Re: Valve Lash & High Lift Rocker Arms
Have you ever talked to anyone at Berg about why they suggest .004" ex and .006" in? No? Well I have. It's purely a performance setting. More lash on the intakes changes valve timing ever so slightly and will boost the vacuum signal a tad. Perfectly sound theory, and just barely noticable,,, barely.
Scott, do what you want but like I said, it's not the lash that's important. It's making sure that there is lash for a long enough period to cool the valve. So you may be seeing a 13% decrease in lash with a 1.25 arm, but if you map out the cam profile, you're splitting hairs on seat time. Maybe 1% if you're lucky, but that's eaten up through the imperfect method of setting lash with feeler gauges. A dial is really much more accurate, but a PIA for such a simple job. --Ryan