Go Back  CorvetteForum - Chevrolet Corvette Forum Discussion > C7 Corvette > C7 Z06 Discussion
Reload this Page >

Cruising temps in the z06 not bad for 100* out

Notices
C7 Z06 Discussion General Z06 Corvette Discussion, LT4 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
Sponsored by:
Sponsored by:

Cruising temps in the z06 not bad for 100* out

 
Old 06-11-2019, 09:59 PM
  #1  
Pacembellum
CF Senior Member
Thread Starter
 
Member Since: Apr 2016
Location: CA
Posts: 1,563
Received 248 Likes on 191 Posts
Default Cruising temps in the z06 not bad for 100* out

Itís 100 degrees here today and my cruising temps on the freeway with the AC on are barely 200 coolant and under 200 oil. Edit 2017 m7

Last edited by Pacembellum; 06-11-2019 at 10:06 PM.
Pacembellum is offline  
The following users liked this post:
Carvin (06-11-2019)
Old 06-11-2019, 10:50 PM
  #2  
Mr. Gizmo
CF Senior Member
 
Mr. Gizmo's Avatar
 
Member Since: Mar 2010
Location: St. Louis
Posts: 5,082
Received 346 Likes on 278 Posts
Default

Originally Posted by Pacembellum View Post
Itís 100 degrees here today and my cruising temps on the freeway with the AC on are barely 200 coolant and under 200 oil. Edit 2017 m7
They really lose power at this temp even on the street. Seems to run best luke warm at 160 degrees water temp.
Mr. Gizmo is offline  
Old 06-11-2019, 10:56 PM
  #3  
rjacobs
CF Senior Member
 
Member Since: Dec 2004
Location: Dallas TX
Posts: 1,225
Received 148 Likes on 128 Posts
Default

Originally Posted by Mr. Gizmo View Post
They really lose power at this temp even on the street. Seems to run best luke warm at 160 degrees water temp.
You're delusional...
rjacobs is offline  
The following users liked this post:
madrob2020 (06-13-2019)
Old 06-12-2019, 06:58 AM
  #4  
BrunoTheMellow
CF Senior Member
 
BrunoTheMellow's Avatar
 
Member Since: Jan 2015
Posts: 2,631
Received 457 Likes on 365 Posts
Default

Originally Posted by rjacobs View Post
You're delusional...

BrunoTheMellow is offline  
Old 06-12-2019, 07:47 AM
  #5  
Internets_Ninja
CF Senior Member
 
Internets_Ninja's Avatar
 
Member Since: Mar 2004
Location: South Florida
Posts: 1,694
Received 170 Likes on 126 Posts
Default

+1 for Bruno only speaking with facts.
Internets_Ninja is offline  
Old 06-12-2019, 08:03 AM
  #6  
rjacobs
CF Senior Member
 
Member Since: Dec 2004
Location: Dallas TX
Posts: 1,225
Received 148 Likes on 128 Posts
Default

I've never seen my car run under 200... Usually right about there... Ain't no way a car will run at 160... They have a 195 degree thermostat in them. So saying "they run best at 160" is a line of crap because the car will never run there...ever...in stock form.

And I would hardly call a 1 degree reduction in timing "losing a lot of power". I've seen a 1 degree reduction reduce 5hp
. Nothing I would be concerned about... Yes a 10 degree reduction is a bunch but 1 degree is imperceptible in most cases.

Also the poster I quoted(mr gizmo) is a **** stirrer.

Last edited by rjacobs; 06-12-2019 at 08:10 AM.
rjacobs is offline  
Old 06-12-2019, 08:38 AM
  #7  
RobGZ06
CF Senior Member
 
Member Since: Nov 2012
Posts: 3,825
Received 412 Likes on 338 Posts
Default

When I had my ls2 GTO I put an slp 160 stat and tuned the fans to come on at near 100% way before 210. I know that's not ideal or smart but it was a daily and I wanted no overheating issues in summer.

Anyway a shop told me I am actually losing power and probably causing long term damage to the engine because the oil will never get to full operating temp. And the engine will never be at full power because the coolant and oil temps never reach optimal temp range. It made sense so I put the stock stat in. I didnt notice a difference but my UOA said a different story.

