Whoops, I was wrong about the function of the bypass valve. As luck would
have it, our speaker at our Triumph Club meeting Monday night was a carb
expert, and straightened me right out.
I was also unclear about the dashpot I was referring to. Actually I was
remembering an external dashpot fitted to the Weber that was on a 1970
Cortina I had. Its function was to prevent backfiring on rapid decel by
holding the throttle open. Made the car a real pain to drive smoothly. I
removed the whole air injection system from that car to cure the problem.
You thought I meant the ZS oil filled dashpot, attached to the diaphragm?
Sorry,
Atwell Haines
At 09:01 PM 4/27/98 -0400, Trevor Boicey wrote:
>Atwell Haines wrote:
>> But the bypass valve is 'sposed to hold the revs up on overrun
>> isn't it, like an old-fashioned carb dashpot. Hmm.
>
> Yes, but the "old fashioned carb dashpot" doesn't perform
>that job. It is there solely to richen mixture on acceleration,
>there should be no resistance to the piston falling.
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