[gsharapa]

Charmer,

I think you have the same cam I have the 647 lift solid roller that's in the 514 Ford Crate Motor.

Zero lash would clearly damage the motor and a half turn out sounds more like setting hydralic lifters.

If you have my solid roller cam than you need to set the valve lash and the specs are .024 Hot. The problem is with the aluminum heads they cool off so quick you can't get them consistent. I set mine at set mine at .024 Hot and after she cooled down over night I check the first valve and it was at .018 cold. I set all of them at .018 and it seems to be great and not as noisy. By tighting them up you just move the tork curve up and with all the tork these motors have in a 2,400 lb Cobra that's better also. Just make sure you have solids. If you have a Hydralic cam then the normal setting is tighten until they quit making noise and then another 1/4 to 1/2 turn. Check with Coast and make sure you know what cam you have first!!!!!!!!!!