[RESOLVED] How well do stock valves handle higher boost?

[rossb]

The title really says it all. I'm about to get my head re-machined(timing belt snapped), and trying to decide whether to go ahead and upgrade to some stainless valves, or use stock valves(maybe even cheapo topline's). I remember reading something a while back about the stock valves liking to come apart(where they are pressed together) under higher than stock boost. Any information would be greatly appreciated.

p.s.: Mods feel free to delete if this another one of the beat to death topics, I tried searching

 

[kottyking]

Well seing as how you wanna run around 20 psi, stock is plenty fine. We all know to build a head if you want to rev to the moon, thats a given. The OP never said that he wants to Rev to the moon and back like "shep". So to answer your question stock valves will be plenty efficient for you. I also dont understand what this dude above me is talking about with ss valves "flowing better". A valve is just that, it opens and closes. SS valves are stronger, they dont flow anybetter. You will be fine with stock valves for what you want.

 

[Defiant]

Just to close the circle, yes, stock valves will hold up perfectly.

How this wandered into valve float.... well, things just happen, I guess.

 

[tunitallstar]

well to answer your question from experience....yes you can use stock valves with that boost level and be safe. I ran my stock bottom end on 30 psi from the holset and it never killed the motor. I think you are safe.