insert ... Can't say I understand it either, but they are definitely stamped as 40 IDFs ... The P200s used Weber 36's, but again mine are stamped differenty ...

I simply decided to clean and rebuild them (had elakage problems) and see how the car ran afterwords. Pulled them apart and confirmed all components - matched them to what is specifed in the driver's handbook. Replaced needle valves and seats w/ viton units from redline Weber, replaced all gaskets etc, set the floats, put them back together and on the car and started learning how to sync them ... Wasn't too hard and made a world of difference in the car!!! Still need to sync at the linkage level when off idle though ...

Perhaps Inglese our Pierce Manifolds here in the US could answer the question of sizing. However, we now have two sample points -yours and mine, that are stamped as 40 IDFs (I assume yours are). My gut feel (and it is just that) is they are correct.

Regards,

Bryan
'74 P250S S/N 15622
Indianapolis Indiana USA
blissinindy@yahoo.com