Change thermostat after dyno? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ZL1KO · 02-13-2013, 01:39 PM

Had my 2013 ZL1 dyno/tuned this morning, but it appears that it is running about 25 to 30 degrees hotter. The thermostat gauge needle is at 210 degrees straight up. The needle was a little left of center before the tune, but now it is the same distance to the right of center. Do I need to change the thermostat and if I do which one do I need?
Thanks

DangerZL1 · 02-13-2013, 04:04 PM

If you change the thermostat, I think the tune must be modified to change the cooling fan temps and to prevent a code from being thrown due to the longer warm up time for the engine. I wonder why a tune would cause the car to run hotter? Mine only saw 210 during the hottest days of Summer.

67motorcat · 02-13-2013, 04:20 PM

I would defiantly take it back to your tuner.Something is not rite.
What does the DIC say your temps are?

The fans usually are set to come on sooner so your temps stay lower when Tuned.

ZL1KO · 02-13-2013, 07:59 PM

Quote:

Originally Posted by DangerZL1

If you change the thermostat, I think the tune must be modified to change the cooling fan temps and to prevent a code from being thrown due to the longer warm up time for the engine. I wonder why a tune would cause the car to run hotter? Mine only saw 210 during the hottest days of Summer.

May not be anything to worry about, but it seems to me its running a tad hotter. Really hard to know how much with the needle gauge. I'm gonna keep my eye on it. After JRRacing emails me the numbers on the dyno, I will post it. Thanks

ZL1KO · 02-13-2013, 08:08 PM

Quote:

Originally Posted by 67motorcat

I would defiantly take it back to your tuner.Something is not rite.
What does the DIC say your temps are?

The fans usually are set to come on sooner so your temps stay lower when Tuned.

Sorry, what is the DIC? Temp appears to be somewhere between 215 - 220. Will definitely call and ask about the fans. I'm a greenhorn at this

Thanks

HDRDTD · 02-14-2013, 06:39 AM

The DIC is the Driver Information Center, this little screen between your Tach and you Speedometer.
You can change the display to show many different things. Check your manual, put the DIC to display 'Performance Mode' and cycle through till it displays the actual water temp.
Mine normally reads around 195-200.

Nick S · 02-14-2013, 07:35 AM

Well if the tuner leaned the car out a little to make more power then it could in fact be running hotter. Extra fuel in a boosted car helps keep it running cooler. If some of the fuel was removed then running leaner could be the reason why it's running hotter. Also if the spark timing was altered that can also have an effect on the engine operating temp.

KD Innovations · 02-14-2013, 10:08 AM

Quote:

Originally Posted by Nick S

Well if the tuner leaned the car out a little to make more power then it could in fact be running hotter. Extra fuel in a boosted car helps keep it running cooler. If some of the fuel was removed then running leaner could be the reason why it's running hotter. Also if the spark timing was altered that can also have an effect on the engine operating temp.

Exactly.

Did you have any mods done when it was tuned? If so, make sure the coolant is also topped off.

ZL1KO · 02-17-2013, 09:51 AM

Quote:

Originally Posted by KD Innovations

Exactly.

Did you have any mods done when it was tuned? If so, make sure the coolant is also topped off.

Thanks guys for the suggestions and info. I didn't do any mods.....just dyno...definitely gonna check the digital temp on the DIC.

drrm123 · 02-17-2013, 12:14 PM

Whoever tuned it, did he tell you what type of changes he was making to the original tune? A competent person should be able to explain what they did and why, that's one reason I'm hesitant to take my car some place and have someone tune on it that does not know what they are doing. There are too many variables that can be changed on these cars in the maps for someone to think that just leaning out something is the only why to make power. Not saying that is what they did.

02-13-2013, 01:39 PM	#1
ZL1KO Drives: 2013 ZL1 Camaro Join Date: Dec 2012 Location: Abbeville, SC Posts: 5	Change thermostat after dyno? Had my 2013 ZL1 dyno/tuned this morning, but it appears that it is running about 25 to 30 degrees hotter. The thermostat gauge needle is at 210 degrees straight up. The needle was a little left of center before the tune, but now it is the same distance to the right of center. Do I need to change the thermostat and if I do which one do I need? Thanks

02-13-2013, 04:20 PM	#3
67motorcat Blown Cool Breeze Drives: 2011 Black on Black 2SS M6 Join Date: Jul 2010 Location: Pinehurst NC Posts: 1,027 View My Garage	I would defiantly take it back to your tuner.Something is not rite. What does the DIC say your temps are? The fans usually are set to come on sooner so your temps stay lower when Tuned. __________________ 2011 Black on Black 2SS M6 Had a 2010 IBM 2SS M6 Enjoy life.Think of all the women on the Titanic who passed up dessert.

02-14-2013, 07:35 AM	#7
Nick S Drives: 2013 Camaro 1LE Join Date: Jul 2012 Location: Verona, WI Posts: 1,930	Well if the tuner leaned the car out a little to make more power then it could in fact be running hotter. Extra fuel in a boosted car helps keep it running cooler. If some of the fuel was removed then running leaner could be the reason why it's running hotter. Also if the spark timing was altered that can also have an effect on the engine operating temp. __________________

02-17-2013, 12:14 PM	#10
drrm123 Drives: 2013 ZL1 Camaro A6 Join Date: Nov 2012 Location: California Posts: 63	Whoever tuned it, did he tell you what type of changes he was making to the original tune? A competent person should be able to explain what they did and why, that's one reason I'm hesitant to take my car some place and have someone tune on it that does not know what they are doing. There are too many variables that can be changed on these cars in the maps for someone to think that just leaning out something is the only why to make power. Not saying that is what they did. Last edited by drrm123; 02-19-2013 at 08:40 AM.

02-13-2013, 04:04 PM	#2
DangerZL1 Drives: 2023 Black ZL1 Auto Join Date: Oct 2009 Location: FEMA Region 4 Posts: 2,936	If you change the thermostat, I think the tune must be modified to change the cooling fan temps and to prevent a code from being thrown due to the longer warm up time for the engine. I wonder why a tune would cause the car to run hotter? Mine only saw 210 during the hottest days of Summer.

02-14-2013, 06:39 AM	#6
HDRDTD Drives: 2013 Triple Black ZL1 Vert M6 ECF Join Date: Mar 2011 Location: Trenton, Michigan Posts: 7,047	The DIC is the Driver Information Center, this little screen between your Tach and you Speedometer. You can change the display to show many different things. Check your manual, put the DIC to display 'Performance Mode' and cycle through till it displays the actual water temp. Mine normally reads around 195-200.