OK, did some more research and worked that out for myself.
REPozer, while I can appreciate and even envy folks like yourself who can get by with that logic (and it is perfectly logical) I am way to anal retentive to get by with that. I know it makes sense and the machine was obviously designed to be operated that way. Not having a tach really bugs me.
Soooo, with that in mind....
Understanding that Red-line is 5500.
It stops producing HP at 5250 so there is no point in revving beyond that.
I want a margin of safety so I would not want to exceed 5000 RPM, the HP produced between 5000 and 5250 is negligible anyway.
If I wanted to not exceed 5000 RPM's then I would shift at the following.
First Second Third Fourth Fifth
26mph 45mph 62mpg 75 mph 81mph
That is where my hash marks go.