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GREENBIRD56 · 01-20-2014, 01:05 PM

There is one further suggestion - comes from the Dyno testing of Ted Eaton. Try modifying the carb spacer you fit under the throttle plate to direct the flow out of the venturies a bit. His testing showed that a four hole spacer that has the forward bores tapered to the rear and the rear bores tapered to the front has an advantage over simply leaving a round vertical exit into the slot. His write-up doesn't delve into the why - but I believe it is due to the way the butterflies open. With the carb in hand to see the lower plane - the primary plates swing down and direct flow rearward across the edge of the throttle bores - and then still further down when fitted to a round tube opening. The taper must smooth the exit path - and guide the airflow a bit to ease turbulence. Same must apply to the secondary throttle which is a mirror of the primary.

01-20-2014, 01:05 PM	#2
GREENBIRD56 Member Join Date: May 2010 Location: Tucson, Arizona Posts: 55	Re: Changing a B intake for better flow There is one further suggestion - comes from the Dyno testing of Ted Eaton. Try modifying the carb spacer you fit under the throttle plate to direct the flow out of the venturies a bit. His testing showed that a four hole spacer that has the forward bores tapered to the rear and the rear bores tapered to the front has an advantage over simply leaving a round vertical exit into the slot. His write-up doesn't delve into the why - but I believe it is due to the way the butterflies open. With the carb in hand to see the lower plane - the primary plates swing down and direct flow rearward across the edge of the throttle bores - and then still further down when fitted to a round tube opening. The taper must smooth the exit path - and guide the airflow a bit to ease turbulence. Same must apply to the secondary throttle which is a mirror of the primary.