Restrictor Plates are more commonly used on race cars
that often have high volume electric cooling systems.
They are often on Drag Racing cars that run short periods
and often the goals are to stage at around 100 degrees or
less and complete the run around 120 degrees. I Never advoccated
them on anything but some Drag Race applications.
I have experimented with different drive pulleys (Electric Pumps)
how and observed how the speed of the coolant affects the efficiency
of the cooling process. This is for 50 years and over a career of Drag Racing
and both on and Offroad Racing, not to mention Drift and Slalom. My older
boy has been a Crew Chief on a Pro Drift Team and a Baja 1000 class winner.
Also, he manages one of the major racing experience venues on the west Coast.
Cooling is Paramount on all these venues.
I believe Mopar has engineered the pulley size to be the most effective
for the engine combination. They even had a different water pump with
different vanes for Air Conditioning cars. I am sure that minor changes
in drive speed are irrelevant but to go overboard is ill advised for cooling.one
I may or may not be correct on my posts on this site = but they are honestly
posted from my personal experience with the intent of being of utility to my
friends on this site. If I get enough feedback that they are unwelcome or
misleading = I will be out of here. I have plenty to do in our shop with a dozen race cars
in it.
This is my background/context that I speak from and I am indeed guilty
of being an Old Man.
However, I would not advise you calling me an Old Wife to my face unless
you are on a first name basis with a good dentist (You WILL need one).