I know something similiar to this has already been posted in the past, but I was wondering at what RPM do you shift when racing your terminators. I've seen some people shift at about 6k and others at higher RPMs.

 

I shift around 5900 rpms. If you check out some of the dyno graphs, you will notice most of the non-ported pullied cobras begin to drop power after 6000 rpms becasue of the loss of efficiency.