Dropping 10* only those that live in serious heat can relate.
06-01-2018, 10:01 AM
#22
My preferred coolant when I lived in Florida was 2:1 water to antifreeze, plus water wetter. In North Georgia, I run closer to 3:2 (60/40). More water + water wetter will shed heat better.
Are you running stock engine, stock tune? Any mods at all?
The fan activation temps are stupid high on these cars. Having a tuner knock the fan "turn on" and "turn off" temps down 10°F to 15°F below the stock values also helps keep the thing cooler.
Are you running stock engine, stock tune? Any mods at all?
The fan activation temps are stupid high on these cars. Having a tuner knock the fan "turn on" and "turn off" temps down 10°F to 15°F below the stock values also helps keep the thing cooler.
Actually it has never reached 220* and has never over heated. 215 isn’t a problem but believe the engine would benifit more running a little cooler.
06-01-2018, 10:18 AM
#23
Race Director
Member Since: Mar 2006
Location: Everywhere and Nowhere at all
Posts: 15,357
Received 1,679 Likes
on
1,135 Posts
I am sure he did.... 210 is on the high side in traffic.... This is also w the AC blaring...
stock tune for now. Heads milled .020, some street porting and an intake. Nothin too crazy.
210? I’m 5* degrees higher. Only difference is your Tstat opens faster. Maybe your tuner adjusted the fans?
Actually it has never reached 220* and has never over heated. 215 isn’t a problem but believe the engine would benifit more running a little cooler.
stock tune for now. Heads milled .020, some street porting and an intake. Nothin too crazy.
210? I’m 5* degrees higher. Only difference is your Tstat opens faster. Maybe your tuner adjusted the fans?
Actually it has never reached 220* and has never over heated. 215 isn’t a problem but believe the engine would benifit more running a little cooler.
06-01-2018, 10:32 AM
#24
As long as I go no AC between 215-220 with temps in the 90’s. Are you getting any slow crank/no crank after your starter is heat soaked? I haven’t had a no crank yet but several sloooow cranks. As for the prospeed....yeah it’s damn sure not cheap, but for what you I’ve neen told it’s the only one that works as advertised. One of the main selling points of th prospeed is the shroud design and the wiring system hit them up for an in-depth explanation I wouldn’t do it justice
Last edited by 73DBG; 06-01-2018 at 12:24 PM. Reason: Grammer
06-01-2018, 10:39 AM
#25
Le Mans Master
06-01-2018, 10:49 AM
#26
Race Director
Member Since: Sep 2007
Location: Peoria/Phoenix AZ
Posts: 16,555
Received 2,061 Likes
on
1,505 Posts
C6 of Year Finalist (performance mods) 2019
This is where you start to be concerned.
06-01-2018, 10:57 AM
#27
Race Director
I've driven in heavy traffic here in Vegas @115º and coolant never went over 220º. Factory stat and radiator. The fan will run at a higher speed with the AC turned on so turning it off will probably not be beneficial in any way.
The following users liked this post:
TXGS507 (06-01-2018)
06-01-2018, 10:57 AM
#28
Melting Slicks
My "06 Z is at 661 HP with heads milled by AHP .030. I'm running a Dewitts radiator coupled with a D3 fan set up (best one out there) and a 160 T-stat. It gets very hot & humid here in SW FL just like you and my temps so far have never cracked 200. I have my fans tuned to come on at 60% speed at 192 degrees.
The following users liked this post:
D3PE (06-04-2018)
06-01-2018, 10:58 AM
#29
I hit upper 230's in traffic with the A/C on when we get that hot....hit 240 with that Vararam and heavy traffic
06-01-2018, 11:14 AM
#30
Melting Slicks
I live in Corpus Christi, Tx. I was having issues with heat prior to installing Dewitts. Now no issues. My mister is close to 70/30 distilled water and coolant with water wetter. OEM fan set up.
06-01-2018, 11:31 AM
#31
Safety Car
I'll repeat my recommendation to have a tuner adjust the fan activation and shutoff temps.
I'd never recommend a 160° thermostat for these things. Even with proper tuning, those things are a little cool for my tastes. And nobody ever completely tunes for a 160°F thermostat.
I doubt you'll have temps as high after adjusting the fan temps downward. We didn't on the C6 I take care of.
The next step that I'd consider would be a 180°F thermostat and a very thorough tune to match. The tune should include adjusting the fueling maps based on ECT to target an operating temperature in line with the new thermostat. Without those adjustments, a 180°F thermostat can actually increase under hood temps, and it's very hard on the catalytic converters.
I'd never recommend a 160° thermostat for these things. Even with proper tuning, those things are a little cool for my tastes. And nobody ever completely tunes for a 160°F thermostat.
I doubt you'll have temps as high after adjusting the fan temps downward. We didn't on the C6 I take care of.
The next step that I'd consider would be a 180°F thermostat and a very thorough tune to match. The tune should include adjusting the fueling maps based on ECT to target an operating temperature in line with the new thermostat. Without those adjustments, a 180°F thermostat can actually increase under hood temps, and it's very hard on the catalytic converters.
Last edited by C6_Racer_X; 06-01-2018 at 11:31 AM.
06-01-2018, 11:38 AM
#32
if his tune already has fan speed and temp adjusted than turning the AC will more than likely raise temps, if I run the AC I’m 10-15 degrees hotter on coolant temps. My Z is blown though. I’m definitely far from an LS7 expert I only know this because I read other threads saying keep the AC or use the recirculating function to help lower temps and it did the opposite on my car
06-01-2018, 12:06 PM
#33
Race Director
if his tune already has fan speed and temp adjusted than turning the AC will more than likely raise temps, if I run the AC I’m 10-15 degrees hotter on coolant temps. My Z is blown though. I’m definitely far from an LS7 expert I only know this because I read other threads saying keep the AC or use the recirculating function to help lower temps and it did the opposite on my car
06-01-2018, 12:36 PM
#34
Team Owner
There is room for improvement but 220 is nothing. Even 230.
06-01-2018, 12:47 PM
#35
Stock fans, stock radiator, A/C on and 111* air temps ......
06-01-2018, 02:04 PM
#36
Stock fans, stock radiator, A/C on and 111* air temps ......
https://www.youtube.com/watch?v=nKZV...T_3iww&index=9
https://www.youtube.com/watch?v=nKZV...T_3iww&index=9
lighy to light. It can reach 215 with AC blaring, doesn’t go over that. No biggie lots of great ideas and suggestions in this thread.
Last edited by JesC6Z; 06-01-2018 at 02:05 PM.
06-01-2018, 07:51 PM
#37
Drifting
In 85-90 deg humid weather, I’m seeing 208 deg coolant temps in traffic with AC on and with a blower car. The Prospeed fans work well.
06-01-2018, 11:39 PM
#38
Le Mans Master
06-01-2018, 11:47 PM
#39
06-01-2018, 11:52 PM
#40
Well after reading the home page it is nothing like wetter water. Seems a little to good to be true. Have you used this in your vette? Or are you currently using it? I’m a bit skeptical about a product saying it’s a one time buy and last the lifetime of your motor especially an LS7 or any high performance motor for that matter. I’m gonna keep reading the site though.....
Last edited by 73DBG; 06-01-2018 at 11:53 PM. Reason: Sp