After reading dozents of threads about IATīs here on CrossfireForum.org and MBWorld.org Forum (E55 section) i came to the following conclusions:
Cooling mods for the SRT6/C32/SLK32 regarding lower IATs.
1. separate cooling system
2. reservoir
3. low pressure high volume pump or pumps (i.e. 2x CWA 50, 1 CWA 100)
4. At least 5 liters coolant fluid in the separated system
5. additional
transmission cooler (under the car cooler) to the existing AMG radiator ie. Mesa style
https://www.wolfgangint.com/store/pr...olers-1117024/
.
You donīt need a Supercooler IMO. The Supercooler is the perfect "heat sucker" especially in lower speed traffic conditions, a big piece of heat sucking aluminium full of water behind the grill in the heart of the heat -> the engine bay. It even blocks the airflow through the condensor and engine radiator and both are heating the supercooler and vice versa. No good. Where does the heat go? Doesnīt make too much sense to me. We have a fully packed small engine bay and the heat doesnīt exit very good.
With an "under the car" style cooler and some additional fluid you will be fine. The water in the reservoir never gets hot, not even really warm! I was wondering myself, but the system doesnīt heat soak ! Perfect for me. BTW i use the smaller 72 plate cooler. Fine for me. But there is a bigger 96 plate cooler.
These small Mesa stlyle
transmission oil coolers are very efficient. Don`t be too much concerned about the size of these babies: they are successfully used on high peformance VW aircooled engines. Talking about 200-250 hp engines - oil/aircooled, no water, just a single
transmission oil cooler and fan on these engines. Again: this small cooler cools a single hot performance VW aircooled engine alone, not just an intercooler!
Very important. You need the water to be flowed. The heat doesn`t have to stay long in the intercooler.
I use 2 x Pierburg CWA50 waterpumps in series. These pumps flow like hell on low pressure and are almost undestructable. I can get them used for 30-40 dollars here in Germany. They are used on different Audi, BMW and VW engines.
Reservoir. I use a VW Golf reservoir. It has an overflow tube on top of the reservoir which helps to purge the airbubbles out of the system very fast and it has a single tube down low which fits perfect to the "T". Itīs almost plug n play. Disconnect and plug to the reservoir
https://www.ebay.com/itm/Radiator-Ov....c100005.m1851
The recovery time after WOT is very fast.-> Video: WOT to about 170mph and IATīs back to 30° over ambient after a couple of seconds. :-)
In slower traffic 10-°15F over ambient.
I have 5 Liters of coolant in the separated system. Distilled Water and 5% Motul MoCool.
Pumps are running everytime (ignition on) but i would recommend a power switch for the second pump. No need of 2 pumps when not speeding.
The system is easy to fit. one pump on each side of the car (see pics).
Costs: aprx. $200 for the whole system including the pumps.
Steven
Berlin Germany.