Cam is at 1/2 crank speed,, so 30* at the crank is only 15* at the rotor,, hence, - rotor is still 30* from the next tower..
Yeah you are right. I won't comment further about what my actual timing is or was until I do the piston stop test and use a timing light, probably measuring total timing advance above 3000 rpms (if I can make that happen under current conditions). But anyway I tried retarding timing yesterday with the engine running and it only made the problem worse so right now I am suspecting carburetion or maybe a failing MSD 6AL ignition box. There is a good hot rod engine shop about 4 miles from home, if I get desperate I may have to get it towed over there for professional help, at least I could tell them what I have learned up to that point.
Yesterday I also did a visual inspection of pushrods and shaft-mounted adjustable rocker arms. Everything looks right, and looks just as I left it this spring when I had to pull the intake manifold and replaced all 16 hydraulic flat tappet lifters since one of them would not pump up and I had valve noise. Back then I also set the lifter preload/valve lash according to what the Comp Cams guys told me to use since all of those parts are Comp Cams.
