Well.. the temperatures on the injector pump are even lower
than in the filter coils. I've started constructing a heater
using nichrome wire that will slip between the filter and
the coolant coils.
But first...
I decided to try insulating things. I bought a $3.95 piece of
pipe insulation at Home Depot. My installation has a hose
that's about 4' long going from where I Tee'd into the heater
hoses at the firewall over to the VO filter. I insulated that
entire piece. I also stuffed a roll of neoprene around the top
of the copper coil, and I covered the whole VO filter/valve
assembly with a piece of foam rubber to help insulate and
prevent through airflow.
I haven't had the laptop and gone driving to actually measure
the temperatures since I've done this, but I'll post the
report when I have it.
You can compare this picture with the top-right picture to get
a feel for what's changed.