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Valve lash adjustment on aftermarket cam


turbogrill

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Hi

 

I bought a cam used without cam card (shabolt m445, same as colt cams 542).

 

What should I set the valve lash to? Stock? 

I read a post saying that a 0.001" change can affect timing up to 5degrees!

 

I checked the cam timing on cyl #1 intake, and its about right. I only have data floating around on internet so hard to make it exact. 

 

Should I atleast make sure that all valves have the exact clearance?

 

What happens if its off? Premature wear?

 

Its for a race engine, someone told me to just make it as tigjt as possible. Not sure about that.

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Setting to stock would be the safest.  Valve lash gets tighter as engines warm up, so if you go too tight you can warp/burn a valve.  Setting tighter is the "racer's edge" method, with racing edge risk.  Could be expensive.

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