[ToyCollector]

Keith, I would think if you run a 4 barrel with a "turkey pan" it would shield it a good bit from heat as well. No significant vapor lock so far with mine. The above answers are excellent. The fuel injection lines on planes get it all the time after a quick gas stop since they are literally an inch away from the cylinder jugs. There are procedures to literally circulate all the fuel in the system, sending hot fuel/vapor into wing tank, and restoring lines with cold fuel for start. Watch a 6 cylinder plane (i.e. a Bonanza, Cessna 206, Saratoga) come in for a stop and see how long it takes to start!