View Full Version : Dual Weber Carbs

05-31-2007, 08:49 PM
A friend is having trouble adjusting his Weber Carbs. He says that turning the air/fuel mixture screw on one side does absolutely nothing, whereas the other side responds.

After he gets the air/mixture correct, he'll syncronize them, but can't seem to get that far.

I know SUs pretty well. But nothing about Webers.

Can anyone help on this? Thanks

05-31-2007, 09:52 PM
Side-drafts or DGVs?

06-01-2007, 07:21 AM
sound to me like maybe one of the seal in the air mixture screw is bad. i dont want to here this becuase i have a set of 38 dcoe i Picked up a Carlisle that going on the Midget this weekend. and i have had VW with duals and hated them.

06-01-2007, 07:32 AM
I never had any problems with my dgv's once I re-jetted them.

try this: https://www.carburetion.com/Weber/adjust.htm

/bcforum/images/%%GRAEMLIN_URL%%/troll.gif https://i90.photobucket.com/albums/k270/KODANJA7/tr18.jpg

06-01-2007, 07:36 AM
If we're talking DCOE's that sounds like the ~classic~ bent spindle symptom. With a UniSyn or similar device, check/balance air draw between the two, and between the two throats of the individual units. If one side of one carb draws more than its twin, you've found a shaft that has likely been tweaked too hard. The other cause can be a bad shaft bearing seal. Hope for the seal problem. /bcforum/images/%%GRAEMLIN_URL%%/wink.gif