Coolant Temps with DeWitts EOC Radiator?
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,469
Likes: 716
From: Black Forest CO
Coolant Temps with DeWitts EOC Radiator?
I previously had a non-EOC DeWitts radiator in my car cooling my 427. Coolant temps were 186 to 190s cruising down the road in the summer. and slightly over 200 in traffic. This was with a 170 Vinci thermostat.
I now have a DeWitts with EOC in the car. The 170 stat croaked so I replaced it with 180 LPE stat when I put the EOC radiator in. My coolant temps were then 221 to 223 cruising down the road with ambient temos in the 50s. When I stopped the coolant temp would drop into the upper 190s. I figured that I must have gotten a bad stat from LPE so I bought a SLP 160 degree stat. Now my coolant temp is now 205 to 207 cruising down the road and the 192ish when stopped and idling. this seems backwards to me.
I talked to Tom and he assured me that this is normal.
My question for those of you with a DeWitts EOC radiator is what do your coolant temps run at?
I now have a DeWitts with EOC in the car. The 170 stat croaked so I replaced it with 180 LPE stat when I put the EOC radiator in. My coolant temps were then 221 to 223 cruising down the road with ambient temos in the 50s. When I stopped the coolant temp would drop into the upper 190s. I figured that I must have gotten a bad stat from LPE so I bought a SLP 160 degree stat. Now my coolant temp is now 205 to 207 cruising down the road and the 192ish when stopped and idling. this seems backwards to me.
I talked to Tom and he assured me that this is normal.
My question for those of you with a DeWitts EOC radiator is what do your coolant temps run at?
Drifting
Joined: Jan 2004
Posts: 1,419
Likes: 6
From: Alamosa CO
Mark,
I have tha same DeWitts radiator/Eoc as you, and I just got back from Phoenix with the car. Temps down there with the air temps in the high 70's and low 80's were running around 178 on the freeway and 185 or so around town in traffic. I am running a 160 stat with the fan on and off temps programmed accordingly. Hope this helps.
Jimbo
I have tha same DeWitts radiator/Eoc as you, and I just got back from Phoenix with the car. Temps down there with the air temps in the high 70's and low 80's were running around 178 on the freeway and 185 or so around town in traffic. I am running a 160 stat with the fan on and off temps programmed accordingly. Hope this helps.
Jimbo
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,469
Likes: 716
From: Black Forest CO
Thanks Jimbo.
I know that I am putting more heat onto the coolant with the EOC in there but it seems like it is running too darned hot.
I fully expected temps like what you are seeing. It seems to me that my coolant temp is about 20 degrees higher than it should be.
I know that I am putting more heat onto the coolant with the EOC in there but it seems like it is running too darned hot.
I fully expected temps like what you are seeing. It seems to me that my coolant temp is about 20 degrees higher than it should be.
Former Vendor
Joined: Jan 2000
Posts: 5,593
Likes: 631
From: Brighton
Without EOC the range was 186-200+
with EOC it is 192-207
It looks like the eoc added 5-7 degrees which is understandable. I don't see running 20 degrees cooler, that would be 15 cooler than you were without the eoc.
Burning Brakes
Joined: Jan 2006
Posts: 1,226
Likes: 45
From: Castleton VA
Cruise-In VIII Veteran
I think what you are seeing here is the flow characteristics of the stat and not the radiator. Based on your numbers you had
Without EOC the range was 186-200+
with EOC it is 192-207
It looks like the eoc added 5-7 degrees which is understandable. I don't see running 20 degrees cooler, that would be 15 cooler than you were without the eoc.
Without EOC the range was 186-200+
with EOC it is 192-207
It looks like the eoc added 5-7 degrees which is understandable. I don't see running 20 degrees cooler, that would be 15 cooler than you were without the eoc.
He sez that before, he ran cooler when cruising than when sitting (makes sense, more airflow through the rad), and now he's hotter cruising than when sitting. Any idea why? Doesn't make any intuitive sense to me, but I'm not on site to verify reported temps, eyeball the installation, etc.
Curious on the Right Coast.
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,469
Likes: 716
From: Black Forest CO
Thanks Tom.
I don't understand 2 things now. One is the running hotter while at steady state (50-55 mph) and cooler in traffic. I have never seen a vehicle that I have owned do that.
the other item is the temps that ZOOMZ06 is seeing. That is what I expected. Why would his run 27-29 degrees cooler than mine? We have the same EOC radiator model purchased at the same time and the same temp thermostat.
I don't understand 2 things now. One is the running hotter while at steady state (50-55 mph) and cooler in traffic. I have never seen a vehicle that I have owned do that.
the other item is the temps that ZOOMZ06 is seeing. That is what I expected. Why would his run 27-29 degrees cooler than mine? We have the same EOC radiator model purchased at the same time and the same temp thermostat.
