Hi everyone!

I had a Eurocharged ECU tune done on my NA in 2011. It made the car feel more responsive (on top of a sprint booster) and squeezed out a little more hp/torque but it was definitely noticeable and fun.

Years later, after selling my NA, I purchased a SRT6 with a pulley and Eurocharged tune on the car from the previous owner. Since The 65mm Supercharger pulley was the black aluminum pulley and the bearing was definitely on its way out. Since I only heard bad things about aluminum pulleys and don’t trust that they can withstand the pressure the SC puts on them, I upgraded to a 65mm Steel pulley (the ONLY way to go unless you want to have a pulley grenade in your engine bay).
From attending many Cars & Coffee as hearing great things about the company on MBWORLD I wrote to V-Tech in Georgie (the country). The owner has a great reputation on multiple forums and have been around for many many years.
So I had him send me an OBDII cable and tailor a tune for the smaller pulley. I asked him to send me a 91 Octane tune as well as a 93 octane tune as I had always been curios if there really is a felt difference.

Let me tell you, the V-Tech Tune was AMAZING. Huge difference from Eurocharged. The car felt so powerful, torquy and the pedal way more responsive (I actually turned off my sprint booster for now till I get used to it).
I would even say, with the V-Tech Tune you won’t need a Sprint Booster. This is by no means a knock on Eurocharged as I know how amazing, reputable and safe their tunes are but man…I’d be lying if I didn’t feel a huge difference with the V-Tech Tune. I then installed a Needswings Dual Cold Air Intake and had him send me another tune.
His tuning upgrades are free and the price is about half of what NW charger. After doing weeks of data logging, I haven’t found anything in-safe or “on the edge” of acceptability when it comes to long term reliability. The tune is AMAZING!
What other tuners do you guys use and what has been your experience in respect to ECU tunes?

Now on to TCU tuning….I have always wanted the Crossfire Automatic to shift just a little bit more aggressively. So I did my research….V-tech offers a TCU tune I would love to try sometime as I hear great things about it.
There is also a guy, Troy, who has a website named MK-Ultra. He sells a wide variety of TCU tunes with all sorts of cool functions. He doesn’t have the Crossfire/SLK listed under his list of cars but he tunes any 722.6 Transmission and so he could draft up a tune for our cars easily. Unfortunately he is pretty short communicating per email, won’t answer a lot of questions and stopped responding after a couple of email exchanges.

There is a video on his TCU tune on YouTube called MKUltra SLR Tune. He offers tunes baes on the SLR software and all sorts of Manual/Manual+ tunes. Again, sounds like the tunes would be great but if you can’t get him to sell you one, it’s pretty pointless. Unfortunately it seems like he loves to also badmouth other tuners and he literally told me he isn’t interested in entering the Crossfire Community as there aren’t enough Crossfire for him to make it worthwhile. Not the best sentence to potential customers and I doubt he sells TCUs every day like hot bagels so I’d imagine he would be glad if more people would give his product a chance.

That brings me to Andrew Tieken…he is a forum member and sells his 4-Mode tune through the Mercedes Swap Shop. The tune comes with 4 modes - Comfort, Sport, Agility (racing mode) and Manual. You switch cycle through the different modes by pressing the W/S button back and forth. The Manual mode is a true manual, that will not up or downshift automatically and only once you either use the shifter (or if you have your paddle shifters).
Man do I love Agility mode and all the other modes. If you want to cruise and it’s wet, the Comfort mode is amazing, you won’t feel the shift points at all. But the real fun begins in Agility as it has very fast shift points, hold the gears longer and is quicker to downshift at slight depressing of the pedal completely changing the properties of the car. It’s an amazing tune and worth every $ of it.
What other TCU tunes have you used or what are your experiences with TCU tunes?

Lastly, there is a very interesting project going on by a guy named Rand_Ash. He has a few videos out on YouTube but his website is https://ultimate.nag52.net.
He basically built a 722.6 from scratch but much better with better processors and way higher capabilities. He is in the testing phase and is looking for testers but from what I have hear and seen, his work is amazing. The TCU he built, if fine tuned will be like nothing else out there and can be used in many different models and easily tuned towards what it is your are looking for. So it’s been a cool project to follow. He also is a great guy and very honest, which isn’t always the case in the tuning scene,
Can’t wait to see how his TCU turns out once it’s all the way tested and finished and I would love to test one myself. I know he has a couple of folks with Crossfire among his tester group.

Either way, I’d love to hear your experience with ECU/TCU tuning and what other tuners are out there you might have used.