Interesting thread as i just installed a lightweight flywheel and clutch in the car here. It is tracked often and agree that this setup, due to less mass, makes getting the car moving from dead stop a bit more challenging. Other gears are fine, as is first, provided the car is moving.
The car rev's more freely (faster) especially during the first three gears. The reasons for this upgrade was to lose weight while also adding durability as we are planning to Supercharge the engine. The stock clutch would not handle the extra power and while we were changing the clutch, changing the flywheel is easy.
Note: Have been told that this lowering of the clutch/flywheel mass could also have you adjusting the car's idle speed.
The below information is from a discussion that can be found on the FerrariChat discussion board, 308 section:
The Euro QV gear ratios found here:
http://www.ferrarichat.com/forum/sho...64&postcount=7
1st: 13.072
2nd: 8.996
3rd: 6.473
4th: 4.756
5th: 3.514
So.. for example. If you lost 1 lb. at 6" from the center of the flywheel, it would be effectively like losing overall weight from the car:
1st: 83 lbs
2nd: 40 lbs
3rd: 21 lbs
4th: 12 lbs
5th: 7 lbs
[ratio]^2 * [mass] * [distance from crank axis]
--------------------------------------------- + [actual mass lost]
[radius of tire]