skibum

I have a coolant fed turbo on my Inline Pro kit and am wondering - what is a safe coolant range to run in?

Driving mellow w/no boost and outside temps of 50

gotswap

That seems a bit high. My coolant temp driving the same way as explained tends to stay in the high 180's low 190's.

Have you noticed at what temp your fan is coming on?
Are you running any type of ems?

Soul Coughing

that sounds about right. Your thermostat is designed to open around there as well. The whole idea of the thermostat and fan switch is to regulate temperature even when the system isn't put to the max. If you took out the thermostat and just ran an open system, you would find in the cold weather that the temps were never warm enough to hit three bars. This might also have an issue with coldstart enrichment depending on if you are using AEM or stock ECU. Unless you were going WOT for a few minutes, or possibly were on the highway on constant throttle your cooling system is never getting pushed to its maximum thermal load! I'm sure you'll find that when it gets warmer, the temps may rise 5-10 degress, but not much more than that. Probably in stop and go traffic, If you have a modifry, you'll hit 4 bars, and the fan switch will turn on (i think it comes on at 212). You could buy a lower temp fan switch and thermostat and it might lower the medium temperature in the winter, but in the summer it will still be around 200. Now if it goes past 220, then you might have an issue!

skibum

I did not check to see what temp it was kicking in at.

∙ I have the stock thermostat & AEM EMS

Is your turbo coolant fed as well?

gotswap

Mine is not water cooled but I would not imagine that it has that much effect on coolant temps.

You are still within the safe operating temps so don't worry to much. Check to see what temp the fan is kicking on at, I could have sworn mine comes on in the low mid 190's but not sure. Haven't driven my car in while.

minitoyota

Make sure you have the right calibration table setup in your EMS for the coolant temp. I'm not sure if AEM has changed it yet in newer units but they were slightly off. Try searching, its posted up somewhere in the forum here or on the aempower forums.

You can control the fans with the ems, no need for an aftermarket fan switch.

gotswap

I completely forgot about that. Good catch as the OP could be getting the wrong reading out of the box.

Spec_Ops2087

The AEM EMS was reading temperatures 10+F higher then what they really were.

skibum

ohhhhh - Thanks for the heads up. I will go do some research on the AEM forum.

gotswap

That would put you right around the temps that I am seeing