SL55 AMG, SL63 AMG, SL65 AMG (R230) 2002 - 2011 (2003 US for SL55 and 2004 for the SL65)

SL55/63/65/R230 AMG: heat exchanger on the 65 cars

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Old Aug 19, 2011 | 10:24 AM
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heat exchanger on the 65 cars

so... without going down there with a measuring tape- what is the largest heat exchanger that can be hacked in there?

i got myself a cm90 (i know some think it is too big and flows too much to cool effectively, but that is just irrelevant as in terms of flow the more the better) and i would like to pair it with a large h/e...

one more thought- are the h/e for the 55 and the 65 cars identical?

so... what is the verdict?

thank you

Last edited by alx; Aug 19, 2011 at 10:43 AM.
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Old Aug 19, 2011 | 03:09 PM
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996tt
Might not be entirely true what you think about the CM90, plenty of evidence to suggest otherwise I suggest you have a look at this. https://mbworld.org/forums/w211-amg/...emma-ev12.html
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Old Aug 19, 2011 | 03:53 PM
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Originally Posted by iAMGod
Might not be entirely true what you think about the CM90, plenty of evidence to suggest otherwise I suggest you have a look at this. https://mbworld.org/forums/w211-amg/...emma-ev12.html
i read it.

but i have plenty experience with electric water pumps and every single time the more gpm there were- the lower the temps were. i have experimented in the past with attaching a rheostat to the electric pump and varying the rpms and observing the temps... the lowest temp was always achieved by the running the pump at the max voltage (ie rheostat shorted).

if you have a very powerful pump i assume you might reach a point at which pumping more has no effect, but i have never seen such scenario. if i could i would run a mini-nuclear reactor there and spin the water at the speed of light

so.. maybe there is some discussion, but not in my book...

one more hint- the overpriced renntech pump pumps close to triple the volume of the stock pump.. you think they dont know what they are doing ?

Last edited by alx; Aug 19, 2011 at 03:56 PM.
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Old Aug 19, 2011 | 06:04 PM
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996tt
From the evidenced produced and others comments and even thinking logically I think the result would suggest otherwise. I'm all for lower temps and if you could or it was shown the CM90 is more effective I would throw out my CM30 today.

To answer your question my HE measurements on my 55 are 28 x 7.5 x 3 - I am told it is quite a large one. I run it in series with my stock one.
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Old Aug 29, 2011 | 10:34 AM
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Originally Posted by iAMGod
From the evidenced produced and others comments and even thinking logically I think the result would suggest otherwise. I'm all for lower temps and if you could or it was shown the CM90 is more effective I would throw out my CM30 today.

To answer your question my HE measurements on my 55 are 28 x 7.5 x 3 - I am told it is quite a large one. I run it in series with my stock one.
thank you. i had the car up and did some measurements. i think 30 x 7.5 x 3 (outside dimensions) is the largest that will go in there without any major hacking.

regarding the pump- i will put a cm90 and experiment with volume (by running a pot inline and observing iat. as i said- i have done a similar setup on a different car and the lowest iats were when the pump was at full tilt (about 200% more volume than stock). if the sl65 is any different- i will know after a play with the setup a bit.
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Old Aug 30, 2011 | 05:21 PM
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here is a short read:

http://www.zzperformance.com/grand_p...les1.php?id=47

The flow of a pump is very important. Assuming you can cool the liquid down with a good front radiator; the higher the flow, the better your system will perform. We tested this using city water on our supercharger dyno. Flow ratings all the way to our max of 12 GPM produced higher temp drops after the core. The conclusion is this: In an ideal intercooler system, you want the most cooling you can fit up front paired with the highest flowing pump you can find.
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