light weight flywheel

[e30 gangsta]

k thanks for the help...

[e30 gangsta]

how about clutch kicks???? like dumping the clutch will it make the flywheel fail faster becuase its lighter???

[Digitalwave]

I don't think flywheels really fail, but clutch kicks will make the clutch not last as long.

[EverWiser]

The flywheel, because of its weight, acts as a damper. It smooths things out when accelerating and due to its spinning weight smooths your deceleration. Equate a lightened flywheel to how a motorcycle behaves: when you get on the gas you GO right then; when you let off you slow down right then. Lighten the flywheel in your car and you accomplish the same thing. Only thing I would see as detrimental is that steady state cruising will not feel as smooth (so if you spend lots of time in your car for longer trips the jerkyness might get old) and the drivetrain will be "shocked" more often due to the lower dampening effect of the lightened flywheel so there may be some long-term reliability issues with "stock" components. Just my .02...

[Digitalwave]

steady state cruising will not feel as smooth (so if you spend lots of time in your car for longer trips the jerkyness might get old) ...

I've actually noticed that in my car, its not bad and/or bothersome to me though.

[e30 gangsta]

k thanks... and of course it kills the clutch....

[e30 gangsta]

im such a noob...

[Sean]

I was under the assumption that my 1988 325, Super Eta, manufactured in early 87 I believe, had a dual mass flywheel.

I got a clutch for this, so hopefully that's correct.

I read that you can switch to a single mass flywheel? What does this involve? I could easily get ahold of a 325i flywheel - but if I did this, I'd need a different clutch too, wouldn't I? What else would I need to change?

Thanks! ;)

[Digitalwave]

I was under the assumption that my 1988 325, Super Eta, manufactured in early 87 I believe, had a dual mass flywheel.

I got a clutch for this, so hopefully that's correct.

I read that you can switch to a single mass flywheel? What does this involve? I could easily get ahold of a 325i flywheel - but if I did this, I'd need a different clutch too, wouldn't I? What else would I need to change?

Thanks! ;)

You can use the single mass if you get a clutch and throw out bearing for the single mass.

[88325isboy]

about how did it cost you guys the machine shop down the street from me said he would do it but he didnt know a price to charge me. what side of the flywheel do thet shave off?
-Bobby

[BS87]

If the guy doesn't know how to resurface and lighten a flywheel, i personally would not take it to him. I dont like taking chances with driveline components.

[88325isboy]

ya true that but i was going to get one from the junkyard and let him try to do it. but i might just send it to Jim Rowe. he said he would give me a good deal on it.
-Bobby

[e30vert]

I once caught an 8 pound trout. :)

[Joey]

..That's nice.
Does nothing need to be adjested for clearance or anything when retrofitting a single-mass flywheel and matching clutch assembly to an early Eta?

[cthulu703]

The chatter is common for LTW flywheels, I'm not exactly sure what causes it, but every car I've ridden in with one chatters when the clutch is disengaged. It's raw as hell. :twisted:

Is it possible that the crank/flywheel assembly is balanced from the factory and when the flywheel is lightened the system becomes unbalanced? Do you notice resonances in the gearbox sound with the lighter flywheel? At first impression, I would think that the extra gearbox sound is probably from radial loading of the input shaft of the transmission. Either due to an uncentered, balance flywheel or a properly installed unbalanced one. To the people who had their stock, single mass flywheels lightened: did you have them dynamically balanced afterward? I personally, would not put a lightened flywheel on my car that had not been balanced, as it will hurt your motor, especially at higher RPM's.