You’ve build the engine block from the ground up. You bored it, honed it and polished and ported it. The goal – MORE POWER!!! But you are going to defeat the purpose of all that work and $$$$ buy tossing the wrong size carb with the wrong size fuel line.
So I ran across the this chart that can help.
If the CID is Carb Size Fuel Line diameter
250 – 300 480-600 cfm 5/16 ”
300 – 350 600-350 cfm 5/16″ or 3/8 ”
350 – 400 650-750 cfm 3/8″
400 – 500 750-950 cfm 3/8″ or 1/2″
There is one other consideration and that is the capacity of the fuel pump, however that can be compensated for by using a fuel pressure regulator.
950 CFM Carb
Thanks for reading
Tim
