FCub flywheel on a 154??

Sun Mar 04, 2012 2:21 pm

I been thinking and wondering if a fcub flywheel will fit an int154??

Does the fcub flywheel have more mass than the 154 flywheel?

If we added an fcub flywheel to an int154 engine thats more spinning mass that equals to a higher torque??? I'm thinking we could increase the mass by adding halfmoon weights to the clutch area on the fcub flywheel. Just thinking out loud for its and giggles. But while the engine is apart all the rotating parts need t6o be balanced together. I'm just thinking ahead for a toy down the road to play with at the fairs.

Re: FCub flywheel on a 154??

Sun Mar 04, 2012 4:22 pm

I think you'll find that the Cub flywheel is the same. Some have found flywheels off of C-60 engines that were used on Hay Bailers, which has a heavier flywheel, which is about an inch thicker than a standard flywheel, but I'm not sure if it will fit in the space given on a tractor.

Re: FCub flywheel on a 154??

Sun Mar 04, 2012 7:15 pm


Re: FCub flywheel on a 154??

Mon Mar 05, 2012 10:47 am

Most people find the numbered loboys have plenty of torque, but desire additional horsepower. (and power steering)
If you need more torque, add a second flywheel (and a safety guard) to the PTO.

Re: FCub flywheel on a 154??

Mon Mar 05, 2012 11:01 am

I can't think of a reason why a heavier flywheel would increase the torque of the engine itself, it would store some energy as inertia and may be enough to cause a noticable difference but I think it would take several flywheels to get to that level. For short bursts it may help, for longer bursts maybe not.

Re: FCub flywheel on a 154??

Tue Mar 06, 2012 4:53 am

I was thinking the same thing as Landreo. You do not get any extra torque from just a heavier flywheel. Torque is from mechanical advantage, for instance, inline engines typically produce more torque than V engines because all of the mechanical force is in one direction rather than two directions in a V engine. Adding weight to a flywheel or a heavier flywheel will help maintain constant momentum, but when the engine is stressed, and the flywheel slows down, you have no more torque than you would with a normal flywheel.

Bailers and other applications need the momentum of the engine to remain constant through surges in operation, like a generator. It is better for a generator to run at a constant RPM when it cycles on and off, and this is where a heavier flywheel will help to maintain a constant speed through slight loads on the engine.

In a tractor I do not think you will see the benefit. You may see or feel some slight advantage for very minimal periods of time, like when letting the clutch out initially the heavier flywheel would help overcome that initial grabbing of the clutch. However, if you were plowing or mowing, where the tractor is tasked for a long period of time, once the engine speed is decreased, there would be minimal positive benefit to the heavier flywheel.

Re: FCub flywheel on a 154??

Fri Mar 23, 2012 2:56 pm

I think the more spinning mass would increase the torque on the bottom end when we first start off too. I must keep in mind that increasing anything could cause problems somewhere else too. We get to a point were we need a larger tractor.

Re: FCub flywheel on a 154??

Fri Mar 23, 2012 4:04 pm

As far as adding half-moon weights: I have seen counterweights thrown from crankshafts of 300+ hp industrial diesels @ 2300 rpm, and you would not want to be around one when they let go. The counterweights are part of their design, and even those break sometimes. I would not recommend any such modification.

Re: FCub flywheel on a 154??

Sat Mar 24, 2012 9:18 pm

The extra weight would only bog down quicker and kill what little power the little engine does produce!---bigger tractor makes more sence! thanks; sonny