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Lowering coolant temps - currently 220

 
Old 01-18-2019, 03:31 PM
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jimxms
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Default Lowering coolant temps - currently 220

My tuner is telling me that I need to lower my engine temps as they are currently around 220 when cruising, even with very low ambient temps. Reading some other threads on the forum, apparently 220 is a fairly normal temp for the 2014 year C7, and GM changed some things (water pump?) for 2015 onwards to get the temps around 200.

I'm planning on installing a Mishimoto 160deg t/stat, and running a 60/40 water/dexcool mix with a bottle of water wetter thrown in for good measure. I have also had my long tube headers sent out for ceramic coating.

My question is, is there anything else I can do to keep my temps lower?
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Old 01-18-2019, 03:45 PM
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220 on the analog gauge? or 220 on the digital gauge?
Apparently on the 2014 car the analog gauge is wrong:
https://www.corvetteforum.com/forums...temp-high.html
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Old 01-18-2019, 03:51 PM
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Originally Posted by JMII View Post
220 on the analog gauge? or 220 on the digital gauge?
Apparently on the 2014 car the analog gauge is wrong:
https://www.corvetteforum.com/forums...temp-high.html
220 in HPTuners, so I imagine that will tie in with the digital one?
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Old 01-18-2019, 03:58 PM
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I did the Dewitts HP radiator and heat ex-changer with a 180 degree stat. Normal driving temps were around 180-185 back at the end of Alabama summer.
Got up to 200-205 when long moderately aggressive street driving.
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Old 01-18-2019, 04:00 PM
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I run a coolant booster in all my cars.
On the Hwy,my LT1 varies 189-193

\db2
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Old 01-18-2019, 04:01 PM
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Originally Posted by ONEBADZ View Post
I did the Dewitts HP radiator and heat ex-changer with a 180 degree stat. Normal driving temps were around 180-185 back at the end of Alabama summer.
Got up to 200-205 when long moderately aggressive street driving.
I was thinking about upgrading the radiator too - I assume you stuck with the OEM fans? Does the radiator double up as a trans cooler or anything else other than engine coolant? I dont mind draining engine coolant, but I hate messing around with trans fluids and stuff.
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Old 01-18-2019, 04:07 PM
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Originally Posted by dbaker View Post
I run a coolant booster in all my cars.
On the Hwy,my LT1 varies 189-193

\db2
In addition to 50/50 glycol? or straight water with coolant booster?
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Old 01-18-2019, 04:13 PM
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Originally Posted by jimxms View Post
I was thinking about upgrading the radiator too - I assume you stuck with the OEM fans? Does the radiator double up as a trans cooler or anything else other than engine coolant? I dont mind draining engine coolant, but I hate messing around with trans fluids and stuff.
Yes OEM fans and Radiator is only engine coolant. I'm still running stock oil and trans cooling.
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Old 01-18-2019, 04:39 PM
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160 stat and turn up the fans.
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Old 01-18-2019, 05:38 PM
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Originally Posted by jimxms View Post
My tuner is telling me that I need to lower my engine temps as they are currently around 220 when cruising, even with very low ambient temps. Reading some other threads on the forum, apparently 220 is a fairly normal temp for the 2014 year C7, and GM changed some things (water pump?) for 2015 onwards to get the temps around 200.

I'm planning on installing a Mishimoto 160deg t/stat, and running a 60/40 water/dexcool mix with a bottle of water wetter thrown in for good measure. I have also had my long tube headers sent out for ceramic coating.

My question is, is there anything else I can do to keep my temps lower?

Your tuner should be able to command the cooling fans to maintain a temperature of 190F. That how I set my tune up and I have the stock thermostat. Also, 100% antifreeze is actually less efficient than the recommended 50/50 mix of water/antifreeze. Even on hot days I only see 195F peak on my 2015 C7.
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Old 01-18-2019, 06:14 PM
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Originally Posted by jimxms View Post
My tuner is telling me that I need to lower my engine temps as they are currently around 220 when cruising, even with very low ambient temps. Reading some other threads on the forum, apparently 220 is a fairly normal temp for the 2014 year C7, and GM changed some things (water pump?) for 2015 onwards to get the temps around 200.

