Cost to rev higher

[clshore]

Street/Strip SBC or SBF safely revs to 6000 rpm
How much more money and how much shorter life to build to:
Safely rev to 6500 rpm?
Safely rev to 7000 rpm?
Safely rev to 7500 rpm?
Safely rev to 8000 rpm?

Bearing loads and component loads are from 2 main sources:
Gas loads on piston crown : intake,exhaust,compression,combustion - proportional to BMEP (torque), once torque peaks, decreases with RPM.
Inertia loads due to rotating and reciprocating components - proportional to the square of RPM, and grows exponentially with RPM.

So compared to 6000 RPM, the relative inertia loads are:
6500 - 1.17 X
7000 - 1.36 X
7500 - 1.56 X
8000 - 1.78 X
8500 - 2.00 X
9000 - 2.25 X

At some point, you will discover the weakest link, or as described above, you will discover the part that has been waiting to fatique fail.
This assumes that your cam timing can be optimized for your RPM, that the gasflow limitations of your intake/exhaust systems can
be overcome, and that your ignition timing is optimized and system can deliver consistent sparks.
All else equal, higher RPM will permit your engine to burn more fuel per second and make more power.

[289nate]

Power pulses. We still doing that?

[EDC]

Power pulses. We still doing that?

"Bites at the apple"