Last edited by RobGZ06; 06-12-2019 at 08:39 AM.
RobGZ06 is offline  
Old 06-12-2019, 08:48 AM
  #8  
BrunoTheMellow
CF Senior Member
 
BrunoTheMellow's Avatar
 
Member Since: Jan 2015
Posts: 2,631
Received 457 Likes on 365 Posts
Default

Originally Posted by rjacobs View Post
I've never seen my car run under 200... Usually right about there... Ain't no way a car will run at 160... They have a 195 degree thermostat in them. So saying "they run best at 160" is a line of crap because the car will never run there...ever...in stock form.

And I would hardly call a 1 degree reduction in timing "losing a lot of power". I've seen a 1 degree reduction reduce 5hp
. Nothing I would be concerned about... Yes a 10 degree reduction is a bunch but 1 degree is imperceptible in most cases.

Also the poster I quoted(mr gizmo) is a **** stirrer.
My 2015 has no problem running 190-200 on the highway at 90 ambient. It doesnt have the aux cooler. I am putting a 170 tstat, 2019 auto radiator and aux cooler all at once. I am not changing the fam-come-on temp. It should settle at 172-174 (my z51 did).

The 194 tstat is not fully open at 194.

Last edited by BrunoTheMellow; 06-12-2019 at 08:50 AM.
BrunoTheMellow is offline  
Old 06-12-2019, 09:16 AM
  #9  
rjacobs
CF Senior Member
 
Member Since: Dec 2004
Location: Dallas TX
Posts: 1,225
Received 148 Likes on 128 Posts
Default

Again, in stock form, the car will never run in those temp ranges. My 19 M7, with every cooling enhancement from the factory, runs 196-202 in 90+ degree weather here in Dallas. Never seen it run cooler, except obviously during warm up.

I see the advanced timing at lower temps as a method that GM uses to bring the car up to temp and into the emissions window faster. I dont see it as GM trying to "make more power" at lower ECT's as even GM doesnt recommend running the motor hard until the temp comes up, hence the lower suggested redline until the car warms up.
rjacobs is offline  
The following 2 users liked this post by rjacobs:
NSC5 (06-14-2019), RobGZ06 (06-12-2019)
Old 06-12-2019, 09:38 AM
  #10  
BrunoTheMellow
CF Senior Member
 
BrunoTheMellow's Avatar
 
Member Since: Jan 2015
Posts: 2,631
Received 457 Likes on 365 Posts
Default

Originally Posted by rjacobs View Post
Again, in stock form, the car will never run in those temp ranges. My 19 M7, with every cooling enhancement from the factory, runs 196-202 in 90+ degree weather here in Dallas. Never seen it run cooler, except obviously during warm up.

I see the advanced timing at lower temps as a method that GM uses to bring the car up to temp and into the emissions window faster. I dont see it as GM trying to "make more power" at lower ECT's as even GM doesnt recommend running the motor hard until the temp comes up, hence the lower suggested redline until the car warms up.
....that's because the tsat is closed until that range, if you open the tsat earlier, it will have no problem keeping it cooler. It's a fact that 194 there is timing pulled. There is no problem running these cars in the 170 water range. Oil will be 180-200 still.

Last edited by BrunoTheMellow; 06-12-2019 at 09:39 AM.
BrunoTheMellow is offline  
Old 06-12-2019, 09:44 AM
  #11  
RobGZ06
CF Senior Member
 
Member Since: Nov 2012
Posts: 3,825
Received 412 Likes on 338 Posts
Default

Originally Posted by rjacobs View Post
Again, in stock form, the car will never run in those temp ranges. My 19 M7, with every cooling enhancement from the factory, runs 196-202 in 90+ degree weather here in Dallas. Never seen it run cooler, except obviously during warm up.

I see the advanced timing at lower temps as a method that GM uses to bring the car up to temp and into the emissions window faster. I dont see it as GM trying to "make more power" at lower ECT's as even GM doesnt recommend running the motor hard until the temp comes up, hence the lower suggested redline until the car warms up.
In the ls world, the sweet spot is 200-205 for max power. This is across the boards like lstech etc.

