Dumb question: Now that you have hardened the camshaft, do we now need to be concerned with the hardness of the rockers, or are the stock Toyota rockers hard enough that that should not be an issue?
Mike- Not a dumb question. The hardness of this cam is the same as the other aftermarket cams that we (the whole community, we) have had very good results with. Again, same cam makers, same process, just a stock grind so that it's compatible with the stock tune, valve lash, etc... It's a plug and play deal. I still recommend lash clearances that are over factory intake spec. We target 12-14 thou on the intake. Factory spec is typically 6-8 thou and 10 at high point. That is too tight, in my view...
I take it that you do not have that rockwell data? Can you provide what the hardness is of this new cam?
I probably do some place. Years back we rockwelled all the major cams, including stock, the lash caps, and the rocker sliders.
The lash caps and rocker sliders were harder than diamonds in an ice storm. The stock cams were 10 HRC points (going off memory) softer than aftermarket, the sliders were something like 30 HRC points more than the aftermarket cams... I'm certain that Jim or I posted this on the forums here at some point... Again, this is probably like 4 years ago...
We tried various treatments to the sliders and the cams to prolong the life. Tried cryo, coatings, etc... interestingly enough, all that science failed and forced cam wiping quickly... the marriage is a fragile one to be sure... Again, we posted about all that way back when, I just don't have the data in front of me since it really only told us what didn't work...