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08-08-2012, 08:30 PM #1
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Black- 383 Procharged & N20 Vert
Exploring Rocker-arm Ratio and Cam-phase Tuning - Project Pu
Exploring Rocker-arm Ratio and Cam-phase Tuning - Project Pure Poncho
Since a Pontiac V-8 is a pushrod engine (instead of being an overhead cam design), it afforded us the opportunity to explore a different rocker-arm ratio and determine its impact on power.Since a Pontiac V-8 is a pushrod engine (instead of being an overhead cam design), it afforded us the opportunity to explore a different rocker-arm ratio and determine its impact on power. As built, the Mule enjoyed Comp Cams full roller rocker arms with a ratio of 1.65:1. The stock ratio is 1.5:1 on Pontiac V-8 engines except for the Ram Air IV, V, and SD-421 engines, which used 1.65:1.
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Photo Gallery: Exploring Rocker-Arm Ratio & Cam-Phase Tuning - High Performance Pontiac Magazine
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