I have never had a problem with my pressure lines at all. I have use any where from 10 inches to now about 4 or 5 inches. I have not experienced any pulsing at all that would kill the engine at idle or anything that makes the idle rough. I have never heard any buddy ever say that a pressure line should be a certain length. And that anything shorter then 8 inches affects the engines performance at all. I do agree that anything above 12 inches is getting long and will prolly cause the pressure to drop because of all the extra volume it will need to make up for.


That pulse from the exhaust would have to move all the fuel already in the fuel line much faster then it is already moving. Im sure that the pulse will be very much minamized at the carb end of the works. For one thing the pressure line will not carry all that great of a pulse anyways and any and all pulse will be in the end basically nothing but the typical preesure that usually comes from a line that is longer.


I can see where your coming from but it doesnt really work that way. On paper it may seem true that this pulse would affect it. But remember on paper bumbles bees arent supposed to be able to fly either. And we all know that bumbles bee's are more then capable of flying.