My setup: steel heads with aluminum rocker stands. Lash increases .001 from cold to hot.



.150 Stroked Y-Block:327.25 ci @ >1hp per ci
 

Great, now I get more practice adjusting and locking. Thanks for the input!

when you customize things, factory specs may no longer apply.  Always go by the recommendation of the cam manufacturer.



Lawrenceville, GA

.012 should be cold. Add at least .004 for hot. .019-.022 hot seems to be the norm.  

Installed, lash adjusted. Cam card says .012" lash, that's the "hot" value right? Factory says .019.

Going deeper. I started the rebuild of the rocker shafts and found that I was sold a bill of goods.

Someone polished out the shafts real nice to hide how grooved they were. I should know better... I have now ordered a new set from Mummert. I do have some good shafts I could rebuild with, but didn't want to risk on this build. Maybe I'll use them on my 272 that's in the side yard...

Note: Mummert says the parts prices online are a bit off as the recent shipments they've gotten the wholesale price is up.

Ok, got my rocker stuff squared away. New adjusters from Mummert $125, rocker bolts because why not, rocker assembly kit since I have to redo them as at least one is incorrect, pushrods.

So glad we have this forum, and these suppliers that are so helpful and have good quality parts for our builds.

Heh. I put the bolts in ziplock bags by type when I disassembled because I didn't know how long it'd be until I got it back together. So I know I didn't cross pollinate the bolts. Someone else did.  

"[I]ntake bolt ziplock"?

Upon further review, I also found that one of my pushrods has a dent, and scuffing wear on it... and one of the bolts in my intake bolt ziplock is definitely the cause, it's too long and whoever built this engine previously put it in and didn't check/notice that it was hitting the pushrod.

I think I'll order new pushrods and adjusters just to be safe. Too much money involved at this point to ignore something that could become a problem.