PRC and hollow stem valves breaking?
PRC and hollow stem valves breaking? 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.
Question is because i want to run the PRC duals on the hollow stem valves.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
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.
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.
Most certainly agree!
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.
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.
Last edited by dubrado; Dec 2, 2008 at 01:52 PM.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
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
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
