Highest Coolant Temps?
Racer
Joined: Feb 2009
Posts: 272
Likes: 0
From: H_TOWN WETNBLOWN
Melting Slicks
Joined: Jul 2008
Posts: 2,014
Likes: 2
St. Jude Donor '09-'10
My culprit is the Diamond forged cylinders I just added. I was well within 200-210 @ 600 RWHP via my Procharger D1SC and just the Dewitts.
I think I should add an external tranny cooler to take some pressure of the Dewitts combination radiator.
Last edited by CPG1962; Jul 4, 2009 at 09:32 AM.
Pro
Joined: Sep 2006
Posts: 729
Likes: 0
From: Oceanside N.Y./ Boynton Beach Fl.
So this morning I took a ride at about 3:30 a.m. Outside air was about 65. Coolant temps while driving around town never went above 180! The other day with temps around 85 I saw coolant temps of 237 in stop and go traffic. I hope the DeWitts radiator and vented hood helps. I guess if I was doing it all over again I would do the radiator when I did the blower.
Safety Car
Joined: Nov 2005
Posts: 3,835
Likes: 5
From: Grand Junction Colorado
Make sure nothing is pushing the your inner cover down againt the ac condensor.It really slows airflow down.We had one last week that had popped the 2 plastic pins out of the front bumber support and laid it down on top of the ac condensor.We saw a 10 degree drop in temps after we fixed it.
Thread Starter
Instructor
Joined: Aug 2006
Posts: 231
Likes: 0
How new is your forged block? I just added Diamond Forged Cylinders and my SC car temp went from average 210 (after spirted driving) to 230. I have been told the break-in on forged cylinders is 5K miles 
. from a VERY trustworthy source. I am running Rotella break-in oil for the 1st 5K miles and the (thank God) switching back to Royal Purple. I should then see my temps drop back to close to normal levels.
. from a VERY trustworthy source. I am running Rotella break-in oil for the 1st 5K miles and the (thank God) switching back to Royal Purple. I should then see my temps drop back to close to normal levels.Bill
Racer
Joined: Jul 2007
Posts: 264
Likes: 0
From: Southern New Mexico
great thread that raises questions
Just got my A@A installed with stock radiator. THe shop said they were afraid to put the 160 stat in because I might not get enough heater in the winter??????? Havent heard this before- have any of you? When on the highway in 113 degrees I am running 203 but in traffic stop and go it went to 225 and a/c started cutting in/out. Am running purple ice already. How hot do we let things get before we worry, damage, or overheat???
The shop told me to let them know how things went, but at what point do we change?
THanks
The shop told me to let them know how things went, but at what point do we change?THanks
Thread Starter
Instructor
Joined: Aug 2006
Posts: 231
Likes: 0
Just got my A@A installed with stock radiator. THe shop said they were afraid to put the 160 stat in because I might not get enough heater in the winter??????? Havent heard this before- have any of you? When on the highway in 113 degrees I am running 203 but in traffic stop and go it went to 225 and a/c started cutting in/out. Am running purple ice already. How hot do we let things get before we worry, damage, or overheat??? The shop told me to let them know how things went, but at what point do we change?
THanks
The shop told me to let them know how things went, but at what point do we change?THanks
Most of the time while in traffic it stays between 218-225. that was with the outside air temp reading 108. I think once I get the engine broken in good, and I can go synthetic on the oil it will drop further.Bill
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Safety Car
Joined: Sep 2007
Posts: 3,502
Likes: 82
Just got my A@A installed with stock radiator. THe shop said they were afraid to put the 160 stat in because I might not get enough heater in the winter??????? Havent heard this before- have any of you? When on the highway in 113 degrees I am running 203 but in traffic stop and go it went to 225 and a/c started cutting in/out. Am running purple ice already. How hot do we let things get before we worry, damage, or overheat??? The shop told me to let them know how things went, but at what point do we change?
THanks
The shop told me to let them know how things went, but at what point do we change?THanks
Sample F/I fan compared to stock profiles are below. See how much more aggressive the fan speeds are in the second chart? This example is very aggressive and some might not like the fan noise at 90% so early but this is entirely tweak-able. The real takeaway is that the stock settings don't even hit 50% fan until >214 degrees!
Last edited by Motorhead-47; Jul 10, 2009 at 05:40 PM.
Racer
Joined: Jul 2007
Posts: 264
Likes: 0
From: Southern New Mexico
I don't know what the fan speeds were set at, but i do know they kick on at 200 but i couldn't tell you at what percentage. I will ask them. I dont live in the desert, but at 6000ft. we have 4 real seasons, 100 is rare in summer but happens, winter is to 0 but I dont take her out below 30 unless I get caught out. Does any of this make a difference?
Safety Car
Joined: Sep 2007
Posts: 3,502
Likes: 82
I based my reply on your comment above...assumed you were low desert. If you are driving in 113 degree weather regularly I'd change the t-stat and fan settings.
Safety Car
Joined: Sep 2007
Posts: 3,502
Likes: 82
I feel your pain. I lived in Tucson for 7 years. That heat can be brutal in the summer and in traffic with the a/c working hard and the added thermal impact of the intercooler and s/c unit you were really pushing things hard. I'd consider that a rare extreme unless you regularly visit Tucson. If you do, consider at least having the fan speeds modified to be more aggressive. The a/c was cutting out because you were exceeding it's high pressure limits due to the high ambient air temp and the condenser's inability to keep the a/c system temps in check. It shuts down the ac compressor to keep things from going high order (damaging the compressor or hoses or fitting/o-rings).
