Cold Rev Cut

You might heard it plenty of time people says, "Don't drive hard while the engine is still cold". This is because it can cause high friction wear on the cylinder walls, piston rings, pistons and all of the bearings. It also can cause excess gas to go into the exhaust and ignite in your catalytic converter (if you still had one p/s: pun intended). This is why manufacturer put this cold rev cut safety feature to prevent a possible premature damage to the engine done by an immature driver.

The video above shows the cold rev cut comes into play. The secondary cams were engaged but the rev is limited to ard 6500rpm. Big thanks to some fella at youtube for posting this.