Tanner
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GunFreak:About 2650rpm at 45mph 3200 at 55mph with 9.00's. The only roads I take that are 55mph around here is when I go to my uncles or the shooting range which is 40 miles round trip. And I only shoot a couple times a year these days. So it will all work out okay afterall. I guess I just got a little burned out yesterday from playing with too many tires. She likes to remind me that although I am 20, I am NOT invincible like I pretend to be sometimes.
Fortunately I have yet to find any evidence showing reduced engine life at these rpms, otherwise GM would not have rated them good for 3600rpm. Fuel mileage may drop a little, but I care more about the longevity of the motor.
Not sure if you have seen this, but here are the HP/TQ curves for a naturally aspirated 6.2 - info from Gale Banks, where they compare it to a turbo'd 6.2...
http://assets.bankspower.com/prod_inline_images/314/62L-turbo-graph.jpg
'Tanner'