Thought I'd chip in on this one. Against the prevailing opinion I am completely in favour of remapping the D2 S8.
Along with a few others here I had the REVO Stage 2 map put on my old car. It was totally worth it in my opinion as it made the car far more drive-able in normal conditions and gave it a more urgent top end.
The biggest difference was that is moved the torque further down the rev range. Before the map, the car really needed 4000rpm, before you would start to feel the push in the back. After the map, my car would pull from 2500rpm and then above 4000rpm it would start to stomp on again, with the final 6-7000rpm range being awesome. In fact it would rev out so hard and fast in the lower gears, the change up points where about 250rpm higher.
In daily driving the car felt much smoother, even though I had the most aggressive map for the throttle response. It was faster at Santa Pod, I gained 0.2 secs in the qtr mile.
Overall well worth the money I paid for it. The REVO map, felt entirely consistent on all the other cars I drove. In a side by side rolling test, two S8's with the maps couldn't be separated between 50-130mph. An added bonus for me was that when I forced to fit Sports Cats to my car, the map had already coded out the rear lambda sensors. Oh, it also removed the speed limiter, I had a GPS verified 158mph in Germany and it was still pulling when I had to slow for traffic.
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