I know I have had way too much free time on my hands lately - I hate winter.Originally Posted by jeepsr4ever
It would seem that, in general, the results you post seem to coincide with what I just posted regarding valve size to displacement, but it is because of the wide variation in practical results that you and others whom I respect seem to have experienced that I have been trying to determine where the disparity is. Perhaps it has just been the various differences in combinations that have drastically effected the cams' expected performance - just a change from a single to a dual plane manifold on the same cam can really twist the expected results.
And I wholly appreciate the fact that many run of the mill grinds have no place in an AMC.
Regarding that Summit 8600, I wonder if it is really ground as specified. This is the one cam that, based upon users comments, seems to defy what I would have expected from it, which was to be a torque loser in a low compression motor at low rpm ranges.
Then there is donwags and crazy's 401 dyno sheets which are the only hard documented results I have had to use as a baseline for AMC cam comparisons, other than my past experience with other engine makes, both cams of which seem to perform in the rpm range you would expect of them. donwags XE256 certainly does not seem to be falling flat on its' face at 3400rpm, rather, the dyno sheet shows it to be strong out to 4800rpm and beyond.
So, I don't know what to say. For my own AMC projects I expect I'll have to try more than one cam before I am satisfied, and will base the first choice on the best evidence I have to support my theories. Seat of the pants from then on out once I have a baselin in my own build. I'll certainly post my results.
Anybody interested in following my 401 build? I am about ready to start and could post pictures. I'm even writing a manual of my build as I go.