Typical Coolant flow rate and temp?

[cymeryss]

As the questions states, was is a typical coolant flow rate and radiator output temperature for a small displacement engine. In particular I am in need for numbers relating a small 1.6L 4 cylinder engine like a Honda Civic, and a hayabusa 1300cc engine. Any info would be greatly appreciated. Thanks.

Best Regards to all,

Cymeryss

 

[Chumley]

Cymeryss:

What do you mean by "typical coolant flow rate?"

Are you looking for the maximum flow rate while climbing a steep grade with the thermostat wide open at red line with the AC on when it's 110°F ambient, (the flow rate varies based on engine load, outside air temp, rpm, and a few other things too) or something else, maybe the average flow rate, or the overall flow rate range?

The "radiator output temperature" varies based on the above also.

The "typical coolant flow rate range" would be between about 2 and 14 gallons per minute at about 180/190°F at the radiator outlet, but don't quote me on that because it varies!

I'm assuming that you mean the radiator coolant outlet temperature, not the radiator air outlet temperature which varies also.

I don't mean to be flip, but, in general, when you write a post, the more specific your question is, the more specific/useful the answers you get will be!

Hope this helps.

Chumley

 

[cymeryss]

Sorry for not being specific enough. I am looking for an average flow rate, and possible the maximum also, in particular for the two engines that I have specified. I am talking about the radiator coolant output temperature, before it enters the engine and after it has been cooled. Hope this makes my questions clear, and there is somebody with an answer..thanks.

Cymeryss

 

[Chumley]

Cymeryss:

Many ECU controlled engines (that must meet emission control requirements) try to limit the coolant inlet (or radiator outlet) temperature to what I mentioned above, but it can and does vary.

4 to 9 gallons per minute of flow could be considered typical for steady state mild power settings in your referenced applications.

I can't be more specific because there are too many undefined variables. Look at the existing hose diameter for the engine outlet hose. Flow rates of 2 to 5 feet per second are typical for cooling systems.

I hope I answered your question.

Chumley