Wrapping stock intake with tinfoil bubble and then heat resistant wrap?

Ah, perfect. You've got a link, right?

 

Your project, your call. You're not done yet?
As to you next post...I do this for a living and because I love what I do. All we are hearing from you is talk.

 

Well I learned something today. This morning I hooked up Techstream to my 2011 Prius which has the latest ECM firmware. The car had been sitting all night so the coolant temperature was 81F and the ambient temperature was the same. I started the car and watched the coolant temperature and engine water pump speed. As soon as the engine started, the water pump turned on to about 2600 rpm. When the coolant temperature got to 104F, the engine shut down and the water pump continued running for ~13 seconds and then shut off. I would like to note that the heat and fan were tuned off. This was exactly like rjparker described.

I used the car to run an errand and came home. I connected Techstream again to see how the water pump behaved when the coolant was between 185F and 190F while sitting in my driveway. The water pump behaved the same at those coolant temperatures. I could not get the engine coolant higher then 190F while sitting in my driveway. When the engine was not running and the water pump was off, I then turned the heat to maximum (HI) and turned on the fan. As soon as the fan turned on, the water pump also turned on. When I turning the fan off, the water pump immediately turned off.

This may have been common knowledge by some in this forum, but it is new information to me. I have been reading the Gen 3 forum for the last 5 years and do not remember see this previously. I should note that my memory is getting worse as I age, just like most people.

Thank you rjparker for the information about the engine water pump behavior. This thread has now become more then entertainment for me. It has also become informative.

 

Shouldn't you be turning wrenches?

 

My v water pump shuts off immediately with the engine until full warmup. Then the short delay. I am sure it helps mpg but is likely to cause cylinder hot soaking. It's something I noticed maybe ten years ago when I observed significant thermal cycling of the engine when not moving but still in Ready.

Using throttle to run engine in Ready

Which was the reason to start realtime coolant monitoring with a 210f alarm.



No tin foil but frequent coolant changes.