Topic: Carburetor Size Calculator

[Grumpyoldman]

Carburetor Size Calculator Version v0.5

This is a simple calculator for determining the approximate size of a carburetor. The Size of the engine can be in Cubic Inches or Cubic Centimeters. The RPM entered should be the maximum RPM the engine is to run (you know that RED LINE on your tachometer). The Volumetric Efficiency is a bit more tricky and is at best a guess unless you have had your engine on the dyno. Some starting points might be like this-

* Stock Engines VE = 0.75 - 0.85
* Mild Built VE = 0.85 - 0.90
* Racing Engines VE = 0.90 - 1.0
* Anything more then that needs a dyno sheet to prove it!

Note these are for normally aspirated engines where the carb does not sit on a blower or otherwise is used on a draw through blown application.

http://www.gtsparkplugs.com/CarbCFMCalc.html

[carvinmark]

Thanks for this link.