As typical, great job Paul ! What I like about those heads are the numbers at .600" lift.
Most of the time numbers are touted at .700" lift, yet as pointed out often the cams used do not provide that type of lift.
Example even many of the hydraulic roller cam lobes, even with a 1.65 rocker ratio.
The bigger hyd roller lobe lift examples being the Comp QXI lobes with .3990" lobe lift and their Xtreme Marine has .3800" lobe lift.
Vizard is a big proponent of valve lift and points out a typical 2-valve ported cylinder head responds to valve lift without a sacrifice of idle and low speed qualities.
So is Tilden Technologies:
"Once the four timing parameters are established, the cam should be designed for maximum lift."
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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)
5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE
Last edited by Steve C.; 12-24-2021 at 02:14 PM.
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