Indeed! Now writing from the Isle of Skye, resting from a two-day drive in the Highlands at speed. Engine (and car) behaved superbly, from very low rpms, without any flat spot (also have the quad Librands exhaust). The rev range of this remapped engine is truly impressive: can be driven on the torque like a diesel, or at higher revs like a race engine.
PS: and judging by the state of my car when I bought it (just serviced at Miller) I would have kept Miller without hesitation., but they are a few hundred miles away! The only S1 I saw and tested from RTCC was not in good condition--amongst a long list of problems to be fixed before eventual purchase, the engine was cutting out at most intersections unless blipped.
There should be no flat-spots until the rev-limiter.. the BMW V8 runs out of puff at that point.
I had a re-mapped S1 and didn't suffer any of the issues you mention. And had an independent Dyno Map for 320-330. Phil RS has the car now. He could tell you what it's like to drive!!
