maranello551

On the fabspeed website it says kleemann offers an ecu upgrade for the cl/s/sl 65's that adds up to 739hp and 1300nm of torque, but on the kleemann website they say there is the k1 upgrade for the 65 that adds to 692hp and 1150nm,a k2 for the sl65 black only that gives 720hp and 1150nm. And another k1 for the v12's that adds to 700hp and 1100nm.

What the heck in going on!

Both k1's say that they add 127hp. If the 65's have 612 hp stock, wouldn't they both add to 739?

What is the 739hp 1300nm kit offered by kleemann through fabspeed?!?!

Also, is the kleemann lsd worth buying with this ecu upgrade? How does it affect sporty handling chjaracteristics?

E55AMGFan

Most likely a mistype by Fabspeed, Kleemann's stats are more dead on. I don't know if the ECU Tune sale is going on but contact Brandon @ Kleemann or GMP Performance they are both on this board. The LSD should help you get out the hole quicker but most owners get some drag radials and launch their cars well. From what I've read, researched and came across, ECU'ed 65 AMG (excluding BS) cars dyno anywhere from 570-610rwhp and 680-700+rwtq for strong healthy cars.

GMP Performance got the tune for $2500, if they sell it for $2500, so does Kleemann as Kleemann sets a price and their authorized resellers must follow it, I would go through Kleemann directly since price is the same. Contact Brandon@Kleemann or Cory@Kleemann.

maranello551

Wait...why would ecu'd 65 be less powerful than the stock 612hp?
I was wondering about the lsd but not for drag racing but rather to have a brutal (739hp) car for highway overtaking

jeffw666

Here is real example of their work. The important part to notice is the delta difference between before and after over the rpm range.

E55AMGFan

Those figures are numbers to the real wheel(there is drivetrain loss in where you never get all the hp of the engine to the wheels/ground) if you convert them to crank hp you're looking at engine hp and torque far above factory numbers of 604hp and 738ft-lbs. 570rwhp is 695hp at the engine, 610rwhp is 743hp at the engine, as for torque 680rwtq is 830ft-lbs or 1,125nm. A few 65 cars I've seen done way better then that and got 720rwtq which is 880ft-lbs or close to 1,200nm.

E55AMGFan

Great chart, I'm guessing those are RWHP figures, if so that's one healthy running tuned and even stock numbers SL65.

TMC M5

I believe that the 739hp figure was when Kleemann initially was going to offer a more extensive upgrade kit beyond just an ECU tune. The 692hp and 700hp figure essentially the same #, the 700hp figure is the metric hp figure while the 692hp figure is the SAE conversion. This is the same rational for the 612hp (PS) vs 604hp SAE. I know one particular Kleemann tuned CL65 that has made as much as 578rwhp on cool day running on a Dynojet.

I personally wouldn't invest the $'s in an LSD. Are you going to be taking a 4,600+lbs luxury coupe on a road course? The LSD is beneficial in that type of sporty driving and may help launch the car better on the street. But on a drag strip with drag radials on a CL65 with an LSD vs on with an open differential will have very very little difference.

Tom

E55AMGFan

Thanks for chiming in Tom, I tried to explain to him that there are variances with each car. Was there no torque reading for that 578rwhp CL65?

jeffw666

He told me he gained 110 on torque... he was just wanting to show me about hp. Easy to make the dyno chart shot most anything that you want to see. I come from a motorcycle tuning background on a dynojet dyno.

TMC M5

The tach signal is very difficult to pick up on the V12TT's. On a Dynojet you need the rpm's to calculate torque. That particular run did not get a torque reading, it plotted the hp over speed. However, you can interpolate the torque by figuring out what rpm corresponds to the speed. There was an increase of 150+lbs-ft of torque using the hp figures at the same speed (on the same dyno).

Tom

E55AMGFan

I've heard of that before, it's a PITA to get a torque reading on the V12TT. It's a strong car none the less.