[rotrex]

1 PSI for free :-)
It looks like you are about half way there.
I'd have a close look at the tubing past the TB and any related edges, ridges or couplings to the intake of the SC.
The SC intake itself may also be restrictive due to tight corners or edges.


The same is true for the SC outlet to the intake manifold. I'd check for imperfections. The outlet is not as sensitive as the intake side regarding losses, but still.

I am sure with an other close look and a little fettling of the pipes and couplers you might find that other missing PSI or 2.

Heat transfer though this pipe is largely irrelevant except at prolonged idle and for at the first few seconds in after driving off in city traffic.