Hey Guys
I have a Chevy 468 with a Wiend tunnel ram with singal 750cfm carb. My Idle is fine I can turn all the way to 5300 rpm. My problem is when I back off it sounds like pop corn or miss fire. I feel it is because the carb I was running had vacume secondaries. Im going to try the same type of carb with mechanical secondaries. I did a vacume test at Idle is at 2-5inches, 3000 is 5-8, 4500 is at 10-12 and full on 5300 is 2-5. Can anybody help.