within 15 minutes which is about the time I hit the highway it was up
to
around 80-90C and stayed there for the rest of the trip.
c) the veggie tank sucking out a decent portion of heat
Could be. But so long as the engine was up to temperature there was
still excess heat available in the engine.
d)the more or less exposed heater lines that run along the bottom of
the car
from the engine compartment to below the rear seat leaking out heat
You could lose a lot there.
e) the lack of a working aux coolant pump
Usually immaterial except at near-idle conditions.
How is your veg tank plumbed? In series with the heater core? Does
it get the hot water first, or second? If first, for sure your cabin
comfort will suffer!
A carefully-rigged parallel arrangement might be better. Could need
some flow adjustment valves to get the balance right so one side didn't
hog it all.
-- Jim
