In my case the pump gets very loud. How I understand it that the fuel is hot and the little bit of vacuum the pump pulls on it causes it to vaporize and cavitate at the entrance to the pump which is why the pump gets loud.

My car is multi port and the rails are bolted to the intake. I think there is more heat soak there than in a throttle body injection. I would use a phenolic spacer if you have room just like a carb. I tried to isolate my rails with nylon washers so there is as little contact as possible but under hood temps are just high regardless. After lots of driving a IR temp gun will read just about any part of the fuel system at 130-140 degrees, including the tank.