A gummy intake vacuum damper valve
(an entire new subsystem of the vac petcock that needs maintenance) -- if it were gummy what would that do to the "total response curve" of delivering fuel?
Would it decrease it?
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Seriously, the more I learn about the vac petcock the more ways it shows that it can possibly not do what you want it to do when you need it to be doing it.
Now we need to be factoring intake vacuum pulse frequency and vacuum pulse strength vs fuel valve opening distance and duration just to get to fuel flow delivered .... then it becomes fuel delivered vs fuel required by the bowl to get to potential leaning/stalling.
And it can happen at any point in the rolling open of the throttle, buffered only by the fuel sitting in the bowl at the time it starts to take place.
Please, tell me you are pulling my leg (pretty please .....)I turned my old vac petcock into a little vac actuated musical instrument that sits on my desk and I play a new tune on it every time I go and learn something new about that vacsucker petcock.
Now I need to go train me a woodpecker to suck on it at different RPM pulse ranges so I can compare what makes it out of the fuel tap according to how hard I squeeze the woodpecker's balls and how fast he inhales between screams as he speeds up and up and up .....
And now, now you are gonna make me take that vacsucker all apart looking for this new valve thingie that you gummied up and then removed as part of your ongoing vac petcock improvement program.
You is cruel, you is .... all this work for getting new additional ongoing problems and a constant steam of troubles.
All I would make you do is bolt up a simple 2 screw manual petcock assembly you already know how to change out, then you wouldn't ever have to do anything except turn it on (assuming you wanted to keep turning it on and off that is -- most of us don't bother).
No more problems, lots of gas whenever you needed it .....
No more F-whatevers sneaking up behind you and trying to mate with your motorcycle .....
That was a female Ford truck, right?