Auxiliary Coolant pump idea

[ExtremeCaliber]

Heyo, just wanted to probe someone else who might be more knowledgeable than I would be. I recently spoke with someone who had a merc and got to take a look under the engine bay when he mentioned that those motors use an auxiliary coolant pump that will continue to pump coolant while the car is turned off, and as long as the thermostat is open. I was just wondering if adpoting it to a speed3 would be a good idea?

The main use-case is it gets incredibly hot down here in the south, I have to let the car idle for a few minutes because after going for a spirited drive, the car likes to stay at around or above 100c, and I idle with the ac on for a while to cool down to 85c before shutting the car off, course staying at that temp for a while as that's coolant temp, not oil temp. I had the thought that with this auxiliary system, I'd be able to shut the car down sooner, and I feel it would be a neat mod to cool down our cars much faster without the initial heatsoak. But would like to hear your thoughts on if the idea is even worth diving into and your thoughts. I'm just spitballing the thought since it sounded great for my use case, without knowing much of the possible repercussions.

 

[Awafrican]

idling to cool town isn't the play, cruising is, faster rpm of water and oil ong with airflow through engine bay, idling will raise under hood temp.

the amount of people that do hard pulls on the highway then come off and stop at a light then have issues is ridiculous, cruise get that fair through and cool down then shut off and no need for extra pumps.

 

[jsmith]

Fan controller or better mesh of oil to water (heat) or oil cooler would be my thoughts.

The only real (easy) spot for a water pump connection is on the drivers side, which if you have wheel well access should provide plenty of space.

edit. You can also try rolling down the windows and blasting the heat with the a/c button on to cool down. That’s what I was doing back in the day before fan controller. I believe it keeps the ecu thinking there is a/c compressor load so keeps the fam on but with no extra load (because heat full on) it tricks fan into staying on.