Originally posted by 327,JET
The biggest one I could find was the Holley 500 . Center bowl and 50 c.c. accelerator pump. 0-4412C I've heard of smallblock's running 10 second quarter miles with these.
i think maybe the 500 might be the biggest cfm you can buy across the counter, but i know Barry Grant Inc have reworked 2 bbl carbs. up to 800 cfms.