Good Evening Gents,

In regards to our TCU tune, link is below.

https://www.premiertuninggroup.com/c...cu-calibration

The process is quite long and we will try to make it as concise as possible. Excuse the rather long reply.

We have done extensive R&D on the C190 TCU. As a matter of fact, our ability to tune the TCU is the real reason why we are the exclusive Mercedes clutch dealer for Dodson.

Let's first discuss stock clutch pressure and slip. This is a general rule of thumb for clutch pressure and the clutch's ability to hold is the following.

2015-2019 GT/GT-S will see slip at roughly 720whp
2020+ GT/GT-S will see slip at roughly 800whp
GT-C/GT-R will see slip at roughly 850whp
GT Black will see slip at roughly 875whp
PTG Tuned C190 will see slip at roughly 950whp
PTG Tuned C190 with Dodson Clutch will see slip at roughly 1,400whp

This is pretty critical data that has been extensively tested by us because it gives us a baseline as to what AMG is putting into their calibration files to make the TCU hold more power and ultimately shift better. If you have driven all the variations of the C190, you will see that the Black Series is the best of the bunch, it gets progressively worse as you go up the line. We list the baseline pressures on our website but to reiterate, we run clutch pressure up to 32 Bar while stock GT/GT-S is 22 Bar, Stock GT-C, GT-R 25 Bar and Stock GT Black Series 27.5 Bar.

We also see that shift speeds among many other parts of the calibration are far superior in the Black Series. As a matter of fact, the Black Series has perhaps thousands of maps that differ from the next best thing (GT-C and GT-R) and we have gotten quite a bit of data on what these are, and how to make it even better than the Black Series.

The next thing to note is gear ratio and differential type. The GT/GT-S has different final drive and 1st gear while the others share the same. Some cars have an electronic differential and some have a mechanical differential. This all comes into play when tuning the TCU.

The TCU is also responsible for several torque limits. Just like everything else we outlined, the Black Series has the most "raised" limits. It simply launches much better, and power delivery off and on the shifts is far superior. We have tested this and made our own changes that raise limits responsibly more.

From here, we can easily change things like Race Start. The GT/GT-S requires a complex turn of knobs and pressing of paddles, while the others are just brake and gas. We give you the choice of what you want, and likely that's to just use brake and gas. We also custom calibrate the coolant pumps to run at a higher duty cycle ramp rate. This brings temps down to 160's F rather than 200. When doing this, we see the clutches having much more life, and the car is simply more responsive when it is driven hard.

Lastly, we write custom firmware in the TCU so you can have an adjustable Race Start RPM by using the paddles to adjust up or down. This gives you a launch range based on your desire, but typically set to 3,800-5,000 RPM. We also work extensively on launch control limits so the car leaves the line much better and relies more on the tire's ability to get traction, rather than the TCU limiting power.

You may read all of this and say, I don't make nearly that kind of power. The same rules apply however. Shift speed and timing is a big part of the clutches holding power, and they also transform the feel of the car.

The end result is quite a difference and has propelled client cars to set 60-130mph world records and allows clients to have a truly transformed feel from the transmission.

We hope this helps and please feel free to let us know if you have any questions.

Thanks and Happy New Year.

Team PTG