Drifting
Joined: Apr 2008
Posts: 1,316
Likes: 2
From: St. Louis Mo
Thanks Tom.
I don't understand 2 things now. One is the running hotter while at steady state (50-55 mph) and cooler in traffic. I have never seen a vehicle that I have owned do that.
the other item is the temps that ZOOMZ06 is seeing. That is what I expected. Why would his run 27-29 degrees cooler than mine? We have the same EOC radiator model purchased at the same time and the same temp thermostat.
I don't understand 2 things now. One is the running hotter while at steady state (50-55 mph) and cooler in traffic. I have never seen a vehicle that I have owned do that.
the other item is the temps that ZOOMZ06 is seeing. That is what I expected. Why would his run 27-29 degrees cooler than mine? We have the same EOC radiator model purchased at the same time and the same temp thermostat.
Drifting
Joined: Dec 1999
Posts: 1,541
Likes: 2
From: Raleigh NC
Any chance you have air in the system? I am running the same radiator and my coolant temps never get above 190 unless I am on the track. This holds true for my recently installed LS3 416. The temps are always higher sitting still than cruising at 50mph. Sometimes it can be difficult to burp these things.
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Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,469
Likes: 716
From: Black Forest CO
I have drained and refilled the system twice. I had a local shop use some cooling system pressure thing that they have to get any air out. I have tried both a new 180 stat and a 160 stat.
I have drained/filled the cooling system in this car 12 or 15 times and never had a problem with air in the system.
This problem just does not make sense to me.
I have drained/filled the cooling system in this car 12 or 15 times and never had a problem with air in the system.
This problem just does not make sense to me.
Any chance you have air in the system? I am running the same radiator and my coolant temps never get above 190 unless I am on the track. This holds true for my recently installed LS3 416. The temps are always higher sitting still than cruising at 50mph. Sometimes it can be difficult to burp these things.
Drifting
Joined: Apr 2008
Posts: 1,316
Likes: 2
From: St. Louis Mo
I have drained and refilled the system twice. I had a local shop use some cooling system pressure thing that they have to get any air out. I have tried both a new 180 stat and a 160 stat.
I have drained/filled the cooling system in this car 12 or 15 times and never had a problem with air in the system.
This problem just does not make sense to me.
I have drained/filled the cooling system in this car 12 or 15 times and never had a problem with air in the system.
This problem just does not make sense to me.
Instructor
Joined: May 2007
Posts: 175
Likes: 0
Thanks Tom.
I don't understand 2 things now. One is the running hotter while at steady state (50-55 mph) and cooler in traffic. I have never seen a vehicle that I have owned do that.
the other item is the temps that ZOOMZ06 is seeing. That is what I expected. Why would his run 27-29 degrees cooler than mine? We have the same EOC radiator model purchased at the same time and the same temp thermostat.
I don't understand 2 things now. One is the running hotter while at steady state (50-55 mph) and cooler in traffic. I have never seen a vehicle that I have owned do that.
the other item is the temps that ZOOMZ06 is seeing. That is what I expected. Why would his run 27-29 degrees cooler than mine? We have the same EOC radiator model purchased at the same time and the same temp thermostat.
My car does the same thing. My oil temps hit 215 to 220 when running down the interstate at say 60 to 70 MPH, but it runs much cooler in traffic. I have a Dewits with the trans cooler. I am currently going to aftermarket fans, and an EOC and ETC, both bar and plate with fans.
When driving over 55 MPH i can watch my oil temps rise, and soon after the coolant temps start to follow, but never getting over mid 190s.
Alot of this is due to the supercharger and the location of my intercooler and radiator. But I am in the process of picking the radiator back up (close to strait up and down) adding the trans and oil cooler and reclocating my intercooler.
Alot of work, but hopefully wil add som life to my engine and trans. At veryleast itwill give me some piece of mind when it runs cooler.
LionelC
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,469
Likes: 716
From: Black Forest CO
Former Vendor
Joined: Jan 2000
Posts: 5,593
Likes: 631
From: Brighton
I did suggest an answer, and that was different flow characteristics of the thermostat.
Many people have reported higher temps when at high speeds and that could be due to the increase hp it takes to go faster and/or timing. You work harder when you jog vs walking, and so does the car.
Radiators are pretty simple devices and there isn't a lot of variables that can change with one, except for the obvious degrading from crud.
Motors on the other hand have numberous variables that can affect heat generation and the final temperature. That includes ambient temps, coolant water ratio, pump flow, air flow, stat, timing and tuning.
In the end, these numbers don't sound bad at all and I see no reason to be concerned.
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,469
Likes: 716
From: Black Forest CO
I guess that I will have to get a male-male -10 AN coupler and bypass the EOC.
If the temp drops then the EOC is causing the temperature rise.
