Interesting Weber jetting

[BERNIE]

Originally Posted by Eljaro

Hi Bernie,

before massaging the emulsion tube I would try a smaller air corrector jet. The smallest is a 0.80mm size. You should try that first.
You can also try a slightly larger main jet if that is not enough.

Modifying the F14 emulsion would imply drilling the inside well of the tube with a 3mm drill to a depth of 30mm and drilling 1mm lateral holes at about 28mm from the top. It would be a matter of drilling first one, then two and up to four holes and testing each time. The center hole can be plugged with a 3mm brass plug any time again and the tube would be back to original again.


I am glad to hear that my personal feeling about the good response of the F14 tubes has been confirmed on a dyno.
I am still putting my new engine together and have 8 42mm Venturis waiting to be installed. Will see how they work.

Thank you,how do you expect to improve richness with one mm hole from 100 jet (difficult to get 080 air jet!!!).another question have tested F2,F5,F7,F9,F11,F14,F16 on dyno seems F2 not too bad,F14 really much better but too much leaner at the top,but not yet F15 what do tou think about?,

Regards,

Bernie