Thought I read somewhere that there was + to insulating the bottom of the intake manifold on the 4.7... anyone have comments on that?

Was helping a co-worker in AZ find a problem with his truck. Problem is massive lag on throttle up events. Truck is 2013 ecoboost F150 with the 3.5L engine. Right off the bat while not trying to fix his problem I wrapped his high pressure fuel pump mounted on the engine and swapped the MAP sensor. His MPG LOM gauge has been climbing since. We then, as a test, wrapped the TB with the same exhaust wrap we used on the pump. This significantly reduced the frequency of the lag problem he has. Seems to be directly tied to the TB.

ONe of the things I'd seen on this motor was there is a gap under the IM where the direct injectors live in a torcher chamber above the block. So the thought came to mind to port fresh air into the gap and under the IM in an effort to plow ambient air temps into that area and reducing the heat soak on the area.

Anyone have any input on the original question of insulating the bottom of the IM & performance?

I plan to do this on my 4.7 when time permits to experiment with, just not sure when that will happen.