Well, sometimes the best way to answer your questions is through empiricism. The controller unit in question has the latest firmware (end Dec 2016) and the most updated maps from Eric Hyman's testing (April 2017), and it was installed on a late 2016 built RHD GT-R, otherwise completely stock. The usual disclaimer applies that these are by definition subjective impressions, and the placebo effect is therefore important to bear in mind. I also don't know how this map compares to the previous base maps.
Installation is straightforward. A communications error was encountered on initial attempt to interface the controller with a laptop. The DSC "Tuning Academy" videos directly addressed this and the issue was rapidly resolved. The 3 videos thus far are referenced here :- https://www.6speedon...ng-academy.html
It was evident from first start that it was "working", as the in-dash controller recalled the last mode used (Comfort) and defaulted to it. The car was taken out for some low speed driving around some pretty ordinary roads, in traffic, to see how this mode actually worked relative to the stock 2016 suspension ECU. Surprisingly, it actually feels *firmer* than the stock 2016 calibration in comfort and normal mode. Not unpleasantly so, but the car is markedly less floaty at low speed. Some may find this less comfortable than the stock suspension programming.
Best way to sum it up is it feels more "R" than "GT" at sub-50mph, which was not at all what was expected. I think this must relate to the setting in the "Shock Calibration" software table, because the "Speed" table in the software modulates behaviour only above 60mph - well above the speeds I was doing on the street. Overall, I believe this is a net positive, but will withhold opinion until I get a chance to test some more.
One other thing noticeable was that it took a little longer for the suspension control switch in-cabin to change from Comfort to Normal to R compared to the stock suspension ECU. Not a big deal, but noticeable.
The car was then taken out on the highway for some acceleration and braking runs and some fun twisty bits against which the stock car is well calibrated. Happily, some fun roll on runs at random speeds were included with a middle-displacement bike that wanted to play. Let me preface this by saying that driving was to the conditions (i.e. nothing egregious), and that the GT-R unfortunately lost . It was *awesomely* fun, though, and thumbs were raised all around
This is where the controller seemed to come into its own. High speed braking is palpably improved - none of the diving due to forward weight transfer that is there with the stock suspension. I ascribe this to better pre-emptive front damper stiffening under braking compared to the stock suspension tune. Some fast, sweeping right hand corners demonstrated palpably sharper turn in, less understeer and a perceptible feeling of "lightness" to the car. Lane changes at 60+mph speeds felt more direct. Overall, a definite net positive thus far.
No launch testing has been undertaken as yet. It will be assessed.
No error codes emerged at any stage.
Overall, in initial testing on a stock late model car, on which there is next to 0 reported data thus far, the verdict is a cautiously positive one, but needing more data. Updates will be forthcoming.
Edited by shombre, 21 May 2017 - 03:48 AM.