for what it's worth, many TD's and TDI's and NA diesels adapted to Suzuki Samurais are running flywheels that are substantially cut from stock - my first one was a 1.9td flywheel with about an inch and half of the diameter removed to fit inside the the Suzuki bellhousing, using the Suzuki ring-gear too. It does make for a quick-revving diesel, as in, you can "blip" the "throttle" and get snappy response. I cannot say it would do much for your 0-60 times but the VW TD will run with a LOT less mass (and smaller diameter means I removed the most effective mass, at that).