how to increase fuel output with weber carbs
 

I have a 1970 911t 2.2 with s pistons and e cams and Weber carbs and its hesitating under hard acceleration. I am checking multiple options including measuring the fuel output which is sitting at about 0.50cc. The factory shop manual recommends up to 0.80 for s engines and 0.50 for t's. I would like to increase closer to 0.80 however I can't find any way to adjust. The zenith have a screw for adjusting but the webers dont have this.

Any ideas?

Dan, The Accel pump connects to the center shaft via a linkage. Which accelerator pump linkage do you have? There were two types. One is a straight linkage and one had a nut and threaded linkage to set the overall travel.

If adjustable you can set the linkage. Otherwise, you have to install larger jets in the accel pump squirters on top of the carb base.

Thanks Jamie. Mine does not have a nut for adjusting. Is there any way to update to change the linkage vs. Replacing the jets?

Also what would be the jet size for an s config?