thermostat

i currently own a 1973 pantera and want change the thermostat to one of the robert shaw type.i puchased what flowkooler calls 333 substitute 160 with brass bypass.during the swap i notice i already have a robertshaw old style with a much larger orifice. brass bypass with the matching thermostat the new thermostat has much smaller orifice, what gives and whats the purpose. do keep the old stat with the bigger orifice or go with the new with the smaller one.

Original Post
×
×
×
×