!!!! I was thinking of having that Radiator but I think I will go with the dual fans instead 
Dewitt's radiator
Thread Starter
Le Mans Master
Joined: Feb 2007
Posts: 5,481
Likes: 23
From: Danville Ca.
St. Jude Donor '10
Dewitt's radiator
So I added a Dewitt's radiator in my crammed 08 LS7. To my surprise the car is running hotter and there is a 10-12 swing in temps. Before the Dewitt's the car ran 192-196 now it is running 190-203. The car does have a160 degree stat in it and it's tuned for it also.
Any thoughts?
Any thoughts?
Instructor
Joined: Jan 2011
Posts: 214
Likes: 0
From: Des Moines, Iowa
My car also has a 160* thermostat and a Dewitt's radiator and I see 180* temps on the highway, and up to 240* on the road course on a really hot day. I had my tuner set the fans for mid 180s though, so I don't expect to run cooler than that.
Are you running oil cooler lines through the radiator? I see mine has extra holes for that but I'm only running coolant through mine.
My thoughts are that it will cool better when pushing the car hard, but under normal circumstances it won't make that much difference. Are you sure the tuner set the fans to turn on at 160*?
Are you running oil cooler lines through the radiator? I see mine has extra holes for that but I'm only running coolant through mine.
My thoughts are that it will cool better when pushing the car hard, but under normal circumstances it won't make that much difference. Are you sure the tuner set the fans to turn on at 160*?
Thread Starter
Le Mans Master
Joined: Feb 2007
Posts: 5,481
Likes: 23
From: Danville Ca.
St. Jude Donor '10
My car also has a 160* thermostat and a Dewitt's radiator and I see 180* temps on the highway, and up to 240* on the road course on a really hot day. I had my tuner set the fans for mid 180s though, so I don't expect to run cooler than that.
Are you running oil cooler lines through the radiator? I see mine has extra holes for that but I'm only running coolant through mine.
My thoughts are that it will cool better when pushing the car hard, but under normal circumstances it won't make that much difference. Are you sure the tuner set the fans to turn on at 160*?
Are you running oil cooler lines through the radiator? I see mine has extra holes for that but I'm only running coolant through mine.
My thoughts are that it will cool better when pushing the car hard, but under normal circumstances it won't make that much difference. Are you sure the tuner set the fans to turn on at 160*?
Instructor
Joined: Jan 2011
Posts: 214
Likes: 0
From: Des Moines, Iowa
I would check, maybe he left them to turn on at 190*. I know when talking with my tuner about it he didn't want to have them turn on at 160 otherwise they'd be running all the time unnecessarily.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Dewitts Radiator has never really seemed like a great mod. If you want to run cooler just run more water and water wetter (or a similar product).
You may have told your tuner to set the fans to come on at mid 180s, but besides being unnecessary I also believe it's impossible. I think the lowest turn-on temp for the fans is hard coded at 192.
My car also has a 160* thermostat and a Dewitt's radiator and I see 180* temps on the highway, and up to 240* on the road course on a really hot day. I had my tuner set the fans for mid 180s though, so I don't expect to run cooler than that.
Are you running oil cooler lines through the radiator? I see mine has extra holes for that but I'm only running coolant through mine.
My thoughts are that it will cool better when pushing the car hard, but under normal circumstances it won't make that much difference. Are you sure the tuner set the fans to turn on at 160*?
Are you running oil cooler lines through the radiator? I see mine has extra holes for that but I'm only running coolant through mine.
My thoughts are that it will cool better when pushing the car hard, but under normal circumstances it won't make that much difference. Are you sure the tuner set the fans to turn on at 160*?
Burning Brakes
Joined: Apr 2006
Posts: 1,059
Likes: 17
From: Stokesdale NC
If it is true? Nothing settles a lively debate better than data. Here's the stock fan programming and there are no choices below 192.
The DeWitts I put in my C6 is working very well. Knocked oil temps down from 300+ to 270 and keeps coolant temps to 210 on 85F days at VIR.
The DeWitts I put in my C6 is working very well. Knocked oil temps down from 300+ to 270 and keeps coolant temps to 210 on 85F days at VIR.
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Former Vendor
Joined: Jan 2000
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From: Brighton
Instructor
Joined: Mar 2011
Posts: 190
Likes: 0
From: Denver CO
, Does the Dual fan upgrade you guys have for C6 fit direct to the stock radiator? or I have to have the Dewitt radiator to fit in?Thanx,
Former Vendor
Joined: Jan 2000
Posts: 5,593
Likes: 631
From: Brighton
Thread Starter
Le Mans Master
Joined: Feb 2007
Posts: 5,481
Likes: 23
From: Danville Ca.
St. Jude Donor '10
The shop that did has done a lot of rad. plus I have put a couple hundred miles on the car since the install. It should have burped up any air in the system by now.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
No, I definitely meant to say DeWitt, but that doesn't mean my opinion is exclusive to your radiator.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Instructor
Joined: Mar 2011
Posts: 190
Likes: 0
From: Denver CO
but on the hwy, the temps always normal 
Melting Slicks
Joined: Jul 2010
Posts: 2,999
Likes: 242
From: Surprise, Az
I wouldn't make that assumption, I have seen trapped air in fuel lines remain so until physically re-bled for far longer periods than a couple of hundred miles.