valve clearence with cromly rods and roller rockers?

[westy68]

hello just installed some roller rockers and cromly rods..i was wondering if anyone knows what the clearence should be if any at all?? cheers Dan

 

[Dirty Harry]

I used zero clearance (cold) on my chromoly rods.

 

[westy68]

lovey cheers chap

 

[Trikky2]

I set mine to 3 thou to allow for the uneven warming process of a cold engine.
Its to prevent the valves not fully closing during warm up.

Rule of thumb is a loose zero for race engines and 3 or so thou for a street engine.

 

[westy68]

set it a lose zero today.. alot smoother and sounds like a well oiled sowing maching.