Ginger55k
Active Member
The 55k is a great engine and drive chain, "bullet proof" is what you will hear most often say, but the cooling???
Ok the AMG design team built a luxury car to transport executives down the German Autobahns and not a car to be thrashed up and down the quarter mile or on the track.
Savmans previous thread covers the basics.
http://www.mbclub.co.uk/forums/amg-performance-lounge/159006-tuning-55k-part-3-ic-cooling.html
So the beginning of this story is a chat with Olly and the boys at PCS, what was needed was a supplied donor car that the boys could have for a length of time to design fit and build a more suitable cooling system.
Ok fact number one, if your going to mod these cars either very early on or soon after the massive heat soak these engines produce will catch you out and the engines ECU will retard timing eventually disconnecting the supercharger clutch to put a stop to your fun and games.
As has been stated before on the AMG threads regarding the Eurocharged events, a high number of cars turning up with a poor performing or dead IC pump which the owners were not aware of for other upgrades or dyno runs/tunes.
Unfortunately I fell into the category of owners with a failing IC pump having experienced the clutch disengage before, which happens at the extreme end of the IAT range.
More importantly is what is happening to your car at those mid level temperatures i.e. pulling the timing or in laymans terms "robbing your horses" which without using some sort of data logger most owners would be oblivious to the loss of power.
I am using an Android tablet with Torque pro app and a bluetooth obd2 module to capture the live data.
So hear is the stock graph, ambient air temperatures at 18c during test, and an eye watering 103c peak, repeated WOT and break runs carried out to stress the cars cooling system.
Ok the AMG design team built a luxury car to transport executives down the German Autobahns and not a car to be thrashed up and down the quarter mile or on the track.
Savmans previous thread covers the basics.
http://www.mbclub.co.uk/forums/amg-performance-lounge/159006-tuning-55k-part-3-ic-cooling.html
So the beginning of this story is a chat with Olly and the boys at PCS, what was needed was a supplied donor car that the boys could have for a length of time to design fit and build a more suitable cooling system.
Ok fact number one, if your going to mod these cars either very early on or soon after the massive heat soak these engines produce will catch you out and the engines ECU will retard timing eventually disconnecting the supercharger clutch to put a stop to your fun and games.
As has been stated before on the AMG threads regarding the Eurocharged events, a high number of cars turning up with a poor performing or dead IC pump which the owners were not aware of for other upgrades or dyno runs/tunes.
Unfortunately I fell into the category of owners with a failing IC pump having experienced the clutch disengage before, which happens at the extreme end of the IAT range.
More importantly is what is happening to your car at those mid level temperatures i.e. pulling the timing or in laymans terms "robbing your horses" which without using some sort of data logger most owners would be oblivious to the loss of power.
I am using an Android tablet with Torque pro app and a bluetooth obd2 module to capture the live data.
So hear is the stock graph, ambient air temperatures at 18c during test, and an eye watering 103c peak, repeated WOT and break runs carried out to stress the cars cooling system.
???