Makes sense. I dont push my car hard until I see 200/200.
RobGZ06 is offline  
Old 06-12-2019, 10:01 AM
  #12  
rjacobs
CF Senior Member
 
Member Since: Dec 2004
Location: Dallas TX
Posts: 1,225
Received 148 Likes on 128 Posts
Default

Originally Posted by BrunoTheMellow View Post
....that's because the tsat is closed until that range, if you open the tsat earlier, it will have no problem keeping it cooler. It's a fact that 194 there is timing pulled. There is no problem running these cars in the 170 water range. Oil will be 180-200 still.
not arguing that at all, just saying, in stock form, its not possible to run the car that cool, so the timing tables being advanced at those temps mean absolutely nothing to me as far as power being produced.

And if you change the thermostat to a 160 or something, then a change in the tune, IMO, is also prudent, to REALLY take advantage of said lower opening temp...and not just lowering the turn on threshold for the fans, but modifying the timing tables among other things. 2-5 degrees of timing advance may or may not yield anything... or it could cause a motor to knock and trigger knock retard...or it could cause a motor to eat itself... There are many tables that deal with timing, not just this one.

Last edited by rjacobs; 06-12-2019 at 10:04 AM.
rjacobs is offline  
The following users liked this post:
RobGZ06 (06-12-2019)
Old 06-12-2019, 11:01 AM
  #13  
distinctz06
CF Senior Member
 
distinctz06's Avatar
 
Member Since: Feb 2007
Posts: 221
Received 18 Likes on 11 Posts
Default

Originally Posted by BrunoTheMellow View Post
It seems like the table on the right is the multiplier for the table on the left. So it seems like the base spark table is tuned assuming 194 deg ECT. At 194 deg ECT the correction multiplier is ZERO, so the table on the left is meaningless at this temperature. Do you have the base spark table?

Example: You are at 212 deg ECT, 5120 RPM and 1.30 Airmass (g). Using the table on the left you would see -3 of correction, on the table on the right you would see 0.168 which is the correction multiplier. So in this scenario I would expect half a degree of timing (-3 * 0.168 = 0.504) to be pulled due to ECT.

Been a while since I've been in HP Tuners so correct me if I'm wrong.

Last edited by distinctz06; 06-12-2019 at 11:02 AM.
distinctz06 is offline  
Old 06-12-2019, 11:04 AM
  #14  
Mr. Gizmo
CF Senior Member
 
Mr. Gizmo's Avatar
 
Member Since: Mar 2010
Location: St. Louis
Posts: 5,082
Received 346 Likes on 278 Posts
Default

Originally Posted by rjacobs View Post
I've never seen my car run under 200... Usually right about there... Ain't no way a car will run at 160... They have a 195 degree thermostat in them. So saying "they run best at 160" is a line of crap because the car will never run there...ever...in stock form.

And I would hardly call a 1 degree reduction in timing "losing a lot of power". I've seen a 1 degree reduction reduce 5hp
. Nothing I would be concerned about... Yes a 10 degree reduction is a bunch but 1 degree is imperceptible in most cases.

Also the poster I quoted(mr gizmo) is a **** stirrer.
I am not saying the car will run at 160. It seems to run best after its shut down for 30 or 40 minutes and then you start it back up, before it gets past 180 degrees coolant temp it seems to run strongest ó once itís in the 190 degree coolant temp range or above it doesnít seem near as strong. ó thatís why guys trying to pull hero quarter mile times let them cool down and get them to the line before they get to full operating temp.
Mr. Gizmo is offline  
Old 06-12-2019, 11:07 AM
  #15  
rjacobs
CF Senior Member
 
Member Since: Dec 2004
Location: Dallas TX
Posts: 1,225
Received 148 Likes on 128 Posts
Default

Originally Posted by Mr. Gizmo View Post
I am not saying the car will run at 160. It seems to run best after its shut down for 30 or 40 minutes and then you start it back up, before it gets past 180 degrees coolant temp it seems to run strongest ó once itís in the 190 degree coolant temp range or above it doesnít seem near as strong. ó thatís why guys trying to pull hero quarter mile times let them cool down and get them to the line before they get to full operating temp.
And thats the case with almost every car out there...

