Technical Details and Career Transition
At 6:04 in
Former Pontiac Motorsports Manager John Callies: Epic Golden Era NASCAR Stories & Garage Tour!
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John further elaborates on the technical advantages of the new cylinder heads, explaining that original SBC (Small Block Chevrolet) heads had 23-degree valves, which race teams would 'roll' to 18 degrees. Their new Brodix heads featured an even steeper 11-degree valve angle, a significant improvement for power (modern LS engines are typically 15 degrees). He emphasizes the challenge of designing valve trains for such extreme angles. He also discusses his later career path, moving from Pontiac to starting a crankshaft company due to a lack of suppliers, and then a lifter company with Ed Morel, which has been in business for 17 years. He notes the fun and continuous learning involved in these various ventures.
Goal: Explain cylinder head mechanics and summarize Callies' entrepreneurial journey.
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