those "flow kooler" water pumps are the ones with the "circular" vanes about 1/4" or so high, on a cast circle base ?
i always like to overdrive the pump some, but is there such a thing as being overdriven too much ? there are only so many pulleys to choose from.
The thermostat serves another purpose, and that is to regulate the flow rate. Removing it will cause overheating but can help compensate for a crudded up radiator.
Pushing the coolant through a good radiator too fast can also cause O/ heating as the coolant may not have enough time to exchange the heat. So I would say yes. remember you are dealing with several variables. Flow rate, pressure driving the flow, pressure in the system, size of the radiator, air flow through the core, Ambient temps, BTU's being generated, and the the infamous core debate itself. Probably a few others as well but that's a kwik list
The "coolant too fast" theory has been debunked dozens of times. Increased flow rate leads to turbulence, and turbulence within a pipe/tube encourages mixing (better contact with the walls to remove heat) and enhances heat transfer performance all the way to the point of physical tube erosion from the fluid velocity being too fast for the material. There have been some potential claimed issues with pumps cavitating, but that has nothing to do with coolant moving too fast in the radiator.
So you seem to be quoting from discussions such as this
https://www.eng-tips.com/viewthread.cfm?qid=262583Not a single respondent to that stated that they were a -hands on- Chemical or Hx engineer and the info given reflects that. Top hit in google isn't necessarily correct.
Laminar flow can affect both the airflow and coolant.
There is a dwell time required for both the air and coolant to absorb or shed heat.
Despite what we observe in the top of a radiator, the coolant in an engine dose not achieve/maintain turbulent flow (exceeds its Reynalds rating) through the entirety of the system (if at all), there are many different flow rates occurring in the different sized passages.
This leaves laminar flow as the predominant effect, with much of the heat moving slowly on the edges and fast moving cold coolant channelling to the centre of flow.
Hence the balancing act of flow rates, volumes, materials in play, size of condensers and so on that every auto manufacturer has had to do for over a century now.
If it were as simple as "make the coolant flow faster", there would be only a few different smaller radiators in use and water pumps would be multistage jobbys flowing many multiples of the volume (and pressures?) in use now.
I use manually controlled heat exchangers on a regular basis and I can assure you if the coolant is too fast, performance can drop to the point of not working at all.
No, im not an engineer, just a tinkerer and a thinkerer
