Has anyone had any experience with these carbs?

I purchased my 40PHH Twins jetted to suit an A15 stocker with a little cam work.

I have them on my worked A12 and I'm having trouble getting them to behave properly. At the moment I can't get them to idle consistently, it sounds like when they're idling there isn't enough fuel and they slowly die out unless I flick the throttle.

I haven't properly synchronized them at the moment as I can't even get them to run consistently to test (using the old school pipe-to-ear technique).

I understand the Pilot Screws (idle mixture regulates air-fuel mixture ratio during idle) are pretty important, what are yours set at? Mine are 1 and 1/2 turns out from seated.

Can anyone please help?

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  Twin 40s.JPG (129.51 KB)