What is correct engine coolant temp? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

TheTimanator · 04-02-2006, 09:50 PM

i searched around not too long ago and found someone suggesting 180degF (82 degC) was the optimal temp to run an SR. I have my first fan set to come on at 185 degF (85 degC) and then the second comes on at 190 degF (87 degC).

I have a Koyo aluminum radiator, Flex-a-lite e-fans, and a factory thermostat, about a 50/50 mix of antifreeze and water plus water wetter. At crusing speeds above 45 ish the car stays around 175-185. Idling, it seems to get pretty hot but I don't think my water temp guage is accurate when the fans come on for some reason (probably poor grounding).

Also, I don't the FMIC in yet which will change things I'm sure. It's funny you posted this thread, b/c I was thinking about this today.

04-02-2006, 09:50 PM	#4
TheTimanator Post Whore! Join Date: Apr 2002 Location: Nashville Age: 41 Posts: 2,535 Trader Rating: (1) Rides Gallery: TheTimanator Feedback Score: 1 reviews	i searched around not too long ago and found someone suggesting 180degF (82 degC) was the optimal temp to run an SR. I have my first fan set to come on at 185 degF (85 degC) and then the second comes on at 190 degF (87 degC). I have a Koyo aluminum radiator, Flex-a-lite e-fans, and a factory thermostat, about a 50/50 mix of antifreeze and water plus water wetter. At crusing speeds above 45 ish the car stays around 175-185. Idling, it seems to get pretty hot but I don't think my water temp guage is accurate when the fans come on for some reason (probably poor grounding). Also, I don't the FMIC in yet which will change things I'm sure. It's funny you posted this thread, b/c I was thinking about this today. __________________ 89 S13 hatch/////98 Subaru 2.5RS