help ! easy question
help ! easy question i know this isnt the right section for this post but im just looking for a simple answer . i just put in a 160 thermostat i purchased from a guy on ls1 tech i put it in followed directions and took my predator and turned fans on earlier and it is only getting 10 to 15 degrees cooler than my factory 210. anything i can do . 
i just found out every ls1 but 98 year has a crappy dummy guage in the car. i was getting pissed was gonna start throwing stuff at it then i cooled down, and read some stuff on the net. i was used to my 98 when i changed to 160 on that car it read correct it went to like 180 and sat there . but ohh well long as the car is running colder im happy . the only thing that guage is good for now is if i ever overheat.
by the way i have my fan1 to come on at 163 and off at 160 and fan2 on 166 off at 161 does that sound ok or maybe i should go a little higher.
hey crazy man my name is tim to what a small world lol
by the way i have my fan1 to come on at 163 and off at 160 and fan2 on 166 off at 161 does that sound ok or maybe i should go a little higher.
hey crazy man my name is tim to what a small world lol
Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
Originally Posted by 2001z
by the way i have my fan1 to come on at 163 and off at 160 and fan2 on 166 off at 161 does that sound ok or maybe i should go a little higher.
thats why i am asking normal operating temp wont be 210 rev becouse i have a 160 now it should go as high as 180 and stop . im just wondering if i should set them up at 170 or so .
Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
I'm not one of those who subscribes to the theory that the colder you can run your engine, the better. My general estimate - and others may want to modify these numbers - is that good "normal operating temp" for an LS1 is about 185-215. Try this link and scroll down to the bottom of the page for some interesting discussion http://www.vincihighperformance.com/...20PAGE%20.HTML .
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Teching In
Joined: Feb 2005
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Of course the cooler your engine runs, the better. I mean, I'm sure there is a limit, but it is well below 160 degrees. The cooler your engine runs, the better the combustion is (= more hp) and the longer the life of your engine. I have a 160 degree Hypertech thermostat in my 98 ls1, and a superchips programmer to program my fans to come on at 160 degrees. Yes my fans run near constantly, but so what, they are electric and don't consume horsepower when they are running. My engine runs all the time between 160 and 170 degrees, even when it is 100 degrees outside. It is quite possible that you have a 180 degree thermostat if you are not getting any cooler than you are.
Hope it helps,
Jeff
Hope it helps,
Jeff
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Verdad Gallardo Joined: Nov 2003
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From: Wichita KS / Rancho San Diego
Originally Posted by Z28_1998
Of course the cooler your engine runs, the better. I mean, I'm sure there is a limit, but it is well below 160 degrees. The cooler your engine runs, the better the combustion is (= more hp) and the longer the life of your engine. Yes my fans run near constantly, but so what, they are electric and don't consume horsepower when they are running. Jeff
Whether you coolant temp is 180* or 210*, the PCM is going to try and keep the a/f at 14.7:1 in closed loop and it is going to use the PE table when WOT, so how is it going to run richer with a lower coolant temp? I think GM uses the higher temp t-stats and fan temps for emission purposes.
I don't think I've ever seen less than 178* running temps logging with 160* t-stat equipped cars. I think they are good to use and have them in both of my cars. I use these fan settings for 160* t-stats.
Fan1 - on/off - 184/175
Fan2 - on/off - 194/185
I don't think I've ever seen less than 178* running temps logging with 160* t-stat equipped cars. I think they are good to use and have them in both of my cars. I use these fan settings for 160* t-stats.
Fan1 - on/off - 184/175
Fan2 - on/off - 194/185
Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
I'm not disputing using a 160* stat. Your settings seem reasonable. My comments were directed to his having the fan settings basically at thermostat temp, and then to the notion that "the cooler the better," as if running your car at 140 would be desirable. Doesn't the PCM command enrichment of the mixture up to "operating temp" - whatever that is? There is more involved than just emissions - fuel economy, oil life, the thermal efficiency of aluminum, etc. - all these factor in.
Last edited by RevGTO; Sep 4, 2005 at 12:20 AM.
On The Tree
Joined: Sep 2004
Posts: 143
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From: St. Clair
I've had them all...Factory thermostat ran right at 192 degrees...180 degree thermostat run at 187 degrees...160 degree thermostat holds at 174 degrees...
With the 160 degree thermostat, I have my fan 1 to come on at 186 and off at 180, fan 2 set to come on 188 and off at 180...
Peace...Gman
With the 160 degree thermostat, I have my fan 1 to come on at 186 and off at 180, fan 2 set to come on 188 and off at 180...
Peace...Gman
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
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From: BFE
160 stat does not mean 160 engine temps.
It only means that the thermo will open coolant flow at 160, that is all.
I agree with the above statement that LSx motors should run between 180>210 as that is their efficiency running temps.
The comment about running rich is also true.
It only means that the thermo will open coolant flow at 160, that is all.
I agree with the above statement that LSx motors should run between 180>210 as that is their efficiency running temps.
The comment about running rich is also true.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Thermal combustion efficiency
In Lehman terms, your motor will run mostly in closed loop due to the pcm not reading proper efficient temps. (Kinda like a choke mode), that will make it run rich.
The other reason not to run too cold of a motor on the street is that your oil becomes contaminated with H2O particles from the ambient air/dew/humidity.
It needs to reach water boiling temps for it to evaporate and allow the oil to operate at full viscosity capabilities.
In Lehman terms, your motor will run mostly in closed loop due to the pcm not reading proper efficient temps. (Kinda like a choke mode), that will make it run rich.
The other reason not to run too cold of a motor on the street is that your oil becomes contaminated with H2O particles from the ambient air/dew/humidity.
It needs to reach water boiling temps for it to evaporate and allow the oil to operate at full viscosity capabilities.
Last edited by PREDATOR-Z; Sep 4, 2005 at 01:16 PM.