Roller cam allows a much more aggressive lobe profile, even if you compare against the same advertised duration (meaning “more area under the curve”), which tents to result in more power (specially in higher RPM’s). However, this tends to soften throttle response, since the motor won’t have the same “pick up and go” in lower RPM’s, which is essential for those prioritizing crisp throttle response.
Now, if you are looking for a neck breaking throttle response, nothing beats a well tuned fuel injection (constant flow or electronic). If you are, however, addicted to carbs, three IDF or DCOE Webers would be somewhat close.
PS.: But remember, “carbs” are not good for your body!
