If this topic has been covered before I apologize. I read the first seven pages of this forum and didn;t find anything, and the so called "search" feature on this site leaves a lot to be desired.

The MB claims the C63 has 451 HP, while, with seemingly the same motor, the rest of the AMG 63 line (pre 2012 bi turbo V8) supposedly puts out 518 HP. I would imagine this would be due to some computer controlled limitation such as the throttles not opening all the way. Will a ECU reflash bring the C63 up to or past the HP output of the rest of the 63 line?

If that is the case, will a greater benefit be realized with the Development package? Is it worth the extra $$$??

Thanks,
Future C63 owner

 

i would image it's either detune or a different turbo.

 

Yes, years ago when they first started tuning the 6.3 platform ; tuners realized that the throttle bodies in the c63 were only opening 75% rather than most of the other 63 motors ( S, SL, CL) were all making there 518HP... Now you can get a flash and have full potential of the 6.2

 

So then, a C63 with just an ECU reflash will churn out 518 HP???
And what do these flashes cost? Who does it the best?

 

It will make more than 518HP, Brabus quotes 530PS for their B63S Tune.

B63 S C 63 390 kW / 530 PS
650 Nm + 54 kW / 73 PS
+ 50 Nm 4,1 s
> 300 km/h

Carlsson:

Leistungskit CK63 EU5

 

i thought the models had different heads that yielded the difference in power? If its just a tune that limits the power the C63 engine is not even really being pushed hard, I guess they will last a lot longer that way.

 

I doubt it. It's a 6.2l that develops ~500HP. If it were a 5l I might agree with you (or even less than 5l), but I think this engine is pretty solid. And also the gains in power are not that much. The increase in torque is not over the top to explain your theory.

 

Hit the nail on the head. RENNtech offers a tune that is a night and day difference. Quite a few other things are altered, but their tune takes the C63 up to 517 HP & 485 LB-FT (Crank HP).

They are located in Florida as well. You should give them a ring!

 

Yes fine tuning of the ECU will open the C63 to full potential...

+1 for Renntech being a reputable tuner and simple flash. Give them a buzz; I have worked with them over the years plenty of times regarding P-car stuff as well. Ask for Tomas!

 

This is nothing more than a simple marketing tactic by MB/AMG. They have been doing this for years. It's one of the ways they justified a nearly $30k premium between a C63 and E63. Back in 2008 when all the 63's had the NA 6.2 motor the HP figures ranged from 450 up to 525, the engines were all identical, it was a simple mapping in the tune that would only open the throttle so much. the C63's made 450 and an SL63 was making 525 while my CLK BS made 500. A simple tune can put them all on equal grounds.

 

The C 63's have smaller diameter exhaust system than the other AMG (E, CL, etc.) which in itself restricts the breathing capability. This is the reason the C is rated at less power. The ECU is tuned for this different exhaust system as well with emissions in mind.

Yes you can program the ECU and pick up some gains to equal the rating's of the other AMG 63 models but unless you take advantage of upgrading the exhaust with the tune you're leaving a lot on the table. Nobody has cracked the codes on ECU to develop full throttle potential which remains at about 92%. Real world improvements with the ECU expect to pick up about .8-.9 seconds on a 60-120 mph run.

 

With a Tune, exhaust, and headers, you will be at 500HP+ in no time. A tuned/modded C63 will take a E63 all day long. Now as for the CLS63TT, that thing is a monster, even in its stock form, without the Performance Pack. When tunes start coming out, expect 650 - 700 on that beast.

 

i just found this interesting thread and would like to know if someone can confirm, that the TB only opens 75% in stock config of any c63?

what about the performance package cars? is it opening a little more on this cars to unleash the +30hp? and even more on the edition 507 and black series cars?

any disadvantages known from the "TB 100% open" ecu flashes?

 

That's an interesting question about the Edition 507 and Black Series and I've never looked into the differences in throttle opening between those cars and the standard C63. It is true that the main difference between the C63 and other cars with the M156 motor is the fact that the ECU only allows around 2/3 throttle opening.

There aren't really any disadvantages to allowing the throttle to open fully like it does in the E, S, SL, etc. 63 AMG cars. The motor was always designed to make that power and there aren't any significant hardware differences in the M156 motors that went into the C class. There isn't even a huge reduction in traction because most of the power you gain is at higher RPMs. If you look at dyno sheets of the E63 or S63 (before they switched to the M157 twin turbo V8), you'll notice they have very linear power delivery with power increasing steadily until redline. The C63's horsepower curve falls flat and plateaus around 5,000-5,500 RPM because the partially-closed throttle is preventing enough air to get in and the motor can't make any more power at higher engine speeds.

We just had Jailbreak Tuning tune a C63 last month to free up that top end power and the difference was night and day, I'll try to post dyno sheets soon.

 

I believe the SLS has some hardware differences, but the others are all identical except software?