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03 SL 55, Renntech pkg Plus, ceramic headers, phenolic intake spacers 8mm wires 80mm TB 2nd cat del
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I have been looking at ECU upgrades from Kleemann Renntech and Powerchip. Powerchip claims the highest increase in HP. Is there a noticable difference in performance after the upgrade? Also, is it best to stay with Kleemann or Renntech?

Thanks
 

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Several MB's
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I have been looking at ECU upgrades from Kleemann Renntech and Powerchip. Powerchip claims the highest increase in HP. Is there a noticable difference in performance after the upgrade? Also, is it best to stay with Kleemann or Renntech?

Thanks
I did the Renntech ECU upgrade and at the same time a larger pulley, throttle body and carbon fiber airbox. The performance is very noticable. I am sure a simple ECU will give you more power but I would at least do a larger pulley with it.
 

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Hi guys, i'm new to this website...it's cool, i love it...just have a questions...i'm thinking to get powerchip, all i want to know if it's safe to have it installed, no problems later? i have a 2005 C230 kompressor...
 

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SL500, CL55, E350, E320
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Hi guys, i'm new to this website...it's cool, i love it...just have a questions...i'm thinking to get powerchip, all i want to know if it's safe to have it installed, no problems later? i have a 2005 C230 kompressor...
Powerchip should be safe (there was a guy on W203 forum damaged his ECU with other tuner). I had it on my SL500 around 2 years ago. I don't notice any differences in performance although the mpg has been increased. I get around 1.5mpg more than before.
 

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I have been looking at ECU upgrades from Kleemann Renntech and Powerchip. Powerchip claims the highest increase in HP. Is there a noticable difference in performance after the upgrade? Also, is it best to stay with Kleemann or Renntech?

Thanks
You may want to check my company (VelocePerformance.com Performance ECU Tuning). We have significant gains in the 55K motors. One of our clients, who has just our ECU mod ran against a Renntech car with an ECU/pulley combo and out ran him! He has since gone to our ECU/pulley combo and dyno'd at 585 hp/620 lb ft tq.on 91 octane fuel!
 

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2006 sl 500
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YOU WILL NOTICE A DIFFERNCE ON YOUR SL55 FOR THE SIMPLE FACT THAT IT IS FORCE INDUCTION YOU CAN ALSO TWEEK THE TRANSMISSION I WOULD GO WITH RENNTECH AND THEN KLEEMANN THEY WORK WELL AS UPGRADES FOR AMG MODELS.
 

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YOU WILL NOTICE A DIFFERNCE ON YOUR SL55 FOR THE SIMPLE FACT THAT IT IS FORCE INDUCTION YOU CAN ALSO TWEEK THE TRANSMISSION I WOULD GO WITH RENNTECH AND THEN KLEEMANN THEY WORK WELL AS UPGRADES FOR AMG MODELS.
All these cars (AMG/MB) are very tunable, be they NA or FI, but it does take the right staffing and software writers to make it happen.
 

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A V8 with forced induction -how nice !!

I didnt relaise the SL55's were forced induction - supercharged i assume - hence the pulley change.

In my experiece many years ago with Ford RS Cosworths (a wonderful vehicle but lost on our American cousins), standard 204bhp 2litre 4 cylinder.

In the UK the trade in ECU mods was MASSIVE, every jocky with a laptop was a bespoke software engineer!!!

In my experience there are very few 'real' software engineer's out there who have the knowledge to modify an ECU - the variables to consider in the program are 'significant'.

There are various ways to extract power from an engine, the basic principle is pour gas in one end, force a bit of air in, explode the mixture in a metal box -off we go.

The real experts turn these basic principles into an art, they don't simply pour in more gas and wind up the boost. Remember MB have spend millions on software development, some guy in a shed wont better it. Faster is easy, better is not so easy.

YOU GET WHAT YOU PAY FOR - cheap is cheap.

But the right mods are AMAZING, performance improvement is blistering. But remember that motor is unlikely to do 500,000 miles - who cares !!!

Trust me i have changed melted pistons - that ain't good !
 

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subscribed. I'm interested in learning more here for my '03 sl55 as well...VRP/powerchips and Kleeman I've seen dyno charts from (the Kleeman one was for a K3 package minus the cams from a authorized dist in Philly which is fairly close to me). I've not seen any dyno results from Veloce or RennTech, maybe there are some floating around... any info on dyno or trap speeds would be helpful...
 
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