If the temp does not drop it there is some other problem.
The tune is the same on that I ran all last summer. The only things that have been changed is a regular DeWitts to an EOC DeWitts and a dead 170 thermostat to both a 180 and a 160 stat.
If the temp drops then the EOC is causing the temperature rise.
If the temp does not drop it there is some other problem.
The tune is the same on that I ran all last summer. The only things that have been changed is a regular DeWitts to an EOC DeWitts and a dead 170 thermostat to both a 180 and a 160 stat.
Last edited by 7LitreC5; Mar 17, 2009 at 06:40 PM.
Burning Brakes
Joined: Jan 2008
Posts: 911
Likes: 1
From: mobile alabama
i to am working cooling issues,
i found out the fans cut out at 45 mph.i have mine come on at 160 deg,both,and stay on.if you turn on the a/c and try it at 55 mph this keeps them on.i will say the air dam makes a difference.we have experimented to make what i have.i wish i had your problem at stop or low speed instead of the opposite.
has for my car ,i have two 12" spals ,160 them,20%dextron,two bottle wetter and the rest water.i have a 6 qt. aluminum expansion tank in the battery tray.
mine runs 185-189 down the road and 205 w/a/c.
at idle and in traffic it climbs up slowly.234 deg is were i start to freak out.i have read and run it at 260+ with no damage.
i am looking for a radiator now,
ps i will try the tape idea,sometimes it is the simple stuff
lxW=aprox HP,as told by mike at Howe racing.
looking at a cross flow dual pass if i can make it work,31x19x3 w/cooler,no fill neck.i got a threaded neck for the expansion tank.so i use the factury cap.
any ideas on a radiator would help me.
mike in mobile
i found out the fans cut out at 45 mph.i have mine come on at 160 deg,both,and stay on.if you turn on the a/c and try it at 55 mph this keeps them on.i will say the air dam makes a difference.we have experimented to make what i have.i wish i had your problem at stop or low speed instead of the opposite.
has for my car ,i have two 12" spals ,160 them,20%dextron,two bottle wetter and the rest water.i have a 6 qt. aluminum expansion tank in the battery tray.
mine runs 185-189 down the road and 205 w/a/c.
at idle and in traffic it climbs up slowly.234 deg is were i start to freak out.i have read and run it at 260+ with no damage.
i am looking for a radiator now,
ps i will try the tape idea,sometimes it is the simple stuff
lxW=aprox HP,as told by mike at Howe racing.
looking at a cross flow dual pass if i can make it work,31x19x3 w/cooler,no fill neck.i got a threaded neck for the expansion tank.so i use the factury cap.
any ideas on a radiator would help me.
mike in mobile
Tech Contributor
Joined: Oct 1999
Posts: 41,013
Likes: 9,775
From: Charlotte, NC (formerly Endicott, NY)
If you aren't cooling the oil in the EOC you are then transfering the heat from the oil to the coolant in the block and then cooling that in the radiator. The heat has to go somewhere. As for coolant temps I am always more concerend about engine oil temp Vs coolant temps. The damage comes when the engine oil gets too hot.
Bill
Bill
Burning Brakes
Joined: Jan 2008
Posts: 911
Likes: 1
From: mobile alabama
just bought a Howe 28.375x16x3 ,2 rows per" ,no filler neck,oil cooler,the core is 2.250 thick and is a cross flow.this is so i can move it back away from the .25" inter cooler clearance i have now.i all so found out that when i changed the factory fans out i needed to shroud off the back side were the new fans are.
i think i get it now.i will add the Evans R 400* waterless.
mike
i think i get it now.i will add the Evans R 400* waterless.
mike
Burning Brakes
Joined: Jan 2008
Posts: 911
Likes: 1
From: mobile alabama
you mean the Evans?
i saw that,
280* to cook out the remaining water?
i will blow out what i can with air and then,if i have to do the plugs.
i did speak to an expert at Evans and he answered my questions and offered up advice.i have over heated three or four times and towed home once.all when i am out hard driving,boosting over 100 mph for extended time.my sys. seems to gather heat and not dissipate it well.
i have two gal. of prep and three race 400.the new radiator and shroud that I'll make.hoping for 200* with a/c on all the time.
the Dewitt is a nice piece for a swap.i needed a universal for a custom install.
i saw that,
280* to cook out the remaining water?
i will blow out what i can with air and then,if i have to do the plugs.
i did speak to an expert at Evans and he answered my questions and offered up advice.i have over heated three or four times and towed home once.all when i am out hard driving,boosting over 100 mph for extended time.my sys. seems to gather heat and not dissipate it well.
i have two gal. of prep and three race 400.the new radiator and shroud that I'll make.hoping for 200* with a/c on all the time.
the Dewitt is a nice piece for a swap.i needed a universal for a custom install.