Keo00civic

iTrader: (1)

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

tepid1

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

met

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

riceburner700

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

wantboost

iTrader: (2)

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.

Keo00civic

iTrader: (1)

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.

Pro-SeriesFab

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

Keo00civic

iTrader: (1)

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..

wantboost

iTrader: (2)

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.

met

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.

turbomaniac

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)