Carburetor cfm calculator

Here’s a brief (I’ll try to keep it that way!) example of what I’ve experienced with my vehicle. I used the examples I showed above as my guide when deciding on a carb. I’ll spare others the details of my setup but just say that using the formulas I came up with basically a 750 CFM carb as ideal.
Started doing some strip runs and the first time at the 1/8 strip after a few runs I was in the 8.02 et at about 86 Mph range. I immediately had a fellow Mopar guy stop by asking about details of my engine. Told him I had a 750, he said I should try an 850. Well that wasn’t happening anytime soon. At another track my 60’ were about 1.75 or so. Had another guy say I should try a 50cc pump. Not possible as I was running a Street Demon 750. Anyway, so over a few years and countless test n tunes without changing actual parts, only tuning incessantly I was able to whittle all my times down with the same carb to the 7.60@89 Mph and about 1.64 60’ range. Then I swapped intakes and installed a 750 DP and gained more.
Now with my head and cam changes and further tuning I’m still running the 750 Holley DP. Running new calculations with my new parts yields an ideal cfm of 830. I’m running 7.20@94 in the 1/8 and 11.44@114 in the 1/4 atm on the 750, but now I’m in the midst of tuning and more whittling away. Maybe some day I’ll up to an 850. The 750 runs pretty sweet on the street as well, is dialed in for street/strip so now I can refocus on other stuff to gain. But if and when I upgrade the carb I won’t go over 850 as again, I err on the conservative side!

Brief? :rolleyes: