Vibration Help Needed

New flywheel

Here is a shot of the new clutch.
I noticed when I removed the ZF, that the weights were not centered, but they are loose anyway, so I don't think that had anything to do with it. The flywheel only gets bolted on one way, so I didn't screw that up. I'm stumped. I think I'm going to put the original stuff back in. I've got to get this thing going for Pocono.. Suggestions?

New Clutch

How do those weights on the wire ring get centered when it spins? It would be off balance if it was not centerd, no??

Will, where's the imbalance weight on the new flywheel?

That looks like a "zero balance" flywheel to me, designed for an internally balalnced motor.

cowboy from hell

That's the way it came. Aren't the holes there for the imbalance, or are they for 0 balance?

The part# is for 28 oz imbalance. Maybe they put the wrong one in the box??

I've not worked with a Centerforce flywheel or clutch myself. But it looks to me the holes are for balancing. There should be a weight atttached to the flywheel if it were designed for external balance.

I've seen other brands that have a removable weight so it can be used for either. I'm hoping someone on the board can identify this part if they've installed one recently

Not only are you showing us the engine side of the new flywheel and it has no counterweight you are showing me a stock flywheel that appears to have been rebalanced.

Is this the original untouched engine?

The engine balancers here don't want to take the weight off of the crankshaft. That's too much like work. I'm sure they are the same everywhere unless you specify.

They take the weight off of the flywheel and the dampener.

Of course if you are smart like me you show him your M-15 with the full milatery clip and say DON'T TOUCH A DA FLYWHEEL AND DAMPENER OR BOOMA!
A 12 ga pump works too.

Incidentally, your stock flywheel should work with the clutch with no problem. Even if it needs to be redrilled, at least three of the existing Long pressure plate holes will line up.

If that is the Pantera Centerforce application you don't have to redrill anything in the stock flywheel.

The motor is far from original, but the flywheel is stock.
I went with the new flywheel because I didn't want to mess with the redrilling. The clutch doesn't bolt up to the old flywheel

I have the same setup in my car. I believe that if you lay the presure plate on the old flywheel you will be able to alighn three holes which will center the pressure plate.

It will also locate where the new holes will need to be drilled to mount it.

If I can do it, anyone can.

Even if you can't, it is a simple job for a machine shop to perform, not expensive. It will not effect the balance of your flywheel.

It sounds like the engine was rebalanced. As I said the balancer usually will take weight out of the flywheel and the dampener.

This makes both of them not replaceable without rebalancing the entire reciprocation assembly.

The simplest solution is send the new flywheel back and use the old one.

The rectangular shape cast into the old flywheel that is maybe 1-1/2" x 3" is the counterweight. Notice how the new one is missing that?

quote:

The rectangular shape cast into the old flywheel that is maybe 1-1/2" x 3" is the counterweight. Notice how the new one is missing that?

I lined up the holes exactly and laid the old flywheel over the old. The holes drilled in the new one are 180 degrees from the old counterweight. Perhaps this is the way they are making imbalanced flywheels now? Instead of adding a counterweight, they remove weight from 1 side?
Will

I don't know how much one would need to remove but yes that is possible. It is also a lot of metal.

What you are going to find is that the "balancer" is going to tell you that he can't match the balance of the flywheel you give him to match, you need to give him the entire assembly.

What "they" are doing with balancers is they add the counterweight to a neutral balanced unit.

That is what George suggested might be the story with the flywheel but it isn't obvious as to where it gets added to.

I am willing to bet that the original flywheel has been rebalanced to match different rods, pistons, and maybe crankshaft. Take both flywheels to a good automotive machine shop that does in-house balancing and ask them to match the balance of the new flywheel to the original one. They can do it and it needs to be done or your engine will be short lived.
Forest

quote:

I am willing to bet that the original flywheel has been rebalanced to match different rods, pistons, and maybe crankshaft. Take both flywheels to a good automotive machine shop that does in-house balancing and ask them to match the balance of the new flywheel to the original one. They can do it and it needs to be done or your engine will be short lived.
Forest

I reinstalled the original flywheel and clutch today. I'm getting good at this. I did it myself in 3.5 hrs!. The car ran smooth. Feels good smoking the tires at 40mph!
The new flywheel is misbalanced or the original has been modified as suggested. Either way, I'm going to have everything match-balanced after Pocono, then reinstall the components.
Will

3 1/2 hours!!! I'm mighty impressed! When I took out and replaced my ZF after a rebuild I really struggled. I had a hell of a time getting the center splined shaft aligned with the pilot bushing so that the ZF would slide on. Just couldn't get the angle right with the back of the engine jacked up enough to get working room. Glad things worked out.
You da man!
Mooso