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Old 11-05-2019, 11:25 AM   #26
Bored&Stroked
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Join Date: Jan 2011
Location: Central Ohio
Posts: 2,431
Default Re: Flathead Valve Adjusting Methods ??'s

I think the answer is "it depends"! LOL

I tend to run high-lift and higher performance cams with small base circles and heavier spring pressure than stock. I also use very high quality valves. If anything, I've see the lash increase in these situations - maybe .001 to .002.

Some aftermarket cams have a lot of break-in lubricant on them - which when it wears off, increases the clearances a bit.
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