SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Who's quicker at highway speeds?

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Old 10-03-2005, 02:37 PM
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Who's quicker at highway speeds?

SL600 or SL55, which car is quicker from around 75mph to 150mph? Thanks!
Old 10-03-2005, 08:26 PM
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2008 Bentley GTC, Porsche GT2/EVOMS GT700, 1968 Dodge Charger Hemi
Originally Posted by ///CLKfiftyfive
SL600 or SL55, which car is quicker from around 75mph to 150mph? Thanks!
Defintely the 600. More HP and twin turbos, there's no replacement for displacement!!!!
Old 10-03-2005, 08:42 PM
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Originally Posted by RennTechV12
Defintely the 600. More HP and twin turbos, there's no replacement for displacement!!!!
That is exactly the answer I was looking for...I have almost made up my mind!
Old 10-03-2005, 08:48 PM
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2008 Bentley GTC, Porsche GT2/EVOMS GT700, 1968 Dodge Charger Hemi
Originally Posted by ///CLKfiftyfive
That is exactly the answer I was looking for...I have almost made up my mind!
Once you get your 600, RennTech it!!! You will be untouchable!!!!
Old 10-03-2005, 10:20 PM
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Originally Posted by RennTechV12
Once you get your 600, RennTech it!!! You will be untouchable!!!!
How much $$ do you have in mods to get your car where it is now? How does your exhaust sound compared to stock?

Thanks
Old 10-03-2005, 10:29 PM
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2008 Bentley GTC, Porsche GT2/EVOMS GT700, 1968 Dodge Charger Hemi
Originally Posted by Juice it
How much $$ do you have in mods to get your car where it is now? How does your exhaust sound compared to stock?

Thanks
6.2K-RennTech ECU&tranny module
1.2k-100 octane flash
3.5k-eisenmann exhaust
Old 10-03-2005, 10:34 PM
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Originally Posted by RennTechV12
6.2K-RennTech ECU&tranny module
1.2k-100 octane flash
3.5k-eisenmann exhaust
holy hell... 3.5k for an exhaust kit???
Old 10-03-2005, 10:35 PM
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W213 '17 E43 ///AMG - W211, W208 no more
well, at the least, you get more than what I got with my eisenmann exhaust...
Old 10-03-2005, 11:45 PM
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[QUOTE=there's no replacement for displacement!!!![/QUOTE]

True! But since the SL55 is 5439 cc and the SL600 is 5513 cc, we're only talking a difference of 1.3%.
Old 10-04-2005, 12:04 AM
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Originally Posted by doltmo
True! But since the SL55 is 5439 cc and the SL600 is 5513 cc, we're only talking a difference of 1.3%.
Add into the displacement the boost level of each car and you have a wider gap. V-12=1.0bar while V-8=0.8bar. Turbo also produces more net power in upper RPM ranges while supercharger is declining due to friction, pumping losses and heat which makes it easier to modify when you get tired of 500HP.
Old 10-04-2005, 01:33 PM
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SL600, A8L W12, Continental GT, Range Rover SC
Originally Posted by ///CLKfiftyfive
SL600 or SL55, which car is quicker from around 75mph to 150mph? Thanks!
I've owned an 03 SL55 and an 04 600. The 600 is somewhat quicker stock and massively so with Renntech's software.

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