lightened oem flywheel...?

Post by **s4woody** » Sun Jan 29, 2006 10:36 am

hi peeps ive been doing sum digging and although most people live with it most dnt want it ..(confused)..and thats the rattle caused by an alloy flywheel at low revs..

so me,s been thinkin.. when i was alot younger and into tuning my escort i had my clutch and steel flywheel assembly lightened and balanced. it mite not ave been as light as alloy but it was light, now i was running a straight cut gear set and at low revs got no rattle/chatter..has anybody gone down this route??..i dnt wanna sacrifice torque or gain a rattle/chatter but i do want a crisper/quicker revvin car

Post by **DavidT** » Sun Jan 29, 2006 10:41 am

I have just put a Tanoga lightweight flywheel on my S4. You do get gear chatter at low revs under load.

I have adapted my driving style a little and can live with it for the performance gains it gives, no problem.

The standard flywheel is dual mass which means it damps the geartrain, removing the chatter so I don't reckon you will get this with anything modified.

Post by **confusionhunter** » Sun Jan 29, 2006 11:37 am

Hmm, The dual mass might be a problem for the machine shop to lop chunks out of it... I have a spare so I might take taht down to a machine shop that did my VW flywheels.

How much for the tanoga one BTW?

Post by **DavidT** » Sun Jan 29, 2006 11:58 am

£ 400 + VAT I think.

There was a post on here ages ago where the guy had lightened an OEM RS4 flywheel. I think he'd made it single mass though.

Post by **s4woody** » Sun Jan 29, 2006 1:04 pm

well i seem 2 remember that my oem flywheel on my escort weighed heaps but once the guys at my machine shop got hold of it it was lighter and well balanced...worth a go i think..

Post by **dummi** » Sun Jan 29, 2006 11:01 pm

or save for internals balanced that would give some good rpm's

Post by **DavidT** » Sun Jan 29, 2006 11:15 pm

s4woody wrote:well i seem 2 remember that my oem flywheel on my escort weighed heaps but once the guys at my machine shop got hold of it it was lighter and well balanced...worth a go i think..

You should search for the thread I mentioned.

Like I said, it will end up single mass which has its drawbacks, I think the OEM flywheel is 12kg and a lightened one is nearer 6kg

Post by **s4woody** » Sun Jan 29, 2006 11:50 pm

i,ve had a look for that thread and cant locate it david..if u find it can u send me a link pls...

Post by **Golich** » Wed Feb 01, 2006 12:28 am

I've aksed this before. How does this dual mass flywheel work. I'm a mechanical engineer but I've never heard of this before so don't hold back on the theory

Post by **Golich** » Wed Feb 01, 2006 12:35 am

PS I would think lightening an OEM flywheel in principle is not a bad idea. However, it all hinges on the what exactly this dual mass thing is. In thoery its easy enough to calculate the difference in inertia removing metal will cause. Its a wonder a compromise couldn't be sought on the low rev rattle. Like not lightening the flywheel quite as much.

Of course I've no idea how much testing went into any of these lightened flywheels on offer.

Post by **dummi** » Sun Mar 05, 2006 11:18 am

did anyone get this done to the rs4 oem dual mass flywheel? i have one and thinking of doing it but i don't want to have it made in to the single mass, i couldn't live with it daily..

Post by **Golich** » Mon Mar 06, 2006 12:59 am

I've not read of anyone try this.

Now that I understand what/how a dual mass flywheel works its highly unlikey they'll be sufficeint material on the stock dual mass flywheel that could be safely removed to make a significant difference.

But hey you've got one. Could you post some pics of both sides of it to I see what the Audi version looks like.

You could always consult and proffessional motor sport engineering shop. Make sure they have a guy qualified who can calculate how much can be removed without the wheel breaking into pieces! Not just someone that can operate a lathe!

Post by **tartan_rob** » Mon Mar 06, 2006 10:43 am

What kind of obvious differances (good and bad does a lightened flywheel make to day-to-day driving?

Post by **dummi** » Mon Mar 06, 2006 12:35 pm

Golich wrote:I've not read of anyone try this.

Now that I understand what/how a dual mass flywheel works its highly unlikey they'll be sufficeint material on the stock dual mass flywheel that could be safely removed to make a significant difference.

But hey you've got one. Could you post some pics of both sides of it to I see what the Audi version looks like.

You could always consult and proffessional motor sport engineering shop. Make sure they have a guy qualified who can calculate how much can be removed without the wheel breaking into pieces! Not just someone that can operate a lathe!

those are some good points there isn't that much material, dual mass from what i understand works like two masses spinning next to each other and balance out any vibration in them its like two big dinner plates stuck together where the single mass is just one.. so it makes sense the single mass would be much lighter, does make me wonder whether it is worth doing as i want to keep it reliable, i'm suprised its not been done before but i guess those that want it done go for single mass as a more effective option, thanks for those tips will have me thinking

my big fear yes 'Make sure they have a guy qualified who can calculate how much can be removed without the wheel breaking into pieces! Not just someone that can operate a lathe' so i ask if anyone has done this to the oem and retained dual mass with success and where they had the work done

Post by **rolskii** » Thu Mar 09, 2006 1:03 am

Golich wrote:PS I would think lightening an OEM flywheel in principle is not a bad idea.
Its a wonder a compromise couldn't be sought on the low rev rattle. Like not lightening the flywheel quite as much.

Maybe go for a larger front crank pulley with a hefty damper built in - would surely quieten it down ..... but then again your adding rotational mass ......

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