How is the DQ200 gearbox relevant in my question??..................
I was talking about the MQ200 & MQ250 gearboxes which are fitted to the 1.2lt & 1.4lt TSI engines in the Golf MK7 to which your new tunes are for, in this thread & the other thread.............
We've tested and tuned on vehicles with the manual transmissions as well, and have not found any issues, even at higher torque levels than we offer. That will, of course, depend on your driving style. If you abuse the transmission, it may fail. The same is true if the vehicle was unmodified. If torque were to be an issue, we can lower it, but we haven’t seen a need to do so.
The other tuners from what I understand were only offering piggyback as the security on the OBD port was too good (as you know), but these tunes have been around for a year in Europe, & they will do proper flash of ECU soon.....
Also when I was speaking to them they did state the only reason for the torque limit was the gearbox & NOT the piggyback as I did ask if a full flash would make any difference to output levels.......
So again I ask the question ...other tuners limit the torque to protect the MQ200 & MQ250 gearboxes & still offer a 2yr or 100,000km warranty of the drivetrain/engine (in stated countries & car age etc)................
You tune to beyond the VW designated limits & DO NOT offer any warranty in case the gearbox goes bang..............
Piggybacks have their limitations, and typically torque is one of them. They mainly operate by tricking map sensors into thinking boost values are lower than they truly are so the ECU slowly ramps in the wategate to meet the targeted boost level. Because of this, midrange torque will be lower, and overall, you’ll have a lazy boost curve in all driving scenarios.
Also, with some, the boost curve just shifts up a few PSI evenly across the entire RPM range. At high RPM, the turbo cannot make as much boost as it can in the low RPM. If they shift the level up too high to get more low end torque, it will result in an under boost code in the upper RPM range.
With ECU tuning, you can properly remap the ECU to ask for more boost pressure, among many other things, at every RPM break point. It’s the proper way to recalibrate the ECU, and even by your own statement, it looks like you believe the other tuners will eventually get around to doing this, once they’ve figured out how to tune the ECU. It's also safe compared to the alternative. The ECU still knows exactly what all the sensors are reading in reality. It can properly adjust for weather, knock, and more. All of the models work correctly, and everything is happy.
What happens in worst case scenario then?......customer with blown gearbox & dealer telling custom to get stuffed as the gearbox has had more torque put through it (which would be detectable if tune removed before car taken to dealers)...........
Would you pay up for a new gearbox??..............
Gearboxes aren't exploding. For one to explode, it would take far more torque than we're making with a 1.2 or 1.4 cylinder engine unless there is a mechanical issue from the factory or extreme abuse from the driver. The thing that may eventually fail is the clutch. The clutch can fail on a stock car. It's also NOT warranted by VW, and it's NOT warranted by MTM. A clutch is a wear item, and you can clearly read in MTM's warranty terms that it's not covered. Here are several statements from their warranty:
The warranty shall not cover the reimbursement of costs for [...] wearing parts [...].
^^^ A clutch is a wear part
Section 2: Warranty extent, term and scope 1. The warranty shall cover (the list is definitive) the following assemblies and parts: […] d) Mechanical transmission: sprockets, gear-selector forks, sliding sleeves, drive shaft, main shaft;
^^^ Clutch not listed.
Section 3: Warranty exclusions […] j) for which the warranty recipient or driver is at fault,
^^^ Does not cover things that are the drivers fault, like a clutch. Feel free to check your owners manual from VW. It also lists the clutch as a wear and tear item, which is not covered.