AMS Heat Exchanger Observations
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Senior Member
Joined: Jun 2009
Posts: 317
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From: Chicago, IL
AMG GT S & E63 S AMG
AMS Heat Exchanger Observations
Have had the enlarged AMS heat exchanger on my car for over half a year now and have observed it to decrease my peak engine oil temperature by about 20-25 degrees during the hot summer days. It has been really cold here in Chicago the past few days, and I want to say that the heat exchanger works a little too well and the car stays cool for much longer.
On my way to pick the catted downpipes from AMS yesterday, it was 10 degrees and the engine oil temperature was at 165 degrees right before I got onto the highway. Once I got up to speed of between 70-75 mph, the oil temp had dropped to 140 degrees and stayed under 145 until I got off the highway 15 minutes later. At the first stop light after the highway, the oil temp had gone back up to 175 degrees, which means that heat exchanger at 70-75 mph had a 30 degree cooling effect on the oil temp. For the return trip, the oil temp was at 195 degrees upon entering the highway and it dropped to 161 degrees soon after getting to 75 mph and it stayed below 165 for the entire 15 minutes on the highway. At the first stop light after that, the temp was back at 195 degrees, which is a 30 degree drop once again.
Since I purchased the car at the end of last January, I had to drive the car for a few weeks last winter and the most I remember the oil temp dropping on a cold day on the highway was about 10 degrees with the stock heat exchanger. I would highly recommend this product to anyone who lives in hotter climate area and enjoy driving aggressively. For us living in the frozen tundra, the draw back is that the car takes much longer to get to operating temperature because the product works really well. Thank you once again AMS!
On my way to pick the catted downpipes from AMS yesterday, it was 10 degrees and the engine oil temperature was at 165 degrees right before I got onto the highway. Once I got up to speed of between 70-75 mph, the oil temp had dropped to 140 degrees and stayed under 145 until I got off the highway 15 minutes later. At the first stop light after the highway, the oil temp had gone back up to 175 degrees, which means that heat exchanger at 70-75 mph had a 30 degree cooling effect on the oil temp. For the return trip, the oil temp was at 195 degrees upon entering the highway and it dropped to 161 degrees soon after getting to 75 mph and it stayed below 165 for the entire 15 minutes on the highway. At the first stop light after that, the temp was back at 195 degrees, which is a 30 degree drop once again.
Since I purchased the car at the end of last January, I had to drive the car for a few weeks last winter and the most I remember the oil temp dropping on a cold day on the highway was about 10 degrees with the stock heat exchanger. I would highly recommend this product to anyone who lives in hotter climate area and enjoy driving aggressively. For us living in the frozen tundra, the draw back is that the car takes much longer to get to operating temperature because the product works really well. Thank you once again AMS!
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E63
While I say that is great, I do not understand what you have exactly? The AMS heat exchanger is designed to keep the IATs in check not the engine oil or engine coolant. If anything it should help get the regular oil and radiator temps up to operating in a much faster time due to it blocking airflow to the stock radiator and oil cooler (not saying there is a problem there, just speculating).
So unless I missed something (like the heat exchanger also incorporates the oil cooler), your observation are unrelated to the AMS product you have
So unless I missed something (like the heat exchanger also incorporates the oil cooler), your observation are unrelated to the AMS product you have
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From: Toronto
CLS63 PP
What they said...The heat exchanger cooling loop for IC circuit is separate from main engine coolant circuit. No way that the kit affects your oil temps in any way. Unless you meant to say Intake Temps post IC core ( typically called IAT 2). How did you log this difference? I assume OBD2 logger of some kind and not eyeballing oil temp reading.
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CLS63 PP
Well I appreciate your anecdotal messaging, I have to say the science just can;t back this one up friend. To be clear nobody should buy this kit to have an oil or engine cooling temp drop. It's just not possible. I have heard good things about this kit on the IAT front, and looks like a solid, and well engineered kit for that purpose. I would consider getting one, but I think I am going to pursue a custom killer chiller setup this time around.
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From: Chicago, IL
AMG GT S & E63 S AMG
Yeah, I am probably wrong on this one and that's why it was just an observation. I thought it was pretty interesting when the oil temp drops were that drastic. However, I am a little confused because there is only one place to add coolant in the engine bay.
Well I appreciate your anecdotal messaging, I have to say the science just can;t back this one up friend. To be clear nobody should buy this kit to have an oil or engine cooling temp drop. It's just not possible. I have heard good things about this kit on the IAT front, and looks like a solid, and well engineered kit for that purpose. I would consider getting one, but I think I am going to pursue a custom killer chiller setup this time around.
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From: Toronto
CLS63 PP
If you lift up the carbon engine cover you will see the filler for the divorced cooling circuit for the IC.
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AMG GT S & E63 S AMG
Got it. Thanks! I would also say that even during the hot summer days when it's over 90 degrees, the car never fells like it is down on power after some aggressive driving.
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E63
I have never driven the car in temps above mid 70s so I am sure there will be a drastic drop in power for mine without the cooling upgrade based on my observations in 60s weather only!
So I got the whole kit, Heat exchanger, auxiliary heat exchanger/reservoir in fender, additional pump and divorce kit
After looking at the Alpha kit I am starting to speculate on something....
The 2012 and possibly some 2013s have the same/similar large primary HE as the 2014+ but no auxiliary exchanger. And of course they also do not have a split/divorced circuit.
So I got the whole kit, Heat exchanger, auxiliary heat exchanger/reservoir in fender, additional pump and divorce kit
After looking at the Alpha kit I am starting to speculate on something....
The 2012 and possibly some 2013s have the same/similar large primary HE as the 2014+ but no auxiliary exchanger. And of course they also do not have a split/divorced circuit.
Last edited by kponti; Jan 20, 2016 at 01:56 PM.
