What RPM should I shift at?

I use the tach as a tool to set idle speed and get an AFR reading at xxxx RPM as things get dialed in. I shift when the engine noses over. Shifting as high as possible keeps engine in it's power band.

For example, if I shift over 6k with an 2.65 gearset a833 something isnt right if it falls back to 4000rpm, even with a loose clutch.

The Wallace Racing page has a handy calculator:

http://www.wallaceracing.com/calc-rpm-drop-shift.php

Here is the data for a 2.65 Hemi box shifted at 6500 with a 3.23 rear gear and 25" tire.


After 1st Shift: 4,734 RPM. 27.17 % RPM Drop
After 2nd Shift: 4,681 RPM. 27.98 % RPM Drop
After 3rd Shift: 4,676 RPM. 28.06 % RPM Drop
1st Gear is 56.50 MPH at 6500 RPM
2nd Gear is 77.58 MPH at 6500 RPM
3rd Gear is 107.72 MPH at 6500 RPM
4th Gear is 149.73 MPH at 6500 RPM