- Joined
- May 27, 2013
- Messages
- 1,112
seattle##gs said:Motors will run on a wide variety of carburetion and actually run fairly well. Most people are satisfied with that. And don't know any better. How many people really know what a stock Norton in top tune is like?
This is a bit misleading, particularly in light of those suggesting that a 44mm carb will work on a stock Norton. Not suggesting that is what you mean by "Motors will run on a wide variety of carburetion and actually run fairly well" but it is a very vague statement in light of some of the comments in this thread. While it may be possible to tune a 44mm carburetor, it will not run very well due to a huge drop in velocity. Higher velocity through the smaller carbs of 32-36mm will provide a much quicker throttle response and are sized properly based on the CFM of the engine. Fuel volume required doesn't change just because an oversized carb is used. Even though the throat is bigger the engine can only pull so much air based on displacement. That volume of air will only allow so much fuel to be burned at the proper mixture. It's much better to have the smallest carb that allows the optimum volume of air to flow, because of the improved response.