Tractorsport Flowbench Forum Archive

Posted: **Sat Nov 12, 2005 5:40 pm**

For Racing Engine "X" = 2000
For Superstock Engine "X" = 2200
CID = Cubic Inches of one cylinder.

RPM = ("X"/CID) * (CFM@10" water)

NOTE:

When used in a spreadsheet in combination with the formula for Ve as published in my Superflow 110 manual, this formula seems to be based on the racing engine achieving 120% Volumetric Efficiency at the calculated RPM.

Posted: **Sat Nov 12, 2005 5:48 pm**

Larry,
Shouldn't displacement figure into that equation? How can you know what rpm that amount of flow will peak HP at without knowing how big the engine is that it is feeding?

Rick

Posted: **Sat Nov 12, 2005 5:58 pm**

Exactly right Rick....my fingers got away from me....

Larry

Tractorsport Flowbench Forum Archive

Calculate RPM for Max Power - RPM for Max Power