Defiant quote on redline

[gijoe985]

Hm. Maybe. The line on the tach won't move, but the _real_ maximum velocity in most engines is determined either by a) valvetrain float or b) crankcase ventilation by connecting rod portion impingement.
It'll more effect how quickly you get to redline than where the redline is.

This quote is a few years old. (I like the search button) Can anyone expand on crankcase ventilation by connecting rod portion impingement? So does this mean that the crankcase is building pressure that is keeping the pistons from being able to move faster? If so, could this be lessened by creating larger ports for the crankcase pressure to ventilate? Just a thought...

 

[turboglenn]

That would mean a rod poking a nice vent hole in the side of the block (but that's just my take on the quote based on a track record of smart assed remarks that are often funny if you can figure them out )

At least it doesn't say "Watch-out, because when you're asleep I'm editing your posts"

 

[Defiant]

Can anyone expand on crankcase ventilation by connecting rod portion impingement? So does this mean that the crankcase is building pressure that is keeping the pistons from being able to move faster? If so, could this be lessened by creating larger ports for the crankcase pressure to ventilate? Just a thought...

No. It means when a rod seizes its bearing after oil starvation at excessive revolutions-per-minute, it'll snap like Joe Theisman's ankle and its stub or other shrapnel it's kicking around will knock a hole in the side of the relatively-thin wall of the crankcase casting, allowing fresh air to circulate freely in what had been a closed space.

A broken rod will knock a hole in the block.

 

[turboglenn]

"Maintaining paranoia levels" I love it I would almost start to feel left out if i didn't see an Edited by: Defiant in my posts when i log on

 

[MY1GDSM]

A broken rod will knock a hole in the block.

But how Defiant?

Why did my first post get deleted
~ I know it wasn't Defiant !!!