quote:
Originally posted by "72 GTS:
... I'll fit 180°headers, and then need to relocate the tank ... I read somewhere that I would only need one tank ...
Without a head tank you need two tanks, one for the pressure cap and a recovery tank to catch the hot coolant which is relieved from the system as it expands.
A head tank is equipped with a pressure cap, it serves as the fill point AND the air space within the head tank allows for the expansion of the coolant as it heats up. A recovery tank is not required, therefore you can truly have a one tank system.
So if I were revising the cooling system to have only one tank, I would convert the recovery tank to a head tank, and eliminate the swirl tank.
quote:
Originally posted by Mat_G:
... where is the cross over from 1 3/4 to 1 3/8 then ...
Increase the size of the radiator outlet nipple to 1-3/4" (45mm). The coolant pump inlet is already 1-3/4" (45mm). The size of all of the plumbing between should then be increased to 1-3/4" (45mm).
quote:
Originally posted by Mat_G:
... THEN the Thermo switch needs on the HOT side (assume now lower side) ...
Yes, correct.