valve lash
03-11-2012, 08:47 AM
#11
Senior Member
DYNO OPERATOR
Join Date: Jan 2004
Location: central Illinois
Posts: 459
valve lash
Don't do what I said, do what I meant on the valve lash.
It's .004" tighter for aluminum heads and .004" looser for iron heads.
Sorry about that, I was still asleep, I guess.
It's .004" tighter for aluminum heads and .004" looser for iron heads.
Sorry about that, I was still asleep, I guess.
03-11-2012, 10:32 AM
#12
Senior Member
RACING JUNKIE
Join Date: Jan 2012
Posts: 628
Mark's pretty close . .
We have a preliminary cold setting of about +.005 over . . Then, once well warmed, set to cam specs. I can't remember what the cooled setting was (it's written down, 'cause old guys can't remember shit) and we refer back to that as long as we don't change anything in the valve train . .
We also check the hot lash after the third run on qualifying day or before first round of eliminations, just because . . you can tell a lot about your engine's condition by running the valves after a couple (or more) hard passes . .
We have a preliminary cold setting of about +.005 over . . Then, once well warmed, set to cam specs. I can't remember what the cooled setting was (it's written down, 'cause old guys can't remember shit) and we refer back to that as long as we don't change anything in the valve train . .
We also check the hot lash after the third run on qualifying day or before first round of eliminations, just because . . you can tell a lot about your engine's condition by running the valves after a couple (or more) hard passes . .
