Heavy or lightweight flywheel?

I could not agree more with 33IMP's words of advice. Like him I loved my aluminum flywheel on the street but ran a narrower tire than I might have otherwise so they would spin a bit and NOT hook. But at the track my 2.5L SL6 just nosed over and stumbled with the slicks on it and that aluminum flywheel. So you can't have optimum performance in both worlds and thus your choice. Similar to the difference between a car that is quick (0-100 in little time) and one that is fast (goes 190 mph but takes a couple miles to get there). I will ad that the difference between 22# and 28# Flywheel may not even be noticeable. the difference between 28# and 13# definitely is !