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Brian developed an rpm-versus-air/fuel table to help him plot fuel and timing additions or subtractions that will result in a smooth tuning curve throughout the entire rev window. Based on camshaft profile, our 408’s power-making parameter appears to top out around 5,000 rpm or so. However, an engine like the Clevor is fully capable of singing beyond 7,000 rpm. Eventually, a custom cam—with a tighter lobe separation, more lift, and more duration—will join Greg’s engine. This addition will yield totally ridiculous horsepower before nitrous is even applied.