Alfred996c2

Hi all

Just curious for those with a LWFW - do you get extra chatter/noise when pulling away in high gear at low revs?

My LWFW appears to have an exhaust type vibration when in the 'wrong gear'

Thanks

jobyt

That might be a harmonic issue that will eventually lead to a broken crankshaft. I'd be willing to bet dollars to doughnuts that you experience some vibrations at certain revs that 'smooth out' above that range regardless of gear...might want to think about going back to a dual mass flywheel.

Porschetech3

Yes with a LWFW you will get a lot of transmission noise when you "lug" the engine . Same sound you will get it if the dual mass flywheels locks up/ fails..

You will also get a lot of clatter in the transmission in neutral with the clutch out at idle..

Alfred996c2

So business as usual and avoid low revs in high gears.....?

Porschetech3

Are you willing to change it for less noise and potential for harmonic vibration damage?/

Alfred996c2

Are you referring to harmonic vibration damage to my ears or the car? I hadn't appreciated that a LWFW actually causes damage.....?

GC996

Alfred, what's your goal with adding the LWFW?

Porschetech3

Same thing occurs when a dual mass flywheel locks up, it causes noise and looses its ability to dampen harmonic vibrations..

Most people when given the choice will chose to replace the dual mass flywheel when this occurs just for the noise alone even though they could continue to drive the car with the harmonic vibrations undampened and be the same "risk" as a LWFW but without the weight reduction/increased engine braking

Harmonic vibration is a very scientific subject and can have very unexpected behaviors , have you ever dealt with harmonic vibrations??

Alfred996c2

Interesting - I haven't dealt with Harmonic Vibrations before.

The car came with a LWFW so just something I am getting used to. I suppose the question is, should I change it to a DMFW?

I am getting used to the noise of it, and its fun to drive with the faster changing rev ranges - I just want to check I am not causing damage in high gears at low revs

If the above is a normal characteristic then I suppose there is more to get used to with the car....

Alfred996c2

It came with the car...... I liked driving with it on the test drive - but we didn't sit in traffic when the car was warm so I never noticed the chatter.

I am used to it now, but want to check what the best/most suited driving style is for a LWFW

Paul Waterloo

I had a LWFW on my 951 (came with the car), that was my first, and I can say I didn't really like it. I like the feeling of a heavier flywheel much better. $0.02

996C438

My 3.6 in my Boxster S has a LWFW . But when the engine was built all the rotating mass was balanced to race spec . I do get gear clatter at idle with foot off the clutch . Other than that I have never noticed any additional noise . The race balance makes a huge difference .

Sam-Son

If the noise of a LWFW bothers you, you don't need it

also for what it's worth... they aren't really recommended on M96s

JohnCA58

I would like to know how it would perform with a fluid dampener on the front.

ltusler

Unless they are fully balanced during a rebuild. Also you will have gear chatter at idle with clutch out.