[Bobcat]

bingo2 is correct and I wasn`t very clear . For example , a Holley #88 , #89 and #90 jet all have a .104" dia. hole , but all have different flows . Generally , one jet size change is about 5 to 7 % flow change in cc/min. Another example ... a 72 and 73 Holley jet both have a .079" hole , but the #72 flows about 5 % less cc/min than the #73 jet . It`s the chamfer leading into the orifice( hole ) and the orifice together that also determine actual flow . In other words , Holley rates their jets by flow capacity and not hole diameter as it appears that Quick Fuel does .
Are you sure of the orifice size of .0755 on the #72 Holley jet ? My book shows an orifice of .079" for both the 72 and 73 jets . If you based your jet change on the Quick Fuel being the same flow as the Holley , you`re really leaning it out .