I'm planning on installing a Mishimoto 160deg t/stat, and running a 60/40 water/dexcool mix with a bottle of water wetter thrown in for good measure. I have also had my long tube headers sent out for ceramic coating.

My question is, is there anything else I can do to keep my temps lower?
Our radiator will help bring those temps down. Quite a bit thicker than factory and all aluminum. Give us a call 972-429-1963.


Last edited by [email protected]; 01-18-2019 at 06:15 PM.
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Old 01-19-2019, 06:38 AM
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Originally Posted by [email protected] View Post
Our radiator will help bring those temps down. Quite a bit thicker than factory and all aluminum. Give us a call 972-429-1963.

I'll drop you guys a line in a couple of weeks when my car spending budget gets reset. I've already built up a pile of receipts this month hehe.
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Old 01-19-2019, 06:43 AM
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OK so I've purchased an AMP billet thermostat housing with a Motorad 160deg t/stat and I've also got a Mishimoto t/stat on the way for good measure.

I _think_ I'm right in saying that the AMP housing uses a t/stat for an LS3, as I cannot find a Motorad one that would work with an LT1/4. Hopefully this means it is better quality than all of the C7 ones I've seen failing on here?

Last edited by jimxms; 01-19-2019 at 06:44 AM.
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Old 01-19-2019, 10:50 PM
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Subscribed.
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Old 01-20-2019, 02:21 PM
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I did the LG radiator, LMR housing with the 160, I also did the D3 fan set up also, But I do have a A/A TI blower on my car also. Now even in a hard summer in traffic my car may hit 205 with the air on.. I do have a 2014 car A6 also before the upgrades it was 220 plus all the time just to hot for me.

I also use EVANS waterless coolant also in the car.. Some may say not worth it but never have to chg it out and the coolant - & + point is much better the a 50/50 mix... Robert

Last edited by robert miller; 01-22-2019 at 10:47 PM.
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Old 01-21-2019, 07:01 AM
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Originally Posted by jimxms View Post
In addition to 50/50 glycol? or straight water with coolant booster?
For street use with the factory fill.
\db2

Mixed with 50/50 Antifreeze/Water8F reductionMixed with Straight Water25F reduction
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Old 01-21-2019, 02:05 PM
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I saw where they are offering 15% off, just use DW15 at checkout.

https://www.dewitts.com/collections/...ducts/1139114m
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Old 01-21-2019, 04:50 PM
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The oem fan is different on the 14s also. You can buy the 15 up oem fan for about $200 on rock auto. It's basically just a higher amperage motor Gm started using when the Z06 came out.
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Old 01-21-2019, 09:25 PM
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Originally Posted by jimxms View Post
My tuner is telling me that I need to lower my engine temps as they are currently around 220 when cruising, even with very low ambient temps. Reading some other threads on the forum, apparently 220 is a fairly normal temp for the 2014 year C7, and GM changed some things (water pump?) for 2015 onwards to get the temps around 200.

I'm planning on installing a Mishimoto 160deg t/stat, and running a 60/40 water/dexcool mix with a bottle of water wetter thrown in for good measure. I have also had my long tube headers sent out for ceramic coating.

My question is, is there anything else I can do to keep my temps lower?
The 2015 and up have a 90 celcius t-stat which is colder than the 2014 stat. Put a 180 stat in the car, run as little antifreeze as you can ( temps in your garage if you do not drive it during the winter) You maybe can get by with + 10 degree protection versus - 35 degree protection, run a water wetter and have the fans programmed/tuned to come on earlier. I run a max of 185 to 190 degrees no matter how hot the day is.
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Old 01-21-2019, 11:32 PM
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Jim, not sure if you have to worry about freezing temps where you are but my formula is 20% dexcool, 80% distilled water, 1 bottle of water wetter. My car (before I took it apart) was running about 165* at cruising and would peak at about 190-200 max sitting in traffic and would immediately cool down again upon starting to move. I also have an LMR 160 stat and housing in mine.

Last edited by FYREANT; 01-21-2019 at 11:33 PM.
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