[Fot] Valve Lash While Engine is Hot

[Larry Young]

 From some of these discussions, it seems that people think all cams 
have the same ramp design, which is not true.  We just recently had a 
discussion that the valve should open and close at the point where the 
lift curve starts to take off (see link below).   You can make small 
variations from this for tuning purposes, but you have to be careful.  I 
once ran too much lash on a very aggressive cam.  It ran like a demon, 
but not for long.  The result was a broken rocker shaft and 5 bent 
pushrods.  As for hot or cold settings.  I have not done any systematic 
measurements, but have not found a big difference for our engines.
Larry


On 4/13/2012 8:27 PM, Michael Porter wrote:

I'm kind of surprised Larry Young hasn't weighed in on this one.  Here's
his Tilden Tech page on valve lash:

http://www.tildentechnologies.com/Cams/Tip_Lash.html