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

SL/R230: Delimiting

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Old Mar 29, 2017 | 08:14 AM
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romydogra's Avatar
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Talking Delimiting

Just a question,

The 03-04 SL55's have about 493 hp and 513 lb-ft of torque. I've looked around and read that people have "delimited" their engine and are able to achieve 550 horses as well as torque.

Can someone explain how this works, possibly with a ECU tune or something?

Unless I'm not understanding something.

Thanks.
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Old Mar 29, 2017 | 09:39 AM
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You will need headers.and a tune or larger pulley and tune to achieve those numbers. On the other hand, an ECU tune on a 2003.and later 600 can net you 625 hp.
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Old Mar 29, 2017 | 11:08 AM
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I've done both a tune and a SC pulley. The pulley gives immediate results, and probably the best bang for the buck (~$400).
ECU Tune actually hurt the drive-ability a touch, and HP gains were subjective.

Your limiting factor actually becomes rear wheel traction, and once you spin the tires it's a waste of effort.
The other limit is speed (155) on the computer, and you need the developer kit and SDS to remove that. Couple of button clicks and it's done.
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