[pastry_chef]

Originally Posted by AdamIsAdam

down the RPM range more because my peak RPM is 450 at 3000 RPM (well, it was before I changed my intake and carb).

So if I look to be at 3000 after I shift, that means I'm shifting at 4024 RPM.

Shifting near 4000 RPM would kill your power average down the track.

http://performancetrends.com/blog/?p=7

From your info, from around 4000 through to 5300 your engine is making near 320 horsepower or more.

450 torque @ 3000 is only 257 horsepower.

Acceleration now in G = horsepower now * 375 / (Mass lbs x MPH now)

So imagine "now" you are at 3950 RPM making 323.4 horsepower, then you shift causing RPM to drop to 3000, now your putting 257 horsepower to the ground.
Better off instead to make about 320 HP at 4100, 4200 etc and continue on.