I am currently interested in purchasing a late 90's SL 600, but I am depresed with the relatively low power output (389 HP) for a late 90's 6.0L V12. I know there was a twin turbo AMG version. How hard would it be to convert a standard SL600 to a twin turbo SL600. Any idea of cost etc. Is this a bolt on? Also I cant find any good tunning kits for these, in that sense the SL500 is a better choice. Any ideas would be greatly appriciated.

John Roncallo

There is plenty of power just being stock. I do know someone on this board has a supercharged SL600. But just stock, you won't notice that there is only 390 horseys. It will get up and go, and it isnt afraid to leave rubber from a stop.

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-Justin

91 560 SEC AMG - other dogs dd
01 Honda S2000 - dogs dd
07 MB ML320 CDI - dd
16 Lexus IS250 - wifes dd

it's automatic.

AMG did not turbocharge this motor (so far as I am aware). Rather they bored it out to 7.3 litres giving 535bhp. I understand Brabus took it to 7.3 lites as well, but they were able to obtain 582bhp. Brabus also offers tuning kit B12 which provides an extra 45bhp out of the box (I assume this is a chip).

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JJ Rodger
2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190

The R129 SL 600 is not the best car to modify due to expense. You are better off finding a later model R230 SL 600 with the twin-turbo system already installed or get an R230 SL55 with a kompressor. You would even be better off with a R129 SL 500 and a supercharger kit.

That is exactly the conclusion I'm comming to. But I just like V-12's. It's just such a nice round number. Also the difference between a 129 SL600 and a 230 SL600 is about double the price.

As someone pointed out previously leaving it stock is probably not bad. The SL500 with a Keeman Supercharger kit looks like the best bang for the buck. But it's still short 4 cylinders.

I may endup doing what I am thinking of doing with my 88 560SL. A home brew NOX kit.

John Roncallo