What's the deal with the flywheel?

[John Bennett]

When I was checking my clutch disc for wear, I noticed the flywheel seemed to consist of multiple discs, with an inner spinny bit :confused: Can't find a description in the service manual. Anyone know what it supposed to be/do?

Also, is an S14 clutch & cover compatible (when the time comes to replace it).

Cheers,
John

(doing his bit to put some posts in this quiet section :D )

[Yingtong]

I'm a little confused on the description of the flywheel, any chance of a picture to help things along?

[MeLLoN Stu]

yeah john's confusing when he uses his super techy lingo :D

[Kuddy]

the S15s got a dual mass flywheel.

And here's some further reading:

3.20 Can I buy a clutch for my S15 which suits a SR20DET, e.g. from an S13/S14 Silvia/200SX?

No. The first thing you need to know is that the S15 has a dual mass flywheel. This means the clutch plate and flywheel are put together differently to the S13/S14 gearbox/flywheel combination.

The dual mass flywheel is sprung in the middle which is designed to reduce harmonic vibrations induced from rotational idle of the flywheel. Other benefits are supposed to be smoother driving and easier gear changes.

Because of this, you will need to either buy a clutch which is a solid centre and is suited to the dual mass flywheel. Alternatively, change the flywheel to a solid centred design and have a clutch which is sprung (as in the S13/S14).

Many S15 owners have converted to sold centre flywheel design and have had no difficulties or adverse side-effects. However, it is possible that you hear a whining noise which is the result of harmonic resonance is the flywheel is either not correctly installed or designed. This can also be cause by the build of the gearbox. This is an unlikely outcome, but one you should consider nonetheless. To overcome it, you will need to take the flywheel back to the place of manufacture to see if they can work something out.

[Yingtong]

Nice one kuddy :thumbs: :notworthy

[John Bennett]

http://img.photobucket.com/albums/v602/bshyrigh/flywheel.jpg

Bugger. Yet more bits that'll be a battle to get hold of :indiff:

[MeLLoN Stu]

get a fidanza from bren :nod:

[MeLLoN Stu]

also might be worth having a word with cookie for future reference, i believe he has nissan contacts in Japan or ways of getting JDM stuff anyway :)

[Matt_T]

you can get a complete ORC S14 clutch and flywheel kit for £500ish. from reading that bit above it would seem that that would be all you'd need to convert?

[John Bennett]

£500 :eek: Think I'll keep the dual-mass flywheel and source a suitable clutch for it :)

[Matt_T]

yeah, its alot. but less than the sepaerate clutch and flywheel combos most go for. spose theres nothing stopping you getting a used stock S14 flywheel and OE plate and cover either?

[John Bennett]

Unfortunately I don't think the 6-speed box will fit with an S14 flywheel :( (think I read it on Freshalloy).

[Phill]

That sounds like the flywheel that is fitted to the R34 GTR . . .