Hello,
Has anyone had any dealings with a Weber 34ADR Carburetor on our cars? I was looking for a 34 DMSA but no luck, and i came across this: https://www.ebay.com/itm/235193305907?c ... JxEALw_wcB
Looks a little like the 34 adf, water choke, but synchronous from the looks of the throttle linkage.
BTW the one in the ad looks like a knock off.
Thanks
Weber 34ADR Carburetor
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70spider
- Posts: 676
- Joined: Fri Mar 14, 2014 3:05 pm
- Your car is a: 1970 Fiat spider
- Location: N.E. New Mexico
Weber 34ADR Carburetor
1970 Fiat Spider 124 Sport aka "Pesto"
2002 Mazda Protege5
2013 Buddy 170i
2002 Mazda Protege5
2013 Buddy 170i
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18Fiatsandcounting
- Posts: 3799
- Joined: Fri Mar 15, 2019 11:23 pm
- Your car is a: 1969 and 1971 124 spiders
- Location: San Francisco Bay Area
Re: Weber 34ADR Carburetor
I don't have any experience with this carb, but I'm thinking it might also be too much carb for the 1438cc engine. On that small engine, you don't have a lot of airflow at low rpms, so many larger carbs struggle to get fuel flowing and atomized as it should be. As a result, the engine doesn't seem to have much power until you get to higher rpms where there is more airflow.
Could be the reason that Fiat originally used a 26/34 DHSA on these engines originally. Small primary barrel for low speed performance, but a large secondary barrel for airflow at high rpms. A good way to do things, although the pesky vacuum operated secondary can be problematic.
Another carb to consider is the 32DMSA (not the 34DMSA). Progressive, manual choke, and very small venturis for low speed driveability. I think it was used on the 124 sedans and wagons in the early 1970s, but it never appeared on the spiders.
The 34DMSA did appear on the 1800 spiders in just one year, 1974, and that's why they are somewhat hard to find.
-Bryan
Could be the reason that Fiat originally used a 26/34 DHSA on these engines originally. Small primary barrel for low speed performance, but a large secondary barrel for airflow at high rpms. A good way to do things, although the pesky vacuum operated secondary can be problematic.
Another carb to consider is the 32DMSA (not the 34DMSA). Progressive, manual choke, and very small venturis for low speed driveability. I think it was used on the 124 sedans and wagons in the early 1970s, but it never appeared on the spiders.
The 34DMSA did appear on the 1800 spiders in just one year, 1974, and that's why they are somewhat hard to find.
-Bryan