Dewitt Direct fit input Please
Thread Starter
Instructor
Joined: Jun 2010
Posts: 108
Likes: 0
From: NE Texas
Dewitt Direct fit input Please
LS2, 07 C6, A6, Z51, E Force with pump, cam, springs and keepers, headers, Cosa, Beehive with motorhead47 mods (TY Sir). Temps are running 180's highway but I quickly see 200's sitting but is quick to cool off moving.
What temps are you guys seeing with the Dewitt radiators, I feel that is almost a must here. I don't like these temps staying this high with me want ing this beast to live.
Thanks for your input
-fate-
What temps are you guys seeing with the Dewitt radiators, I feel that is almost a must here. I don't like these temps staying this high with me want ing this beast to live.
Thanks for your input
-fate-
Pro
Joined: Jun 2008
Posts: 672
Likes: 1
Get used to it. Even with a Dewitts when the summer gets here your going to get high temps. Don't get me wrong with a 160 and a Dewitts you will run at 205 or so at cruising speeds. But once you let the hammer down a few times it is going to run up.
Speedy
Joined: Mar 2007
Posts: 6,107
Likes: 931
From: Tn
2024 C8 of the Year Finalist - Modified
i have a 160 stat and dewitts and seeing 190* on the highway with 50* ambient temps. I didnt have the cover over my radiator in place so I'm suspecting temps should go down.
Using sheet metal foam and plastic to seal the front cavity to the radiator helps as well.
Using sheet metal foam and plastic to seal the front cavity to the radiator helps as well.
Thread Starter
Instructor
Joined: Jun 2010
Posts: 108
Likes: 0
From: NE Texas
Yeah I'm already at the 160 Stat and I was just wondering if the Dewitts worth the money. It would have to run cooler with twice the coils and volume !!! I see 180's quickly so it is recovering.
Speedy
Joined: Mar 2007
Posts: 6,107
Likes: 931
From: Tn
2024 C8 of the Year Finalist - Modified
If you want to wait until may I can let you know, I was seeing 220 last year when it was hot out.
Burning Brakes
Joined: Oct 2009
Posts: 1,004
Likes: 68
From: Cincinnati OH
I'm also contemplating cooling solutions since summer is right around the corner but don't want to spend money frivolously.
Thread Starter
Instructor
Joined: Jun 2010
Posts: 108
Likes: 0
From: NE Texas
Yes this is a 6 speed paddle shift and I watch the Trans temps and they are ok. But.... trans temps are one of my concerns with wanting a Dewitt.... this leans toward a combination of issues with cooling. There is a Oil cooler AND Trans cooler and now it has the burden of heat soak from this blower. I'm just thinking I would hate myself for not going ahead and spending this 600-1000 bucks to cool this whole thing down ...it can't hurt 
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Thread Starter
Instructor
Joined: Jun 2010
Posts: 108
Likes: 0
From: NE Texas
Thanks this is the kind of information I was looking for. Has anybody got temps for before and after. I would think oil and trans cooling would have to figure in here too since they are bringing heat. NE Texas here BTW BADZ so it gets hot and humid 
Safety Car
Joined: Sep 2007
Posts: 3,502
Likes: 82
Sitting still is always an issue. Airflow across the heat exchanger, AC condenser and finally the radiator when at rest is totally dependent on the cooling fan behind the radiator. The first thing you want to do is have a fairly aggressive fan speed profile set up by your tuner.
Melting Slicks
Joined: Apr 2007
Posts: 3,290
Likes: 0
From: Willow Springs IL
I have a Dewitt's in my supercharged 07. I see "stock" temps of around 210 during pretty much any driving conditions. I have the stock thermostat and stock fan settings. When I had the stock radiator, the fans ran quite a bit. With the Dewitt's the fans run much less while still maintaining the same temps. It's definitely a worthwhile upgrade in my opinion.
Safety Car
Joined: Sep 2007
Posts: 3,502
Likes: 82
Here is the stock cooling fan table..notice it doesn't even come on until nearly 200 degrees and then only at 15%
My current fan profile...
Safety Car
Joined: Oct 2001
Posts: 4,945
Likes: 0
From: Dallas/Valley Ranch TEXAS!!!
I have a Different S/C setup than yours with a VERY large intercooler instead of your "heat exchanger", but I would highly recommend the dallas performance "twin" spal fan setup. This setup has worked great for me and several others making some decent power down here in the Texas heat...
Burning Brakes
Joined: Aug 2008
Posts: 906
Likes: 2
From: The Woodlands TX
I have a Different S/C setup than yours with a VERY large intercooler instead of your "heat exchanger", but I would highly recommend the dallas performance "twin" spal fan setup. This setup has worked great for me and several others making some decent power down here in the Texas heat...
I did the same upgrade with the stock radiator and it does well in the Tx heat
Pro
Joined: Apr 2008
Posts: 717
Likes: 1
From: DFW 942whp/938tq
I have a Different S/C setup than yours with a VERY large intercooler instead of your "heat exchanger", but I would highly recommend the dallas performance "twin" spal fan setup. This setup has worked great for me and several others making some decent power down here in the Texas heat...
Pro
Joined: Jun 2008
Posts: 672
Likes: 1
I have a Different S/C setup than yours with a VERY large intercooler instead of your "heat exchanger", but I would highly recommend the dallas performance "twin" spal fan setup. This setup has worked great for me and several others making some decent power down here in the Texas heat...
Melting Slicks
Joined: Dec 2002
Posts: 2,897
Likes: 0
From: Lone Star State
I'm also running the stock single fan with the dewitts, this is probley why I didn't see much of a change.
The twin fan setup may be something I may consider as well.
The humid Texas weather here is terrible during the mid summer time.
The twin fan setup may be something I may consider as well.
The humid Texas weather here is terrible during the mid summer time.
