Free revving to redline is MUCH safer than running it to redline when driving. There isn't any load on the motor in neutral and you will spend a lot more time in the red when driving because..... well... it revs much slower. You got it backwards if you run it to redline on the road but worry about it in the driveway.

Factory heads and cam are the bottle-neck of our motors and you can feel how you quit developing power around 5500. Any further revving than that is useless unless you are trying to keep the motor in the power band after upshifting. The 5.0 is naturally a low-mid range motor. Drive it like that. Buy a wankel or a honda if you want to rev it to the moon.

The accessory drive and top end are the primary reason why you risk damage from over revving. Your bottom end is balanced well enough to spin well over 6k. Valvesprings just don't want to move as fast as the bottom end.

F1 engines rev to 20k partly because they use air pressure to assist in shutting the valves. Generally, valve operation is the end-all "rev limiter".

 

So what you guys are pretty much sayin is that you cant beat the reliability or hurt a good 5.0??

 

If your car is like mine you'll have a rev limiter around 6250 but it's pointless to go past 55 'cause you've ran outta breath then anyhow.