Hi,
The red line is determined by a number of things.
- Stock bottom end should only go to 5,000 rpm
- cam profile will determine engine power range but the valvetrain must be capable of supporting it. A stock cam is good to 4,500 to 5,000 rpm.
- A performance cam may be good for 7,000 rpm as long as the valve springs and rockers,guideplates,pushrods can take it.Then the bottom end, bearing clearances, performance rods/bolts, balancing, harmonic balancer ,etc have to be up to snuff also.
- Biggest factor is money, it costs big bucks to rev that engine.
Perry.
