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Pontiac’s Tunnel-Port Powerhouse: The Ram Air V


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#1 Bob Riebe

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Posted 22 June 2022 - 22:22

1969-Pontiac-Ram-Air-V-head-and-intake-6

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I have read in the past that these did end up being used in NASCAR's answer to the Trans-Am the Grand American Series as did the Tunnel Port Ford heads.

https://www.macsmoto...r-v/#more-90935



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#2 Magoo

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Posted 24 June 2022 - 22:44

Pontiac fell into the same trap with as Ford with its tunnel-port engines (302 and 427 CID). The port volumes were far too large, resulting in the classic light-switch engine. Poor mixture distribution and throttle response, poor torque curve.