C U IN REARVEIW

Have the 05 with z51 option (built in eoc/toc),better to run built in cooler with the dewitt"s radiator....
Or run a separate cooler for each?

realcanuk

Separate coolers works better for me.

C U IN REARVEIW

Recommendations? With fans?

Detoxx03

Separate cooler.

Unreal

For best cooling, seperate is best, but you can easily make it cost 3x as much, as the coolers/lines/adapters are not cheap. The less cooling the radiator has to do, the better.

C U IN REARVEIW

What coolers you using? Setrab?

Unreal

B&M.

Cooler cost with fittings/lines/etc came out to more than the radiator, and that is just one cooler. Was ~$700 just for the oil cooler. I don't run a tranny cooler at all.

C U IN REARVEIW

Wow! Any pics of your setup?

Unreal

Yah, all over this forum. Had a whole thread on putting on the oil cooler. Search

realcanuk

I run B&M coolers with a fan on it. One for oil, one for trans.

Detoxx03

C6Z cooler here with a stock rad

C U IN REARVEIW

Ok,cool.

speedz06

I went from the oem Z06 cooler to the oil/water cooler that comes with the ZR1 etc because the eforce kit comes with it. This is still remote cooler but my point is that oil to air is better.

My oil temps went up 25 degrees on highway and then now they match the coolant temps when running hot in traffic. This effectively removed the additional cooling I was getting by having lower temp oil than coolant.
Separate oil cooler is the way to go especially on the undersized C6 radiator. Even 10% more core volume for engine coolant has to count for something.

If you have no overheating issues the new oem style water to oil cooler is a clean way to go but for max performance the air cooled type is better. IMO

C U IN REARVEIW

Great write up,thanks.

darknit

I bought the dewitts with 3" cutdown and both eoc and toc built in... 2005 z51 also... the oil temps are definitely lower then the stock setup( highest seen now is like 220 vs stock 240 when getting after it), but I will probably eventually build my own separate oil cooler setup, but leave toc hooked up to radiator...

C U IN REARVEIW

If you get a full sized dewitts radiator with eoc/toc, do you lose coolant cooling surface area....vs. a coolant radiator only? Basically....if you did a eoc/toc dewitts setup now.....and then eventually going to dedicated eoc/toc units and capping the coolers in radiator if needed?

realcanuk

I would just do what works best the first time. Its well documented what the guys with no heat problems are doing. Best not to try and reinvent the wheel.

C U IN REARVEIW

I can appreciate/ understand that logic.....but get's exspensive REAL quick.....lol

Unreal

Coolers are in the end tanks, so you lose some coolant capacity, but cores are same, so it is probably negligible.

EuroRod

I have a 6.8 liter, D1 in my C6. My experience has proven that a full size DeWitts and a separate EOC is the best solution. I've tried the DeWitts full size w/EOC and a shorty DeWitts w/EOC. Neither did the job.
Keep in mind that at normal operating temps, the oil circulating through a radiator oil cooler is actually heating the coolant.

So, here I sit with two DeWitt's radiators and they need a home.
The shorty w/EOC is practically brand new with maybe 100 miles. The full size w/EOC has around 5k miles and has some minor fin "scrapes".

Reasonable offers considered.