View single post by Jensenman
 Posted: 07-21-2012 11:28 pm
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Joined: 04-14-2005
Location: Columbia, South Carolina USA
Posts: 156
Dells (and for that matter any carb) should have an immediate 'pump shot'. This means when you look in the venturis with a light and move the throttle slowly, you should immediately see fuel from the discharge nozzle.

As a rule, if the accelerator pump is 'late' you will get a backfire along with the stumble. Since you don't mention a backfire, chances are the pumps are working normally and as mentioned venturi size is the culprit.

You can also get a stumble if the ignition advance is not coming in early enough. If you are still using the stock dizzy that came with the Strombergs and are not running the advance from 'ported vacuum' then you might bump the base timing about three degrees or so.