Engine temps Too cold or good?
#1
Engine temps Too cold or good?
So on the Dnyo the car never went past 168f on the ECU. Mind you she was on there for close to 5 hours. Few breaks in between. Afterwards while driving home the stock temp gauge was under the 1/2 way point from what it would normally be dead center. Stop and go traffic it's at the 1/2 way spot on the gauge. Got a Koyo racing radiator and the mazmart water pump. Getting a temp gauge soon to see what it's really sitting at.
#2
FD Daily
iTrader: (26)
Fuel injected engines tend to make the most power and have good economy in the 190-195 range. The only real advantage to running that cold would be preignition resistance and less localized boiling... I say thats too cold. Our thermostat doesnt start to open until around 180f to allow coolant to circulate through the radiator.
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#12
Always Bad Advice
So, what temperature did it run before the dyno session? If it was normal, the thermostat failed in the stuck open position during the testing. You can linerize the stock gauge, which will add one more bit of temperature information at a critical spot in the engine not covered by the ecu temperature sensor or an after market sensor.
#13
Rotary Freak
iTrader: (5)
Fuel injected engines tend to make the most power and have good economy in the 190-195 range. The only real advantage to running that cold would be preignition resistance and less localized boiling... I say thats too cold. Our thermostat doesnt start to open until around 180f to allow coolant to circulate through the radiator.
#16
rotorhead
iTrader: (3)
I can recall maybe 2 or 3 going bad on various vehicles I've seen. Both read lower. On new cars, the ECU is smart enough to throw a code if the sensor is reading too low or high, because it has a water temperature model.
If you've got one of those infrared thermal sensor thingies with the red dot, you can get a ballpark reading from using that as to what the temperature should be. Like warm the engine up with the radiator cap off, point it at the coolant and compare the reading to what the ECU sensor says.
If you've got one of those infrared thermal sensor thingies with the red dot, you can get a ballpark reading from using that as to what the temperature should be. Like warm the engine up with the radiator cap off, point it at the coolant and compare the reading to what the ECU sensor says.
#17
Been a while... So was looking at taping the throttle body coolant line Like Dale Clark did to install my AEM water temp gauge
https://www.rx7club.com/3rd-generati...d-idea-392910/
What I found is on the diagram attached where the hose is coming off the engine to go to the throttle body (what i wanted to tap) isn't there. It's headed right back to the WP. So the throttle body coolant line was deleted. Is that ok?
Edit: I added another diagram to show.
thanks
Carl
https://www.rx7club.com/3rd-generati...d-idea-392910/
What I found is on the diagram attached where the hose is coming off the engine to go to the throttle body (what i wanted to tap) isn't there. It's headed right back to the WP. So the throttle body coolant line was deleted. Is that ok?
Edit: I added another diagram to show.
thanks
Carl
#18
I
iTrader: (3)
Been a while... So was looking at taping the throttle body coolant line Like Dale Clark did to install my AEM water temp gauge
https://www.rx7club.com/3rd-generati...d-idea-392910/
What I found is on the diagram attached where the hose is coming off the engine to go to the throttle body (what i wanted to tap) isn't there. It's headed right back to the WP. So the throttle body coolant line was deleted. Is that ok?
Edit: I added another diagram to show.
thanks
Carl
https://www.rx7club.com/3rd-generati...d-idea-392910/
What I found is on the diagram attached where the hose is coming off the engine to go to the throttle body (what i wanted to tap) isn't there. It's headed right back to the WP. So the throttle body coolant line was deleted. Is that ok?
Edit: I added another diagram to show.
thanks
Carl
And you still can install your gauge sensor in that line because it routes it back to the WP.
J.
#20
So I finally got around to installing the temp gauge. And there is a 40 degree diff in temps. So the ECU actually thinks it's cold when it's not. Once the engine get to 190 the fans kick on and looks like the thermostat is working as intended also. Temps will go up close to 200 and slowly drop back down to 180ish. This is all in the driveway idling.
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