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So the duo from Dewitts would fit in the space of the GM aux?? If yes, when will you have the kit ready?
Don't know the exact date but I am working on it everyday now. If I had to guess, I'd say the prototype install will take place in the next 3-4 weeks and sale parts offered mid Nov.
Last edited by Tom@Dewitt; 09-30-2018 at 06:22 PM.
Making progress with model. GM style transmission hard lines will be included in the kit to make the conversion TOC a plug and play installation. The EOC will use AN fittings and hoses back to the original oil cooler. Installing new Bendpak lift this week to start install.
Last edited by Tom@Dewitt; 09-30-2018 at 06:29 PM.
Great job DeWitts I guess my Z06 A8 gets a nice Christmas present...lol
Originally Posted by Tom DeWitt
Making progress with model. GM style transmission hard lines will be included in the kit to make the conversion TOC a plug and play installation. The EOC will use AN fittings and hoses back to the original oil cooler. Installing new Bendpak lift this week to start install.
Agree, give us a solution to improve oil cooling, we could maybe use both for oil cooling.
Eliminate EOC and move intercooler circuit cooling to corners ala LG and Gspeed
Then maybe water cooling will be sufficient as it is ? main radiator ? More airflow and no need to cool oil ?
Agree, give us a solution to improve oil cooling, we could maybe use both for oil cooling.
Eliminate EOC and move intercooler circuit cooling to corners ala LG and Gspeed
Then maybe water cooling will be sufficient as it is ? main radiator ? More airflow and no need to cool oil ?
Just use one side as the additional radiator cooler instead of the OEM one already installed in that area, and the other to supplement the pathetic EOC. Done.
Just use one side as the additional radiator cooler instead of the OEM one already installed in that area, and the other to supplement the pathetic EOC. Done.
You could do that, but I'm afraid that small of additional engine cooling isn't going to do much. This kit was really only to address the EOC brick, we are working on the ECT with something else for both Auto and manual. As far as the corner coolers go, they work great so there is no real reason to have a 3rd company offering the same thing. Plus DeWitts would like to make those corners coolers for the others and by not competing they would have a much better chance at that.
Tom, is the trans cooler in your design the same capacity as the stock trans cooler? And does your oil cooler replace the EOC brick?
Looks great btw!
We cut the stock trans cooler in half but increase the thickness from 26mm to 45mm. We also increase the number of tube passages from 11 to 17.. Our heat calculations say it is about a 15-20 % reduction in capacity however we feel the stock TOC was a little oversized to begin with. The EOC side does replace the brick.
Last edited by Tom@Dewitt; 10-01-2018 at 07:04 PM.
Speaking for the A8 crowd, this is exciting news and one that I hope will be validated on track. Tom - I hope you have a stock A8 Z06 waiting in the hottest part of the country to have it track tested at ambient temps of over 85'.
Otherwise, this product will have a tough time selling.
DeWitts is looking for someone going to Spring Mountain. Due to the cold season we are unable to produce the ambient temperatures and track conditions in Michigan necessary to evaluate this package.
You must have a Z06 automatic and the best candidate would have tracked previously and faulted with data. Please do not IM me, I am retired and just helping develop product. If you have plans to go and would like more information please send me an email at tadewitt@dewitts.com
i would love to see your products have the most success as possible Tom.
Since you are doing the chin coolers still in the vertical orientation (and you already know that is not my personal preferred "flavor" for doing it ) but if you do go this route, What do you think would happen if you put a shroud on the top side of each cooler that captures the incoming nose air and forces it down through the coolers? My opinion is that it would help tremendously. The height of this intake would only need to be an inch or 1.5 inches above the body work of the base of the inlet or "mouth" of the car, and it would flow a lot of air at speed. I guess the only downside i see is leaves or something getting trapped in there and needing cleaned more often.
A reversal of this concept would want to be under the coolers, with its opening facing towards the back of the car, so that as the car is it speed, ram air is pushing in the top side, and vacuum is being created on the bottom side. The bottom side can be achieved with correctly placed rubber strips, like the rubber strip already on the bottom of the chin of the vehicle (perhaps it is already in perfect alignment still for your kit, and no alteration is needed)
iWhat do you think would happen if you put a shroud on the top side of each cooler that captures the incoming nose air and forces it down through the coolers? My opinion is that it would help tremendously.
It probably would help direct the heat down but it would just add it to the TOC if you had an automatic or the GMPP add-on for the manual guys. What I am trying to do is get rid of the EOC heat under the car and eliminate it from the coolant system completely. For what it's worth, I am not in love with the current cooler either. It works but some of the heat is recycled back to the stack up and the install requires removing the front facia. The new package eliminates all that. Early flow testing shows the pressure drop of these compact coolers is 1/3 of the stock GM TOC or GMPP.
Below is a photo creation I made to illustrate the differences between the stock TOC and GMPP and the new DeWitts compact unit. During flow testing I discovered the stock unit has a very high pressure drop due to two quick 90 degree turns and a single tube entrance. The DeWitts plate unit has the fluid entering a common tank and distributes the fluid evenly through 17 tubes. Using 6 gpm as a high rev engine flow, the GM part is (6) six times as high! (3 psi vs 18 psi) This test was done with 10W30 oil at 200 F. When I see this result I wonder how this cooler provides any help as a add on radiator.
Next up on the development is to add thermocouples and see what the heat rejection of both these items. Here is my test stand
09-19-2018, 05:20 PM
I guess my Z06 A8 gets a nice Christmas present...lol 
) but if you do go this route, What do you think would happen if you put a shroud on the top side of each cooler that captures the incoming nose air and forces it down through the coolers? My opinion is that it would help tremendously. The height of this intake would only need to be an inch or 1.5 inches above the body work of the base of the inlet or "mouth" of the car, and it would flow a lot of air at speed. I guess the only downside i see is leaves or something getting trapped in there and needing cleaned more often.
