I may have lost the bet on idle quality...
If you compare a hyd-roller cam to a flat-tappet hyd cam with similar duration at .050 numbers, the hyd-roller cam will always have a longer seat-duration. While the roller configueration allows faster ramp acceleration, it also suffers from slow acceleration off the seat compared to a flat-tappet cam. Therefore, the advertised-duration numbers are slightly longer. This means that a hyd-roller cam with the same duration at .050 lift as a flat-tappet hyd will not idle exactly the same.
(this from a article about fact vs. fiction on hyd-roller cams/ May'02 Chevy High Performance magazine)
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE
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