Quote:
Originally Posted by Kenth
I also use the vented gaskets in all but 1964-66 Pontiac end carbs.
The latest factory info calls for the closed 7015345 gasket to these.
I canīt imagine the small .030" holes in the throttle valves will pull fuel from the float chamber in any amounts or at all.
My conclusion on the holes is that they are there to pull any excess of fuel vapor residue for combustion to preven varnish build up on throttle valve edges, where other carbs with the vented gasket vents the vapors to the atmosphere.
FWIW
|
Why do you not use the vented base gaskets in the '64-'66 carbs? Is it because these end carbs have the holes in the throttle plates? Other than that, these carbs are functionally identical to the '59-'63 end carbs.
I drill the small holes in all restorations of the large end carbs, regardless of application, whether the 997 or 683 float bowls.