The fuel issue, like yours, has been an ongoing discussion on the FBBO site. One guy tested the current pump swill and found that the fuel boils at 150*. Think about that. Your engine is running, on the coolant, at 180* or more. Mix in the radiated exhaust heat plus other heat sources. On my own 65 Coronet, after driving it for 20 minutes or more, would have the fuel boiling in the tank. Car has 3" TTI exhaust that at that area has anywhere from 1" to a little more for clearance between the pipes and the tank. The car would be fun to drive since it was blubbering from fuel boiling in the carb too. I put on a carb heat shield plus used the blocked off heat riser intake pan shield/gasket and that helped on the engine side but the other end was still an issue. For sure we need better venting back there. Is your fill cap vented or non vented? Mine was vented but I still got a whoosh when it got opened.
That is so true. This pump gas we get today is junk. I had some issue when mine started to boil in the carb. This was back a few years when the gas started to get worse. At first I thought my needle and seats were bad as it was boiling the fuel out the carb internal vents into the eng and loading up. I put a 1" phenolic spacer on it and a heat shield and moved the fuel line away from the eng heat as much as I could and it took care of it. Makes sense if the fuel gets hot enough in the tank as I have not had that problem but I do know they change to winter blend here in Md where I live and then back to summer around April as I got gas in March last year and when sitting in traffic for a long while on a 70 degree day I switched my electric pusher fan on in front of the rad when the eng was at 185 and to my surprise the fuel started to boil in the carb as soon as the pusher fan pushed more rad heat over the eng. And the eng never went over 185 I just turned on my electric fan because it looked like I would be there a while. It would never do that on summer fuel as I sat for a 1/2 hr in the summer with my electric fan running and the car never went over 185 and I had no problem at all. This pump gas is junk. Ron
