Radiator Fan Mod

And what exactly makes you think that YOU know what the temp should be, as
opposed to the temp that the designed system keeps it at......or the range it stays at ???

I propose that you don't know that at all.
Most people think their cooling loop runs too hot.......when it doesn't at all.
Having it too cool can result in inefficient combustion and sludge formation in the oil.

 

Cool idea. I just grill block when city driving monitor temp with an app as it doesn’t even get up to 180F during summer morning shopping. People here get outraged when I say I grill block during the summers.

 

And that will accomplish........
exactly NOTHING useful.

 

Using AC at same time? That’d be akin to riding the brake.

This logic drives a lot of your gizmo acquisitions.

 

Not sure how the Germans do it but funny you mention my wife’s Panamera coolant temp gets up to exactly 201 F and I have never seen it fluctuate once reached!

I think you may have better luck with finding a cooler thermostat.

 

You can just place a resistor in parallel or series of the thermostatic switch that closes the fan relay circuit. Your buddies at project lithium can do the calculations for the resistor need to bring the trip point down to 180. Keep in mind that turning on your AC will also trip the fans ON.

That's how I controlled my fans, when I was poor and couldn't afford a thermo-switch.

 

Given that the "thermostatic switch" operating the fan relays is the ECM, based on the input from the coolant temperature sensor, you'd have to do that by adding the resistor to that sensor. It would do the trick, but it would also change what any scan tool tells you the temperature is, make the overheat light come on earlier, and so forth. If you were watching a scan tool, you wouldn't think you had accomplished anything, because you'd still be seeing the fan come on when the reading was 95 ℃.

 

Yep, that too. My old Honda's had an independent thermo-switch screwed into the radiator; that controlled fan trigger. Wasn't sure how the Toyota was wired; but would accomplish the same goal. You're correct that the scan tool would be lying to you - but he seems to have a lot of mods on his car already. An IR temperature gun would get you the true reading.

 

That was the exact comment you left when posted long ago about summer lower grill block haha

And my answer was before I turn on the ac, I make sure to block the upper grill to 100% also and then blast the ac on power mode.