My Demon weighs 3140 on a track scale. 833 4 speed. When I tried a Centerforce aluminum flywheel, it was only 560ish HP, with 4:10 rear. It was herky jerky at low speed.......I'm talking like 40 MPH just cruising in 4th. Annoying as all hell. Always had to run a gear lower to get the revs up to stop the jerkiness. It's driven a lot of street miles, so NO GO alum flywheel for that.
at that time, I was hitting the track very occasionally and it was a ***** to launch. 2 step at 4000, it bogged. raise it to 4500 and it blew the tires off. I never got a real good chance to track tune it, cause eventually I got the old "you're done sonny". No roll bar.
Went back to a lightweight steel, can't recall which one, but 2 step at 4000 gave me a decent 60 foot. no bog, just enough spin.
Now at 600 ish, same steel wheel, 4500 launch on pavement ( not track) after a nice burnout and you're gone. I think the aluminum would bog.
This is my own real world experience with my car with me driving. Could be someone else has great results with them. Mine is in my shed if anyone's interested.