John, do you by chance have an all metal radiator with an extra row of cores? This might drop the temperature of the returning coolant by a few degrees and keep your fuel tank that much cooler. I'm still running on the OEM radiator and haven't had time to change it out. The simplest way to insulate the pipes would be to replace them with lengths of silicone hose. What I really would like to see someone do is make a double wall pipe with a vacuum envelope like a thermos bottle. It would be simple to make if you only sleeved the straight pieces. Then pull a hard vacuum and solder it closed. I'll add that to my job stack. Maybe I'll get around to it in a few decades. :-) > Walt, I don't know what it is, but I had one fuel pump that made more noise, > so I replaced it, and that was 2 1/2 years ago, I see no difference in hot or > cold. I hear all the post about it, but have never experienced it myself, 110 > or 40 degrees, no difference. > John Hervey