Marking your HiPo Harmonic Damper

[shelbydoug]

So you SUBTRACT .006" for aluminum heads and ADD .002" for cast iron to the cam card "hot" lash settings?

Yes.

[kjspeed]

Great info, thanks Doug! I wouldn't have guessed that there would be a .008" difference between aluminum and cast iron heads.

Also, just to clarify, would these adjustments apply equally to an FE or 289/302? And for flat tappet as well as solid rollers?

[Drew Pojedinec]

Also, just to clarify, would these adjustments apply equally to an FE or 289/302? And for flat tappet as well as solid rollers?

Not Doug, but clearance is clearance.
You can always recheck hot to see how much it has changed if curious. Valve lash can be a tuning tool as well (although a fairly minor one)

Gets real interesting setting up an aluminum block, aluminum head engine 😂