Reply to "Fluidyne - no change in temp !"

At idle or in heavy traffic, airflow through a Pantera radiator is so low that little heat-exchanging takes place. Also at low speeds, the water flow from engine to radiator & back is also slow. So almost regardless of radiator size, with a set of stock fans (which I once measured @t 300 cubic ft per minute of airflow each) you just can't get enough air through the system especially with a modified engine, so your temperature will begin to climb. Increasing airflow with bigger fans (the popular Flexilites move nearly 4x that of stock), moving them to the back of the radiator with a full shroud so the whole rad surface is involved, not just the area directly in front of the fans, different pumps with more efficient impellers & different pully ratios- all help to a point. On my wife's '97 Z-28, its rad has a single sucker fan that doesn't come on until 230 degrees and the gauge doesn't register 'hot' until 245! In traffic, the Z-28 regularly gets up to 245F with little effect. By changing the early 0-220 Pantera gauge to the '73-up 0-260 gauge and calibrating it, one can see whats really happening. So with a tight system, all the air bled out, if you cannot hear the rumbling of boiling water in the pipes below the floor, the engine is not unhappy regardless of the drivers state of mind. The Pantera radiator's size is some 15% smaller than an equivalent Corvette (which is tilted back, not fwd), so in many cases, accepting that the Pantera will simply run a little hot in traffic is realistic & seems to do no harm.