David- Cliff has previously acknowledged potential issues with lack of spring pressure and is quite aware of its ramifications. Below is one example when someone made this statement;
"A friend of mine put a 455/6X combo together with that cam, RPM and an 850DP. With 4 tubes it made 480hp at 5200rpm and about 520ft lbs at 4200rpm."
"Decent numbers, but any particular reason it quit at 5200rpm's? My much smaller cam made peak power in a near identical combination at 5600rpm's....hmm, makes me wonder once again about what Steve mentions about valve bounce......Cliff"
Stated: "...why don't you just man up and spend the money on a day at a chassis dyno for a few pulls?"
Posting copies of the dyno sheet would be better.
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