Valve lash, solid roller cam/ lifters?

[Shannon Whitehead]

#269411

You most likely have a *tight lash roller*, and the hot lash is about .015″. A viper engine expands a lot so you would want to set it about .005″ cold.

The only way to know for sure is to find out ho ground the cam.

[LATAMUD]

#269437

Thanks Greg. I found an old post with you and EllowViper discussing .002 cold and .014 hot so was planning for that but will contact Comp for the lash then. These cold/hot settings are counterintuitive to what I understood about heat expansion but seeing your name with the info was enough for me to accept it.

Hot I have lash at .014-.015. I had set cold lash to zero based on the valve adjust .000 on Comp Cam card, but set on a 90+ degree day. It’s 51 deg right now, waiting for it to cool down now and going to start checking COLD cold lash. My tuner was worried zero lash cold would translate to valve stuck open when hot, as in tighter lash when hot. So, not wanting to damage anything this early in break in I ask.

The car sounds angry. 15 in vacuum warmed up.

.637 lift in/ex
116 LSA
112 center

[Shannon Whitehead]

#21866

Help please. Anyone know correct solid roller lash settings, intake/exhaust?

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