SLK55 (R171) 2004 - 2010: SLK200K, SLK280, SLK350, SLK55, SLK55 Black Series

New SLK55 Faster than SL600

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Old Nov 24, 2005 | 10:25 PM
  #26  
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Arrival Date

Originally Posted by RennTechV12
What are you gonna take...the bull or the horse?
I'd love to see what the 430 could do. But, it doesn't get here till the 23ed of December if everything goes according to plan and then there is the issue of the dreaded break-in And I still might not keep it depending...

If the dates are right I’ll make a run out and see what the Murci and Spider can do
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Old Nov 24, 2005 | 10:27 PM
  #27  
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Originally Posted by mrkbbd
Ah yeah, that was a RennTech SL600.
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Old Nov 24, 2005 | 10:44 PM
  #28  
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Originally Posted by NOTKTS
I'd love to see what the 430 could do. But, it doesn't get here till the 23ed of December if everything goes according to plan and then there is the issue of the dreaded break-in And I still might not keep it depending...

If the dates are right I’ll make a run out and see what the Murci and Spider can do
Make sure to let us know. I'm guessing high 11's.
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Old Nov 24, 2005 | 10:47 PM
  #29  
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Originally Posted by RennTechV12
Make sure to let us know. I'm guessing high 11's.
I really don't know. I'd be curious to see what I can do with the package. To me it's really an issue of how much clutch I'm willing to waste
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Old Nov 25, 2005 | 01:03 AM
  #30  
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The SLK55 engine IS the SL55 engine isn't it? the only real difference being the SLK doesn't have the supercharger/turbo that the SL does.
...........this a popular misconception. The compression ratio on the SLK is 11:1. This is why only a low boost s/c such as that by Kleemann or HPs is safe. Mercedes dropped the compression ratio in its AMGV8K engines to 9:1. This allows them to use a high boost s/c running at 14psi whereas the Kleemann and HPs set up run at 8psi. You cannot simply use the same s/c on the SL55 and plug it into the SLK 55 because the compression ratio is too high and the engine will blow.

SLK55 COMPRESSION RATIO

SL55 COMPRESSION RATIO

Ted
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Old Nov 25, 2005 | 06:20 AM
  #31  
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Originally Posted by Ted Baldwin
...........this a popular misconception. The compression ratio on the SLK is 11:1. This is why only a low boost s/c such as that by Kleemann or HPs is safe. Mercedes dropped the compression ratio in its AMGV8K engines to 9:1. This allows them to use a high boost s/c running at 14psi whereas the Kleemann and HPs set up run at 8psi. You cannot simply use the same s/c on the SL55 and plug it into the SLK 55 because the compression ratio is too high and the engine will blow.

SLK55 COMPRESSION RATIO

SL55 COMPRESSION RATIO

Ted
Thanks for that. Even though the engine is running a lower compression ratio is it physically the same engine (minus forced induction) as the SL55?
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Old Nov 25, 2005 | 09:24 AM
  #32  
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Originally Posted by SLK55AMG
Thanks for that. Even though the engine is running a lower compression ratio is it physically the same engine (minus forced induction) as the SL55?
Yes, Why would MB spend a million dollars to develop two completely deferent 5439cc V8 SOHC 24V engines?
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Old Nov 25, 2005 | 09:56 AM
  #33  
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..........the engines are physically the same. But the compression ratio as it relates to s/c boost pressure is important because, it partly explains why a W211 E500 with a Kleemann s/c is not as fast as the a W211 E55. Likewise, the SL55 is not simply an SLK with a s/c. The E55 s/c is running at considerably higher boost. Kleemann is now working on lower compression engines for this purpose. As I understand it, the the E63 et al will be at fairly high compression and to get more power from the engine will be difficult except if the compression is lowered or the s/c used will have to have too low a boost as to not make too much additional power.

Ted
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Old Nov 25, 2005 | 10:11 AM
  #34  
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race him for his car lol, but be sure to look under the hood first
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Old Nov 25, 2005 | 12:33 PM
  #35  
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Originally Posted by Ted Baldwin
..........the engines are physically the same. But the compression ratio as it relates to s/c boost pressure is important because, it partly explains why a W211 E500 with a Kleemann s/c is not as fast as the a W211 E55. Likewise, the SL55 is not simply an SLK with a s/c. The E55 s/c is running at considerably higher boost. Kleemann is now working on lower compression engines for this purpose. As I understand it, the the E63 et al will be at fairly high compression and to get more power from the engine will be difficult except if the compression is lowered or the s/c used will have to have too low a boost as to not make too much additional power.

Ted
Ted, Kleemann runs a half bar, 7 lbs. Kleemann's set up is more efficient than AMG's (550 Hp vs 469 for AMG) whilst still keeping the same/stock headers/exhaust. Kleemann's blower develops more power using less boost (although some of that is ineed due to the higher compression ratio of the SLK as you already pointed out. Tha balance is due to lower intake charge temps). See ya.

-Matt
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