dubrado

iTrader: (20)

I read that the hollow stems might break off easier if there is a very strong spring with high pressures attached to it. That happen often or just a risk that could happen but doesn't normally?

Question is because i want to run the PRC duals on the hollow stem valves.

PREDATOR-Z

Why? that has no benefits.
What makes hollow stems desirable is to keep the valvetrain as light as possible (Effective moving mass).
IMO running heavy duals on them defeats the purpose, Those are designed for beehive like a high lift PAC with titanium retainers.

BlackScreaminMachine

iTrader: (17)

Most certainly agree!

dubrado

iTrader: (20)

does pac make a beehive that will handle a MS4 cam? I don't feel comfortable witha beehive that goes to .650 when I can have a dual that goes to .660

I allready have hollow stems on the 243's i'm running, it's not like I went out and spend money to replace the stock valve with hollow stems. I got hollow stems with the heads i bought.

PREDATOR-Z

Then you have nothing to worry, I was saying for the purpose. Comfortable is one thing and max performance another.
Yes PAC has beehives that candle that lobe if installed at proper height for cam pressures requirements.
A setup like that would make more power, simply because beehives control harmonics better and uses less energy to do it.
How much more power? Enough to make a difference in championship race

VIPERBLUELX

iTrader: (2)

I too prefer beehives anyday.