Hot(thin) oil, cool coolant makes the best power(generally speaking). Generally cars also run a bit rich until they are hot, so you are getting some extra fuel too.
rjacobs is offline  
Old 06-12-2019, 11:16 AM
  #16  
BrunoTheMellow
CF Senior Member
 
BrunoTheMellow's Avatar
 
Member Since: Jan 2015
Posts: 2,631
Received 457 Likes on 365 Posts
Default

Originally Posted by distinctz06 View Post
It seems like the table on the right is the multiplier for the table on the left. So it seems like the base spark table is tuned assuming 194 deg ECT. At 194 deg ECT the correction multiplier is ZERO, so the table on the left is meaningless at this temperature. Do you have the base spark table?

Example: You are at 212 deg ECT, 5120 RPM and 1.30 Airmass (g). Using the table on the left you would see -3 of correction, on the table on the right you would see 0.168 which is the correction multiplier. So in this scenario I would expect half a degree of timing (-3 * 0.168 = 0.504) to be pulled due to ECT.

Been a while since I've been in HP Tuners so correct me if I'm wrong.
There is something missing to make the table on the right make sense. I know at 6000-6500 rpm, 248 coolant temp, 1.3 airmass, there is a lot more than 6 x 0.138 = 0.78 degrees of timing pulled. Let me try and find more info on those tables. here ya go, the circles were done by another member. He was showing that he found timing pulled at 200*F at WOT. The tables prove that. People are seeing 21 degrees of timing at WOT at normal operating temps btw.


Last edited by BrunoTheMellow; 06-12-2019 at 11:23 AM.
BrunoTheMellow is offline  
Old 06-12-2019, 11:29 AM
  #17  
Road machine
CF Senior Member
 
Road machine's Avatar
 
Member Since: Jan 2015
Location: NJ
Posts: 3,122
Received 105 Likes on 74 Posts
Default

On my 2019, what I experience is a very long time to warm up. It takes about 10 minutes of driving for the lower red line to go away completely. It doesn't bother me at all ... just an observation.
Road machine is offline  
Old 06-12-2019, 12:39 PM
  #18  
andreas g.
CF Senior Member
 
Member Since: Nov 2002
Location: laguna niguel ca
Posts: 1,437
Received 40 Likes on 26 Posts
Default

I have a 16Z M7. 2300maggy, kook LT, 5% pulley, afe intake, x tank, and tuned. Now the fans come on a little earlier than stock. Stock stat. Highway speeds car runs at between 183-188, oil at 180-197. In traffic 190-197, oil at 190-198. Oil hit 201 once. Coming back from Las Vegas at 98-100 degrees at between 90-110 mph plus car ran at 185-188 degrees. Point is all my three C6 Z06ís ran 160 stat. No issues but it seems these LT4 modded motors are happier at warmer operating temps
andreas g. is offline  
The following users liked this post:
RobGZ06 (06-12-2019)
Old 06-12-2019, 03:24 PM
  #19  
Carvin
CF Senior Member
 
Carvin's Avatar
 
Member Since: Jan 2015
Location: Westmont IL
Posts: 1,377
Received 191 Likes on 152 Posts
St. Jude Donor '15-'16
Default

Originally Posted by Road machine View Post
On my 2019, what I experience is a very long time to warm up. It takes about 10 minutes of driving for the lower red line to go away completely. It doesn't bother me at all ... just an observation.
Yes, it takes a lot longer to warm up than my C6 did. Got the oil to 220 during track laps last week. The A8 went into performance shift mode so I was in 3rd most of the time.
Carvin is offline  
Old 06-12-2019, 03:33 PM
  #20  
BrunoTheMellow
CF Senior Member
 
BrunoTheMellow's Avatar
 
Member Since: Jan 2015
Posts: 2,631
Received 457 Likes on 365 Posts
Default

Originally Posted by Carvin View Post
Yes, it takes a lot longer to warm up than my C6 did. Got the oil to 220 during track laps last week. The A8 went into performance shift mode so I was in 3rd most of the time.
You really weren't pushing it huh?
BrunoTheMellow is offline  

Thread Tools
Search this Thread
Quick Reply: Cruising temps in the z06 not bad for 100* out


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: