Quote Originally Posted by zero_presence
yeah that's true. I did run all my lines away from the motor the best I could. I even gave them some extra length to increase surface area for better heat dist.
One of the main things many articles and many books on fuel systems stress is to keep the fuel lines as short as possible to reduce heat soak .................you are doing no good exsposing cool 80 degree fuel to a 150 degree engine bay in hopes of some sort of cooling effect....

The longer it takes for the fuel to travel the length of the line ,the longer it has to soak up engine heat,also the size of the line matters ,if its too large for your application ,it will allow even more heat soak by increasing further the time it sits in the line before reaching the carb/throttle body /injectors...etc.

Thats one of the reasons its recomended to get the regulators as close the the carb as possible to reduce the single non returning line length to reduce heat soak and pressure differences.