Best radiator
Thread Starter
Racer
Joined: Nov 2010
Posts: 287
Likes: 1
From: OK
I've had both a Ron Davis and a DeWitts radiator in my ProCharged C6.
I had nothing but trouble from day one with the Ron Davis. It never stopped leaking from the EOC supply and return line ports. Could never get any assistance from the manufacturer either.
The DeWitts is a complete different story. Great quality. No leaks.
My setup uses their drop in radiator with EOC and stock fans, a Meziere EWP and 160 t'stat.
Summer temps in 100 degree heat are coolant 205 and oil 215......... max.
DeWitts rock the house!
I had nothing but trouble from day one with the Ron Davis. It never stopped leaking from the EOC supply and return line ports. Could never get any assistance from the manufacturer either.
The DeWitts is a complete different story. Great quality. No leaks.
My setup uses their drop in radiator with EOC and stock fans, a Meziere EWP and 160 t'stat.
Summer temps in 100 degree heat are coolant 205 and oil 215......... max.
DeWitts rock the house!
Pro
Joined: May 2013
Posts: 672
Likes: 31
From: Rapid City South Dakota
There you have it
"Evans has a boiling point above 180ºC which ensures it will not boil or turn to vapour inside an engine. By remaining as a liquid under all engine loads effective heat transfer is maintained. Engines filled with Evans usually run 3 - 10ºC hotter than those using water-based coolants, but the overall heat transfer and engine efficiency is improved through the elimination of steam-vapour pockets. The lube-oil temperature also runs 3 – 10ºC hotter with Evans but >500,000 successful conversions confirm this has no detrimental effect."
82C = 180 92c =200f (so could be 20 f more)
"Evans has a boiling point above 180ºC which ensures it will not boil or turn to vapour inside an engine. By remaining as a liquid under all engine loads effective heat transfer is maintained. Engines filled with Evans usually run 3 - 10ºC hotter than those using water-based coolants, but the overall heat transfer and engine efficiency is improved through the elimination of steam-vapour pockets. The lube-oil temperature also runs 3 – 10ºC hotter with Evans but >500,000 successful conversions confirm this has no detrimental effect."
82C = 180 92c =200f (so could be 20 f more)
I'm installing a DeWitts radiator in my 69 bbc 496, aluminum heads, approx 690 hp. It's a stick with A/C, do you think I will over heat?
Former Vendor
Joined: Jan 2000
Posts: 5,593
Likes: 631
From: Brighton
Everything I have read about Evans suggests that it is a good product. I know that it is expensive, will run a little hotter, and you shouldn't mix it with other coolants or water.
When it comes to coolants, my recommendation is to keep it simple. Buy a brand name, pre-mixed, five year coolant. This way you don't have to try to figure out a water/coolant ratio and there is no risk of getting minerals from poor water. If it gets low or you blow a hose, just can top it off right from the bottle and again you don't have to worry about changing the ratio. Even if you are in the middle of nowhere, the local gas station with have some.
When it comes to coolants, my recommendation is to keep it simple. Buy a brand name, pre-mixed, five year coolant. This way you don't have to try to figure out a water/coolant ratio and there is no risk of getting minerals from poor water. If it gets low or you blow a hose, just can top it off right from the bottle and again you don't have to worry about changing the ratio. Even if you are in the middle of nowhere, the local gas station with have some.
Burning Brakes
Joined: Sep 2009
Posts: 995
Likes: 11
From: Howell Michigan
IMO....all the shrouds that come with the centri kits are worthless
I went with a Dewitt's radiator and Spal fan package which helped some...but I think where the real problem lies is in the huge gaps around the shroud. No matter how big the radiator or fan package if all you are doing is recirculating hot air from the engine compartment then you aren't cooling efficiently.
I went with a Dewitt's radiator and Spal fan package which helped some...but I think where the real problem lies is in the huge gaps around the shroud. No matter how big the radiator or fan package if all you are doing is recirculating hot air from the engine compartment then you aren't cooling efficiently.
Pro
Joined: May 2013
Posts: 672
Likes: 31
From: Rapid City South Dakota
IMO....all the shrouds that come with the centri kits are worthless
I went with a Dewitt's radiator and Spal fan package which helped some...but I think where the real problem lies is in the huge gaps around the shroud. No matter how big the radiator or fan package if all you are doing is recirculating hot air from the engine compartment then you aren't cooling efficiently.
