i'm switching out my tbi setup to go carb.
is a 600 cfm just right for my engine?

i have a 305w/lt1 cam,416heads,longtube heddman hedders,edelbrock intake,open element k&n,3" flowmasters exhaust.

 

depends on what carb it is. i had a 600cfm vacuum secondary holley on my combo and went 13.70's, but i put a 650cfm double pumper on and went 13.0's...so, yeah. but i think the double pumper part had more to do with it then the 50 extra cfm. i believe a 650 is about optimal though, but the 600 is nice and doesn't require as much fuel to run properly.

 

I run a 600, and it gets it

i also get 15-20 mpg too

 

peak rpm x cubic inches / 3456 = required cfm

6000 x 350 / 3456 = 607cfm

 

yup, however holley dry flows their carbs so it probalby flows 500 somethin wet, i think ud be good getting a 650 double pump, once again it all depends on how high ur spinning or have the potential to spin (since it wont spin that high...well make power that high if ur not gettin enough a/f)