Needle configuration

Given: L1 is NOT the length of the straight section of a needle, but the length TO the spot on the needle the diameter is 2.515, so there is likely some taper involved in the L1 measurement.

So, the larger the L1 diameter, the sooner the taper has to start on the needle to get to 2.515 on needles of the same L1???

Akin to º of taper. Other specs the same, a 'B' (1.25º) needle's taper starts sooner than a 'C' (1.5º) because the slope is 'slower'.

Putting three needles into JD's spreadsheet though, CEJ-CEK-CEL shows only what you'd expect from different diameters, namely the bigger the leaner. Maybe the spreadsheet doesn't take into account the angle start difference between different diameters? Maybe it doesn't make that much a difference? At some point, a larger diameter should cause a RICHER bottom due to the sooner starting taper º ?? Or the two offset each other?

Enlightenment appreciated.

Thanks for looking, BRush.

I just looked at the spreadsheet pictures!!

I know there are equations listed somewhere in an XL sheet, but even if I found 'em, I don't know that I'd understand what they were telling me.

Which still doesn't give me a sense for 'rule of thumb'.

ie: A BEL-1 is two clips richer than a CEL-3

A 'rule of thumb' derived from the above gives you an idea how to change angles, and know how close you are to the same overall fuel delivery.

Quite an amazing device, the carby!

If it ever is (satisfied), I'd like to hear about it.

Thanks for your consideration of the 'issue'. ;)