I went with a Dewitt's radiator and Spal fan package which helped some...but I think where the real problem lies is in the huge gaps around the shroud. No matter how big the radiator or fan package if all you are doing is recirculating hot air from the engine compartment then you aren't cooling efficiently.
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
I'm doing a vented hood this week. I've heard 12-20F difference with a vented hood. I'll report in.
I got a dewitts. It works good but I wish I did the shorter version for the supercharger intake. I may sell it and swap one day. The one I have is the full EOC/TOC one. I'm running an external oil cooler so that part is wasted too.
I got a dewitts. It works good but I wish I did the shorter version for the supercharger intake. I may sell it and swap one day. The one I have is the full EOC/TOC one. I'm running an external oil cooler so that part is wasted too.
Melting Slicks
Joined: Mar 2012
Posts: 2,206
Likes: 22
From: San Diego CA
zr1 mufflers
Colt, you should read the information on Evans from thier website. It will tell you the exact opposite because of the waterless formula, the Evans will actually raise the temperature.
and of course I think the DeWitts radiator is the better choice. Why?
Because we make them, in house, including our own epoxy free cores.
We are so confident in the product, we warranty them for as long as you own the car.
and of course I think the DeWitts radiator is the better choice. Why?
Because we make them, in house, including our own epoxy free cores.
We are so confident in the product, we warranty them for as long as you own the car.
I recently ordered a ZR1 radiator from your website and returned it because I thought i was going to go with a vented hood to reduce engine temps and have decided to keep the stock hood and upgrade the radiator. Do you offer discounts to forum members? i have a heavily modded 2013 ZR1 with 700 WHP running 16lbs of boost. i have the 160 degree thermostat and my temps were in the 180's 190's, but when i upgraded the heat exchanger my IAT2 temps dropped but my engine temps went up about 15 degrees. i know the thicker katech heat exchanger is blocking some flow, I've looked at LG and Ron Davis. any advice and or discount would be greatly appreciated.
Kris
Last edited by K B Vettin; Nov 25, 2013 at 05:20 PM.
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Melting Slicks
Joined: Mar 2012
Posts: 2,206
Likes: 22
From: San Diego CA
Former Vendor
Joined: Jan 2000
Posts: 5,593
Likes: 631
From: Brighton
It's usually something around 15%. Summit Racing is offering free shipping right now. You could also check with Ecklers or Corvette Central. Both offer specials and discounts
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
I don't think there is a part number, they are part of the oil cooler and have to be removed from there. At least that is how it was when I bought them. I may have a set laying around if I look around since I swapped to custom built AN lines.
Melting Slicks
Joined: Oct 2000
Posts: 2,235
Likes: 65
From: Herndon VA
When searching I found a few posts that said you could get them from GM, but didn't have a part number. I haven't been able to find one though so you could be correct.
I still have my OEM radiator so I'll try to pull those and swap them over to the DeWitts.
I still have my OEM radiator so I'll try to pull those and swap them over to the DeWitts.
Melting Slicks
Joined: Mar 2012
Posts: 2,206
Likes: 22
From: San Diego CA
Model: 1139109Z
Our new radiator for 2009-2012 ZR1 option Corvettes. This radiator is also used on 2012 Z06 with special Z07 option.
Melting Slicks
Joined: Mar 2012
Posts: 2,206
Likes: 22
From: San Diego CA
Kris
Melting Slicks
Joined: Aug 2006
Posts: 2,475
Likes: 97
From: KY/TN
St. Jude Donor '13-'14-'15-'16
Tom--i received the radiator and my car is sitting at the dealership because i believe i was sent the wrong radiator. I hate to contact you in a public format but i need a answer as soon as possible and your shop is closed tomorrow. my question is; is the ZR1 radiator a direct fit or does the surge tank inlet hose need to modified? My dealership is doing the install and i have pictures of the issue which is the air bleed pipe on the radiator i was sent is pointing straight out when it should point up at a 45 degree angle as the stock pipe does. the dealership says this is the fit of the LS3/7 not the LS9. please call me if you can 619.300.9032.
Kris
Kris
Melting Slicks
Joined: Mar 2012
Posts: 2,206
Likes: 22
From: San Diego CA
That helps tremendously. They did send the wrong one. You see how air bleed pipe is pointing to 10 o'clock, on the one the sent me it points straight out and the surge tank inlet hose won't connect. It would have to be cut and have extra hose clamped on to make it fit, which i refuse to do. Thanks again, I hope they have one in stock that they can ship over night. I wonder what they are going to do to help me with the extra labor I'm going to charged because of this mistake....