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Old 05-02-2007, 04:03 PM   #1
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Default Coolant Temps

What are your typical coolant temps?

The reason I ask is because I was sure I put in a 180 thermostat. However I seem to idle to about 160-165, and never seems to get anywhere above 172-175 during boosted runs and always settles back to about 165

If that's the case then I did something right with my homemade scooper, but I take it either my thermostat is acutally a 160 model, or my easy therm settings are incorrect.
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Old 05-02-2007, 04:07 PM   #2
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I have a 180* thermostat as well.
I see around 160-165 at idle in MT. Cruising with some light boost on and off i stay around 178*.
Yesterday I really got on it. Found a new neighborhood with houses being built in the far corners. It's my new wannabe racetrack. I got the temps up to 203* driving around that little "track".
Sometimes i think my Easytherm values are wrong but cruising with light boost staying around 178* makes sense to me. I don't have a scooper or anything but need one.
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Old 05-02-2007, 04:23 PM   #3
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190-194 whenver the car is moving- cruise or boost. That's with a 180f tstat, 16psi rad cap and big *** rad. I've got the a/c condenser in front of the rad, with the IC and oil cooler stacked on top of eachother in front of that.

Anybody have oil temps in correlation to coolant temps?
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Old 05-02-2007, 04:27 PM   #4
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180-190 while driving.

oil temps often do not correlate with coolant temps.
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Old 05-02-2007, 04:35 PM   #5
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I've never seen an engine that didn't have fluid temps respond in similar fashion. As the engine gets hotter, the temps go up. When it cools they go down.
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Old 05-02-2007, 04:47 PM   #6
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yes but oil temp will change quite a bit faster than coolant temp. When boosting for example, the oil temp spikes quite quickly before the cooling system brings it back down.

This is why people like external oil coolers, to prevent these temperature spikes particular to oil.

In a steady state case, yes the two tempeartures will show similar trends.
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Old 05-02-2007, 04:52 PM   #7
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I just went and played some more. The weather is HOTTTT today. Hot for me anyway. It was staying right around 180* most the time but got up to 190* under heavier boost.
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Old 05-02-2007, 04:53 PM   #8
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I guess I'm not working it hard enough :gay:
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Old 05-02-2007, 05:11 PM   #9
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So are you guys saying your fans never come on? Doesn't the OE fan controlled by the send at the top of the thermostat housing come on at about 97C which would be about 206F.

I beleive that the link won't do any tuning until the coolant temp is at 80C which is 176F.

Something doesn't jiv
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Old 05-02-2007, 05:12 PM   #10
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My fans come on around 180* when parked.
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Old 05-02-2007, 05:16 PM   #11
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What are you using to read the temp?
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Old 05-02-2007, 05:20 PM   #12
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MS, using the Factory CLT temp sensor you speak of....which is exactly why I'm unsure of my temp readings.
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Old 05-02-2007, 05:22 PM   #13
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I to am using the stock sensor calibrated with Easy Therm. Also have been wondering if my temps are correct.
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Old 05-02-2007, 05:24 PM   #14
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I know when looking at the coolant temp on the link I'll 97-98C when the fan turns on. So the temp switch at the thermostat controls the fans and the coolant sensor is at the back of the block. so this should be pretty accurate right?

With the MS and the factory coolant sensor don't you have to do some trickery to make it work? Maybe something is being lost in the conversion.

I'm just going off the information that FM supplies in their install and tuning manual.
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Old 05-02-2007, 05:31 PM   #15
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Scott is getting his temp from the thermosensor in the back of the head. The sensor in the tstat housing is actually thermoswitch that goes to ground at 97c- which IMO is too late for a boosted car in the south. The link can control the fans though if you run a relay ground to the designated pin on the ecu (I did it per the manual). My fan comes on when the car comes to a stop - set to 95c (which I believe is the stock NA 1.8 setting).

Would be nice to see some oil and coolant temps from water/oil cooled turbos, and oil cooled only turbos.

I'd post my oil temps, but they're not representative of a working system. Either my sending unit is whacked OR my oil tstat in the sandwich plate (with cooler attached) isn't working. On my 3 hour round trip I was getting 270f at 3500-4000 cruise. Boost showed the same.
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Old 05-02-2007, 05:31 PM   #16
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One guy had problems with his fans not kicking on. That is solved by removing a couple resistors which is what I have done.
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Old 05-02-2007, 05:34 PM   #17
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I'm looking back at the Easy Therm setup and I don't believe I ran it correctly. I'm going to flash it and see what it looks like afterwards.
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Old 05-02-2007, 05:36 PM   #18
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What easytherm settings are you using. Aussie Drivers adjusted ones or the others?
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Old 05-02-2007, 05:39 PM   #19
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I think it may just have GM defaults on it now. I don't really remember to be honest, acutally I think i just uploaded the standard file, not the mod file by mistake.
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Old 05-02-2007, 05:41 PM   #20
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with the mazda factor specs, i idled warm at about 160, with aussie's, i idle around 180.... I could have sworn the previous owner said he put a 160 thermostat in, not sure though. i hit 200 in boost.
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