OK, I finally have a few interesting (although very tentative and by no means "official" or technically exact) numbers for the 4.6is with Dinan S3 package.
City MPG: 9.6
0-60mph: 5.3-5.6 sec. in "Sport" (automatic) mode
The low gas mileage around town doesn't really surprise me, and I do NOT blame the S3 package...mechanically at least. I DO blame it inasmuch as it is virtually impossible for me to leave the transmission in "D"
-- I drive almost entirely in manual now, and I tend to downshift to keep the RPMs in the 2500-3500 range because I just love the throaty sound and quick response at those levels (whereas "D" mode tends to upshift quickly to keep RPMs in the 1,000-2,000 range - little more than idling). I'll get a better idea of the actual impact of the S3 kit on gas mileage "all things being equal" when I do a highway trip where it's in 5th gear most of the time.
As for the 0-60 times, take those with a grain of salt. I do NOT have access to a track or any fancy timing equipment. The 0-60 times are literally taken with me holding a stopwatch in my left hand and attempting to start the stopwatch when I hit the pedal and started to move, and stopping it when the speedometer crossed 60. IOW, I would NOT rely on them as exact times, but I do consider them reasonably close, based on about 8 different runs. I don't have 0-100 numbers because I haven't found a patch of road where I'm comfortable going from dead stop to 100mph (I live in the city)...yet.
My guess is that with optimal shifting (manually), the 0-60 time really
would be at or below 5.3 seconds (which was the fastest stopwatch time I got). That would put it on par with the Cayenne Turbo S (which I believe is 5.2 seconds), and substantially faster than a stock 4.6is (6.2 sec's) or 4.8is (5.9-6.0 sec's, depending on where you read it).
I'd really love to get on a track where I could get some official times, including 0-100, quarter mile speed, etc...and just generally cut loose! If/when I get a chance to do that, I'll let y'all know. I'll also try to get some video one of these days. Meanwhile, I'll just have to enjoy "puttering" around town, rumbling with a smile on my face...and using way too much gas!
