[foolishme83]

By increasing the weight of the flywheel in the g13a will I increase torque?

[Gwagensteve]

No, you'll just increase inertia, which can feel like torque is increased, but the engine doesn't produce more, the engine just feels less like it's being affected by changes in load.

Steve.

[foolishme83]

Would it increase or decrease fuel consumption? Would there be any benefits at all?

[Gwagensteve]

No. It won't decrease fuel consumption. The benefit is reduced surging and lunging at low revs/small throttle openings off road. The disadvantage is reduced throttle response.

In short, the effect is an engine that's less willing to change speed, but more willing to maintain speed. THat has nothing to do with fuel economy or measured torque, it's all about inertia. It will help the motor feel a bit like a larger one. However, if it does start to bog down or labour, it will be harder to pick back up, again, because it's harder to get the engine to change speed - it has to accelerate the heavier flywheel.

Steve.

[damagera]

yes ... like gwagensteve said,,a flywheel wont produce torque BUT it will store it,, thats why revheads shave and lighten flywheels ..to produce more throtle responce.. but doing that you rob peter to pay paul..down side is your car will smell hills and you will lose inertia WAY sooner

[johnmath]

It depends on how may flies are around to work the fly wheel. At Oodnadatta you can expect a significant torque increase, provided you can get all of the flies buzz in the same direction. A bit of off meat on one side of the engine bay might help

[Marko_SJ]

A flywheel weight is a common modification for motorbike riders who ride tight and slow technical trails, and ones who want to tame the power delivery of an aggressive engine.

I don't reckon its worth bothering with for the increased inertia, even though the theory does work in practice. Obviously aggressive engines are a non-issue to us.

[foolishme83]

That makes sense now. I was looking at some early "hit and miss" stationary engines, They generated a lot of torque and very low rpm so thought I may have been on to something. Thanks guys

[Gwagensteve]

In the case of a bit and miss motor, the heavy flywheel is used to smooth out the torque pulsing- the engine only fires once per 2 revolutions. Same thing with bike motors.

Torque is always averaged- a sierra averages 100nm for a revolution, but only two cylinders fire in each rev. A heavy flywheel helps to smudge the pulses together.

Steve.

[Jezza86]

also handy on a generator where you want 50Hz, not 48 one second, 53 the next...