Thread: Newbie with 307 Questions?

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Originally Posted by 63BoxNova

650 is fine, maybe a bit big, you can always jet it down.

Every time I see this statement, it gives me pause, wondering what area of science it came from. I have been in some heated discussions with another member of this board about this statement. According to everything I've learned over the past 50 years, the throttle bore size and venturi size dictate the CFM of a carburetor, not the jetting. The jetting you choose only changes the relationship between the amount of air compared to the amount of fuel that is being pushed into the ports by atmospheric pressure with the intake valve open. A 650 CFM carb is a 650 CFM carb, no matter how you change the ratio of air to fuel by changing the jets.

Denny, I have a lot of respect for your knowledge and will not ever argue with you again. I might end up clutching my chest and falling onto the keyboard!!!!

Suffice to say that you have your beliefs and I have mine. That's why there are over 400 different religions on this rock, because not everyone believes the same. Peace brother.