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Old 01-17-2020, 03:34 AM
Jack Gifford's Avatar
Jack Gifford Jack Gifford is offline
formerly 'Pontiac Jack'
 
Join Date: Dec 2004
Location: Phelps, NY 14532
Posts: 10,182
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Quote:
Originally Posted by ponjohn View Post
... How bad do the opposing valves limit the camshaft?...
Sorry I don't remember a number from when Mark showed me a vertical-plane drawing of the chamber/valves. I only remember that it was significantly greater than the .220" limits of my early hemi (no collision at <.220" regardless of cam profiles or lobe separation or phasing).

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Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons?
... or has built a record breaking DOHC hemi four cylinder Pontiac?
... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967)