Yes with alluminum drum that figure would be about right.

Anybody that thinks they can stop drum explosions with a rev limiter is just simply wrong.

One reason it has little to do with engine speed.

Your engine is not mechanically connected to your front drum. The torque converter, fluid coupling, is between the two. When the sprag fails the tailshaft spins at an uncontrollable speed. Multiply that by 2.44 if you are using stock gear ratio's. That is what the drum will spin.

The other reason is just because you rev limit the engine RPM does not mean it will not go over that RPM. With all the new MSD tricks we can rev limit throughout a run. With a Data Recorder you can see what actually happens with the engine speed and driveshaft. I'm hear to tell you, just because you have a 6,000 pill in the rev limiter, to say do a burnout, does not mean the engine will never get over 6,000. It does mean the ignition will not provide spark over 6,000. Some folks run a Data recorder on the input shaft of the tranny. I have seen data showing extreme RPM when something breaks in the driveline of cars running torque converters.

Not trying to be smart ellic, just trying to prevent anyone from assuming safety when they don't have it.

Leon