Engineering Behind Lightweight Flywheel

Part 4

Discuss Between Weighted and Lightweight Flywheel Choices

· Lightweight Flywheel

DISCUSS BETWEEN WEIGHTED AND LIGHTWEIGHT FLYWHEEL CHOICES

With many performance flywheel choices onmarket recently, it could be impossible to understand all different itemsavailable. Some amateurs suppose that lightweight flywheel is always better, since it has lower MOI. But, lightweight flywheel is not always the best, depending upon specific application. This is also the reason why entities produce heavier weighted flywheels. In order to make it clear, let’s have a look at the differences between the two.

Z: Heavy flywheel enables transition from standstill to operationeasier. This indicates drivability on street can be safer and smoother. Reducingweight can reduce time it takes to reach maximum RPM, which is better for the majority of road racing and off roading applications. However, everything has two sides. The lighter the flywheel is, the faster it reaches the highest RPM, but this also indicates the harder it is to start from standstill. Good for road racing application, but not good on street or drag strip. In drag racing, too light flywheel can not slow the engine enough to allow for up-shifts.

N: How specific application responds to driveline inertia isdepending upon car weight, gearing and engine power curve. In the meanwhile,amateurs have to prioritize performance and drivability. Some may prefer maximum power gains and select lightest unit, but some may prefer most stock-like drivability and select stock weight or slightly lighter flywheel. When using light flywheel, many applications have little-to-no drivability disadvantages.

Testing and previous experience tells ushow to get maximum performance gains while maintaining drivabilityrequirements. Loss of lightweight flywheel’s momentum can make clutch engagement feel more aggressive. The other possible drivability disadvantages is noise, notably in a dual mass flywheel application, in which dual mass flywheel is used to dampen the driveline. Single mass billet performance flywheel can not dampen as well, so allowing noise and resonance.

D: Despite lightweight aluminum flywheel is sufficient in somecertain instances, some amateurs may need flywheel with more mass, or one thathas less mass than standard aluminum lightweight flywheel. The majority of lightweight flywheels can be used in street vehicles and racing applications. These can be found in drag racing applications.

Ultra lightweight flywheels that aredesigned specifically for racing applications proves to be too light for streetuse, and can cause harmful impacts in regular stop and go driving or traffic like stalling or high revving starts.

As a result of loss in mass, your drivinghabits require changes, which can be a little bit irritating for daily use. Heavierflywheel, such as billet steel one, can be helpful for carrying momentum of vehicle in larger vehicles. These kinds of cars need more weight to maintain proper idle and to get momentum to move off the line. Some drag racers prefer extra weight in launching off the line. This turns out to be specific flywheel application and is not used on road or in track vehicles, since the extra weight is unnecessarily needed in higher revving applications.

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