As the title states. What are u guy's valve guide clearance in your high hp motor builds? Its a b16 head.

 

Good luck getting info on this from the high HP guys. That's one of the secrets to keeping a head together.

 

.002-.004 intake .004-.006. exhaust I tend to like them towards the tighter end. I have noticed most stocks engines are very loose.

 

You talking about the valve lash or the actual valve to guide clearance?

 

Valve to guide clearance. one of the things often overlooked when building a head and the one thing the pros never divulge lol.

I too am wondering what it needs to be but when endyn ports my head and installs bronze guides and beryllium seats I bet if I ask nicely they'll clearance them for me.

 

You use these clearances in your turbo builds? I just need to know so i know if i have to replace my guides because they are out of clearance.

 

How high are you spinning the motor, how much boost, what fuel, and what valve material?

 

Head has been ported ferrea 6000 series valves with keepers,supertech springs and retainers, s2 pro2 cams.. i think i need a.new head now. Shop just called and its been decked 10 thousandths too much..

 

I've seen some of the more hardcore people with super expensive heads weld material to the head and deck it back to spec...

but that's time consuming, expensive, and can easily go wrong. of course you have to weigh that against finding another clean head and having it ported, etc.

 

yes no oil getting by now, I was before. It was loose enough before that I was getting oil going by past the seal and detonating.

 

with new stock valves and stock valve guides the clearence is ok for up to 600hp

if you want to rebuild an old engine for a lot of power you sould buy the valve guides that they are suggested by the valve manufacturer (ie supertech)