Valve lash

Dcuda69 said

Excellent info from a great source! Does the same hold true with Eddy heads? I have a Comp street solid roller in my 470" It wants .016 and .018 hot. I hate checking them hot so can I also do .010 and .012 cold. I know every engine is different but.....??

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In my experience yes. Aluminum Edlebrock, Indy, Trick Flow, 440 Source, Speed Master. 10-12 years ago (maybe more) I found out about it reading a Chevy engine build article using Edelbrock Aluminum heads. Then the Edelbrock Tech Line told me their heads wouldn't do that when I was purposely testing and measuring the valve lash on a set of Edelbrock 440 RPM heads. From cold to hot I was seeing a +.005"-.006" change in lash. Never consulted Edelbrock's Tech Line after that.

And by-the-by, with aluminum block and aluminum heads I tighten the cold lash .010"-.012" from the hot lash setting. Gets a little dicey with a very tight lash cam.