aluminum vs steel flywheel for stroker

GT340 said
I'm thinking that driving on the street with an aluminum flywheel would be a pain in the arse due to any time you let off the gas, the engine would really slow you down, where a heavy flywheel would keep the RPM up. It could be a learned technique but in my opinion an aluminum flywheel would be troublesome.

I would agree with you on that assessment, you would have to work it pretty hard. Have you ever seen someone try to drive a Formula car for the first time. It is hilarious. The rotating mass is really low. It takes a bit of practice before you can get the car to move from a stop.

GT340 said
Logically I would assume that at a steady 4500 RPM you would get the same torque and horse power whether you were running an aluminum flywheel or steel one. Incorrect shifting techniques with an aluminum flywheel would lose torque and horsepower over a steel flywheel because of a potential drop in RPM when shifting. An aluminum fly wheel will rev MUCH faster than a steel flywheel. My question would be how many 10th of a second would be gained by an aluminum flywheel and on the street is it worth it?

Steady state - true, that is why the dyno sometimes lies to you (or neglects to tell you the whole truth). I used to regularly abuse a friend of mine in his 650hp 502ci Chevrolet with my little 440. You do lose torque and horsepower in transition. It takes torque to accelerate that mass. Torque*rpm = horsepower. On the street I can not see the benefit of the lighter flywheel.