Aluminum Flywheel?

[dsobering47]

I know I ask a lot of dumb questions, so I will ask another one: What are the main pros and cons of buying a performance flywheel. Particularly, the flywheel available from Bavarian Autosport, for a 1987 325is.

Thanks

 

[Inline_6]

Lighter flywheels allow the engine to rev much quicker. This is good for road racing because the engine is always in the upper rpm ranges. However, normal driving with a light flywheel & high rear end gear ratio doesn't go well. Flywheels store energy. If you have a heavy flywheel and rev the engine & let the clutch out fast, the stored energy is released and the wheels spin until all this stored energy is expelled. Then it's up to raw engine horsepower to maintain wheel spin. In short, you gain quickness in the revs on the track. Driving on the street with a light flywheel would be fun in the snow & ice hehe, just kidding. The engine would light up lightening fast and be a blast if the tires didn't grab. Normal driving though would be tricky, lots of clutch slipping to get going. Sand buggies have light flywheels because they can easily spin the tires and keep the engine reved up. Some people claim heavy flywheels cost horsepower while other people say they don't. A heavy flywheel certainly helps launch a heavy car but further down the track it turns into a burden. A light flywheel doesn't assist the launch as it doesn't have enough stored energy to help, but down the track it's not costing horsepower to spin. Basically I'm saying. If you lighten the car several hundred pounds and change the gear ratio to somewhere in the 4:11-1 area. A light flywheel would be a good thing.

 

[dsobering47]

thank you, i appreciate it