I've got an edelbrock 7011 and I've got a lean spot just off idle. If I adjust the carb for best lean idle as in edlebrocks tuning manual, the problem is really bad but it gets much better if I turn the idle mixture screws out about 3 more turns. (the transfer slots are tied to the idle mixture circuit) My problem is that this is only getting me so far and i think I've maxed out the fuel that I can get by turning out the idle mixture screws.
It idles at 7-8" of vacuum so thats really the root of the problem. since the idle circuit works on pressure differential, less vacuum = less fuel. I know my motor is a bit more radical than suggested for this carb but I was hoping I could make it work. Suggestions?
I've read about a modification for this on holley carbs here: Living With A Carburetor
Can this modification be done on the edelbrock carb?
My combo; 355 with an RPM air gap intake, Edelbrock #7011 carb (750 cfm)AFR 195's, 9.5:1 cr, Lunatti Hyd roller 231/239 @.050 .535/.550 lift, 110 LSA. I've got a 9" rear with a 3.50 gear and a T56 with (as I recall) a 2.66 first gear.