lightened flywheel

[rjc157]

going to have the flywheel lightened as my winter project does anyone have the spects how much to take off and being ignorant to it which side this way i can direct the machine shop,also the reason why i don't have it sent out is because it would cost more to ship back and forth than what the cost would be thanks guys

 

[wangdango]

A lot depends on which car flywheel you are talking about. On the 100/4's, the flywheel has a large area that protrudes, that can be removed. A better way to go is to go with a BJ8 flywheel and have a machine shop remove 10lbs from the area that does not contact the clutch. Most machine shops have done flywheel work and should have no issues helping getting this done.

 

[rjc157]

sorry its for a bj8 and are u talking about taking off from the front side where the clutch goes

 

[wangdango]

IT can be removed from either side, but not where the clutch disk contacts it. It should also be balanced once the material is removed. You should be able to see where it was balanced before, (holes drilled). As a rule of thumb, all the moving parts, (flywheel, clutch disk, pressure plate, crank) should be balanced

 

[rjc157]

trying to get in touch with you i'm in ny also do you know of a machine shop that has experience in lightening a flywheel

 

[wangdango]

We had Peter Genovese do ours, he is up in Highland Ny, 845-384-6073. He has a vast knowledge of Healeys. We just got back our engine for our 100m vintage race car that he put together for us. He can do anything from fabrication, painting, machine work, etc.

 

[TimK]

I took off my flywheel to install a rear main oil seal. I put it back on 180 degrees off without knowing about the need to have the #1 stamped on the flywheel at the top when at TDC. I then had a bad vibration between 2500 and 3000 rpm. When I later discovered the need to put the flywheel back in the correct position (I had before and after pictures that showed the change in position) and did so, the vibration disappeared. My question with a lightened or new flywheel, how do you get it balanced to the engine (crank, pistons etc.)? In other words, it seems that the flywheel was out of balance to offset other components out of balance.

 

[Randy Forbes]

I've had (both) dampeners and flywheels matched to components that were removed; the removed part was "read" for balance, and the new one brought as close to that as possible.

Probably not as 100% perfectly balanced as doing it all together, but it's "saved" the balance job on more than one (>1) engine I've worked on.

 

[TimK]

I've had (both) dampeners and flywheels matched to components that were removed; the removed part was "read" for balance, and the new one brought as close to that as possible.

Probably not as 100% perfectly balanced as doing it all together, but it's "saved" the balance job on more than one (>1) engine I've worked on.

Very clever, Randy!

 

[EV2239]

The biggest out of balance force in these engines is the clutch. It will always introduce vibration if a new one is fitted without it and the flywheel being balanced together.

Austin dynamically balanced the Healey engine and so it's surprisingly smooth when is is done.