Quote:
Originally Posted by Jay S
I frequently run solid lifters on bigger HR cams. But I zero lash the solid lifters cold and let the hot expansion be the lash. There is light friction on the pushrods, i don’t use a feeler guage when I do it. The cam does not loose much duration doing it that way over HR lifters. Engine master did a test like that a few years ago and gained 8HP thru the entire power band over a side by side test with a HR lifters. I have ran lash, but it is easier to do and overall works best with no lash. We use the same valve springs as the cam would with a HR lifter. I do add some extra seat pressure though depending on the set up. The engines I have done are 6500 to 7000 RPM street and strip engines and .640 ish lift 240 to 260 @.050”. There are not many mechanical roller profiles that I know of that can do the same thing without another 100 lbs of spring. Which is my reasoning when doing it.. When it needs SR springs I run a SR profiles. I have never been back into one of the the readjust the lash, it doesn’t seem to move.
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Do you think I could do it with the cam I just bought from Butler? The springs I have right now have 140lbs on the seat I think 325 open at .550. with 1.810 installed height so there is room to shim. I wanted to do it, but I was worried about failure just because I have no experience at all doing this and it's not my motor. Is there any risks in your opinion? I just don't know if the solid lifter will hold up over time as the hydraulic lifter will. I didn't go solid cam because I was told that the size I wanted was too small for a true solid cam profile. So, he told me I needed to go hydraulic with solid lifter. But I never heard of doing this before so I felt uncomfortable trying it.