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Agreed it certainly helps exploit the extra performance from the mapping......The other thing I was told by MRC was that as part of the gearbox map the clamping force on the DSG clutches is increased to handle the extra torque produced from the stage 2 map thus preventing clutch slip and premature clutch wear?
Good point - indeed without a gearbox remap there must be a danger of clutch slip. IIRC Doug at MRC was telling me that they regularly see tuned Golfs with clutch slip because the OEM map doesn't apply enough force.
Also as per @arad85 's experience with his APR TCU remap, the MRC one changes gear quicker and I immediately noticed it. However one thing the APR remap is better at than the MRC one is in the changes to the shift points. I wish MRC had done the same. I'd like to be able to drive at less than full throttle but not have the gearbox keep changing up at low revs.