[stepside454]

Originally Posted by 71C10

BG's Road Demon would be better for 5500 RPM and below, unless your cam has 220 or more duration, as per their recommendation.
BG Link.

Yep Agreed

[curtis73]

Originally Posted by mattson70

VE, is that volumetric efficiency?

Yep. Its a representation of how much the cylinders actually fill compared to their volume. A 5500 rpm engine probably is around 85% VE.

A Qjet would be a great choice. They are rated at 750 or 800, but they have secondary air doors that only open as much as the engine needs. That's why the same basic carb was installed on everything from V6s up to the Caddy 500. They're a great way of making sure you have enough carb without getting too much.

[71C10]

Originally Posted by mattson70

VE, is that volumetric efficiency? So, buying a 750 cfm carb to put on a motor that eats only 600 cfm at 100% VE is probably a waste of money? Thanks for the help.

Like Curtis said, look at the picture of the 388 dyno sheet. The column "Air 1 scfm" is the measured amount of air passing through the carb at each RPM step.