Originally Posted by BSB67
Originally Posted by lewtot184
all they're doing is richening up the idle jet. the idle jet is the small tube in the primary cluster. i do this a bunch and is a major help on factory avs's. in short go to .035" on the 600cfm carbs and somewhere between .037"-.040" on the 750's and 800's. i never use large squirters on anything i drive; they don't work. i do use the tan colored accelerator pumps exclusively. also look for casting flash in the groove that feeds the pump reservoir. simple stuff.

i'm going to add something else. i've found dealing with the 800avs (not the avs2) that taking fuel out does help them drive better off idle. they have a .040" idle jet and don't go bigger. i've reduced main metering jet area and used small squirters to improve tip-in.




35 year old stuff. Probably 15 year old stuff 35 years ago. What's old is new again.

I remember you and I talking about this in the early 1990s. You were giving pointers back then. Probably what you said above.
when i got back into the afb/avs i just did some research on old info and service manual specs and applied it. some of the old race tips help too. there's info out there and the edelbrock parts support helps. using some grade school math figuring jet area's instead of just jet or rod numbers helps. i enjoy the challenge and the challenge isn't big. i firmly believe that the afb carb was and still is a very good efficient design.