I once had an air conditioner hose blow in Tucson while sitting at the drive-thru window at McDonald's..scared the crap out of me and the kid who had his head hanging out the window with my Big Mac!
I once had an air conditioner hose blow in Tucson while sitting at the drive-thru window at McDonald's..scared the crap out of me and the kid who had his head hanging out the window with my Big Mac!
Last edited by Motorhead-47; Jul 10, 2009 at 06:35 PM.
Burning Brakes
Joined: Jan 2008
Posts: 922
Likes: 1
From: Columbus Ohio
What is the set up on the car? Blower, TT, N20? This is vary some decision, on how to properlly cool the system, mainly on the placement of the intercoolers, and seperate oil and or trans coolers that may be installed.
What thermostat?
When do the fans come on?
Does the temperature seem to want to still climb further after 239?
Is the system bleed properlly?
AC on?
What are the oil temps during this period?
I could ask a lot more questions, but don't just assume a bigger radiator is your only fix, there may be multiple things that are causing the extra heat in the cooling system. If you go into more detail , that will allow me an other members to give better more accurate feedback. Your always welcome to email myself as well, ill reply via blackberry if I am not in the shop.
Good luck
-Brandon
What thermostat?
When do the fans come on?
Does the temperature seem to want to still climb further after 239?
Is the system bleed properlly?
AC on?
What are the oil temps during this period?
I could ask a lot more questions, but don't just assume a bigger radiator is your only fix, there may be multiple things that are causing the extra heat in the cooling system. If you go into more detail , that will allow me an other members to give better more accurate feedback. Your always welcome to email myself as well, ill reply via blackberry if I am not in the shop.
Good luck
-Brandon
Racer
Joined: Jul 2007
Posts: 264
Likes: 0
From: Southern New Mexico
What is the set up on the car? Blower, TT, N20? This is vary some decision, on how to properlly cool the system, mainly on the placement of the intercoolers, and seperate oil and or trans coolers that may be installed.
What thermostat?
When do the fans come on?
Does the temperature seem to want to still climb further after 239?
Is the system bleed properlly?
AC on?
What are the oil temps during this period?
I could ask a lot more questions, but don't just assume a bigger radiator is your only fix, there may be multiple things that are causing the extra heat in the cooling system. If you go into more detail , that will allow me an other members to give better more accurate feedback. Your always welcome to email myself as well, ill reply via blackberry if I am not in the shop.
Good luck
-Brandon
What thermostat?
When do the fans come on?
Does the temperature seem to want to still climb further after 239?
Is the system bleed properlly?
AC on?
What are the oil temps during this period?
I could ask a lot more questions, but don't just assume a bigger radiator is your only fix, there may be multiple things that are causing the extra heat in the cooling system. If you go into more detail , that will allow me an other members to give better more accurate feedback. Your always welcome to email myself as well, ill reply via blackberry if I am not in the shop.
Good luck
-Brandon
Hope this helps. thanks.
Instructor
Joined: Oct 2007
Posts: 116
Likes: 0
From: middle east
i am getting 221
to 230 while driving between houses and traffic lights
with crousing i get 197
using thermostat 160
but temp get in my country up to 122 !!! 50 Celisius
i am working to Fit electric water pump in in my car ,, + biggers fans with higher CFM
or getting Extra Fan and fit it in my car ,, with external Switch
to 230 while driving between houses and traffic lights
with crousing i get 197
using thermostat 160
but temp get in my country up to 122 !!! 50 Celisius
i am working to Fit electric water pump in in my car ,, + biggers fans with higher CFM
or getting Extra Fan and fit it in my car ,, with external Switch
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
I rarely crack 200 even in 100'+ heat and stop and go traffic. I have a 160' t-stat and I do also have the 2 bar HP Tuners OS which extends the fan table down to 163' and I have mine set to come on full bore (90%) at 180'.
BTW, if you put anything greater than 24% in the 192 column of the stock fan table the fans stay on all the time.
BTW, if you put anything greater than 24% in the 192 column of the stock fan table the fans stay on all the time.
Burning Brakes
Joined: Jan 2008
Posts: 922
Likes: 1
From: Columbus Ohio
setup is 07 z51 mn6 stock radiator with purple ice, v2si trim A@A LT jet hot headers, 3"Xpipe, high flow cats, exhaust. T-stat as I noted earlier is stock--they didnt want to install the 160 stat because they thought i would lose my heater in winter. Fans come on at 200. temp has never been over 225--I got worried and turned off a/c and luckily hit highway soon after. oil temps always 220 never over even on high pulls.
Hope this helps. thanks.
Hope this helps. thanks.
Sounds like honestly its just a thermostat issue, I would really push for the 160 degree thermostat. And I would be willing to bet you loose no heat either, just let you car warm up properly, which is important in the winter as well in order to get the oil to proper visciosity properties.
I wonder if the intercooler is'nt trapping heat in front of the radiator and ac condenser as well, causing the heat to climb when the A/C is on.
-Brandon