I checked my old motorsport catalog (96). It states the peak torque to hp rpms as: B303 3300 to 5100, E303 2500 to 5500, F303 2800 to 6,000, X303 3500 to 6500. Going by those figures yes the e cam should pull higher. The B303 actually has more aggressive duration figures than the E303, probably makes more power but in a narrower band. Hope this helps a little.
Tom
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