[Spridgets] lean mixture question ??

[Dave G.]

As far as I understand it,
The jets, springs needles and SU's on an A-series motor are 
calibrated to the motor *WITH* the air-cleaners attached.
I am checking the engine with the air-cleaners OFF and stock carbs 
with AN needles.
I'm encountering leaning-out (carbs spitting back) at steady higher 
rpms (with the air-cleaners off.)
Is it possible that the increase in air flow (no filter resistance) 
through the carbs is resulting in a leaner than expected mixture.....

Or am I completely on the wrong track.....

--
Dave G.   KK7SS
'65 MK III Sprite in Richland, WA

If I wake up in the morning, and I hurt, it means that I'm still 
alive !!