Originally Posted by Johnny4311
i was looking in my comp cams part catalog and noticed that the SBC solid magnum camshaft has no valve lash adjustment information, i thought all solid camshafts required setting valve lash. im considering using the 12-225-4 in my 383 ive heard good things and bad things about these cams, any comments?
valve lash is .022" You can vary that a little .018" to .028" to find maximum performance.
Here is a all around better, more powerful camshaft. Isky pn 201549 Isky grind 547-B Likes about 5-6deg of advance dialed in, especially if you're on the low end of the compression ratio range.
Either of these cams needs 10:1 or more compression. Valve to piston clearance must be checked
. Use the recomended or equal valve springs.
Both need to be degreed in for maximum performance.