Just trying to find out what kind of power people are making on stock valves.
Already did a search just found stuff for a d16 motor.I should be making over 500wph already have springs and retainers.

 

I cant belive knowone knowes anything about this

 

Valves aren't really a part that won't be able to handle power. They are not like pistons or rods, which will break because of extreme boost.

If your asking about the flow of the valves? Yea, that's a different story. The stock valves should flow plenty for 500whp, and most people, when upgrading, rarely go huge with the valves, they go to a slight oversize.

 

THANKS