The build quality of your motor will take far more rpm then point where the HP level it can produce has well nosed over!
With this comment I am assuming that your valve springs are good to 6000 rpm.
I don’t think you will find much of a change if you shift ar 5200 or 5500 for street usage, at the track if you do such with good traction things may be different though.
The main thing is that when you do shift you want the rpm to drop right back into the middle of the torque band, and this rpm range you will find out from the chassis dyno run’s ,big for now figure 4000.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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