sirswapsalot

i have a solid cam with 570 lift BBC, the cam card says set a 22 thousands HOT,

what would u set them at cold ???? it does not say ???

thanks for your help

markdunlap

If aluminum heads, tighten .004" cold. If steel heads, loosen .004".

Then recheck after fully warmed up and adjust to spec. Whatever it is off hot from spec, adjust your cold setting next time by that much.

482

Yep !
I set mine @ .016 cold w/aluminum for a .020

sirswapsalot

so i should set mine at 018 cold if it calls for 22 hot ??

markdunlap

Yes. (If aluminum heads)

sirswapsalot

they are steel, not aluminum ???

markdunlap

Ok, set them at .026" then, and double check after completely warmed up to see how close they are to .022 spec.

sirswapsalot

thanks for the help.............

coloradoracerguy

Just as a reference, my cam calls for .026" hot. I adjusted them to .020" cold, fully warmed the engine and let it heat soak for a bit then adjusted them hot. Most were pretty close and the ones I adjusted only needed a bit of a tweak. I checked them cold and they were dead on at .020" again. It might be a bit of a pain to go back and forth like that, but the important thing is that you make sure your "feel" of the gauge you use is the same on all of the valves, and you check them a couple of times both cold and hot and record your findings....After that it's just a matter of the "tweaks" from time to time!

Swiley383

is the same true for a small block?