Jake Posted June 1, 2006 Share Posted June 1, 2006 This car I bought the other day has an OS Giken clutch and a lightened flywheel, supplied and fitted by Whifbitz, I think. The clutch is a bit fierce for my tastes but I'll get used to it, however I don't think I can live with the lightened flywheel. It sounds awful to me and I'm already getting bored of explaining to folks that no the car isn't about to fall to bits (I hope) So, what I want to know is can I use this OSG clutch with a stock flywheel? Or do you have to use the flywheel that is matched to the clutch? Is there any reason that using a stock Toyota flywheel and a OSG clutch would be a bad idea? Thanks ps, Paul Whiffin, if you see this thread, do you happen to remember what flywheel is fitted? I think Mike said it was also an OS Giken one. Thanks mate. Quote Link to comment Share on other sites More sharing options...
Lucifer Posted June 1, 2006 Share Posted June 1, 2006 It is an all in one unit. see here:- http://www.osgiken.co.uk/racingclutches.asp?do=model&modelid=7&manname=Toyota&modelname=Supra Quote Link to comment Share on other sites More sharing options...
Jake Posted June 1, 2006 Author Share Posted June 1, 2006 It is an all in one unit. see here:- http://www.osgiken.co.uk/racingclutches.asp?do=model&modelid=7&manname=Toyota&modelname=Supra I'm slightly embarrassed to admit that I don't know what I'm looking at there Martin. I assume that you saying it's an all-in-one unit means that I can't use a stock flywheel, right? Are all uprated clutches like that? Quote Link to comment Share on other sites More sharing options...
Lucifer Posted June 1, 2006 Share Posted June 1, 2006 No only plated clutches are like that. THe OSG range (which we now stock cheaper then RRP (shamless plug)) are great clutches . Do you not like it? Quote Link to comment Share on other sites More sharing options...
Lewis Posted June 1, 2006 Share Posted June 1, 2006 lol @ shamless. You sure it isn't a sham? Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted June 1, 2006 Share Posted June 1, 2006 Im afraid yor stuck with it unless you use a similar setup to mine or raise the idle to around 1K which is supposed to make it better. The noise you are hearing is apparently the idle gear as its not getting any damping from the flywheel anymore it rattles. Ive gone the lightened flywheel way before.. I managed 2 months and it was out.. Ive spoken to a few people running the RPS Carbon Carbon and they have reported a MUCH better result.. The noise is still there but no where near as loud or frequent. Quote Link to comment Share on other sites More sharing options...
Jake Posted June 1, 2006 Author Share Posted June 1, 2006 No only plated clutches are like that. Do you not like it? I'm OK with the clutch itself, it's the flywheel rattle that I don't like. So what are my options if I want a proper weight flywheel, replace the whole lot? Quote Link to comment Share on other sites More sharing options...
JamieP Posted June 1, 2006 Share Posted June 1, 2006 depends if its a push or pull clutch, mine only rattles when the clutch is pressed down, but its bloody loud. i hope my new exedy clutch aint as bad:) Quote Link to comment Share on other sites More sharing options...
Lucifer Posted June 1, 2006 Share Posted June 1, 2006 All OSG's are backwards I tell ya! But come with all teh hardware needed. Quote Link to comment Share on other sites More sharing options...
Ulrik Posted June 1, 2006 Share Posted June 1, 2006 Have a TRD Twin Plate Clutch , rattles also a bit, but the HKS one rattles even more.... Quote Link to comment Share on other sites More sharing options...
Jake Posted June 1, 2006 Author Share Posted June 1, 2006 So what are my options if I want a proper weight flywheel, replace the whole of the OS Giken clutch? Quote Link to comment Share on other sites More sharing options...
Miguel Posted June 1, 2006 Share Posted June 1, 2006 yup Quote Link to comment Share on other sites More sharing options...
Jake Posted June 1, 2006 Author Share Posted June 1, 2006 Bummer In that case I'll live with it for a while. Quote Link to comment Share on other sites More sharing options...
Miguel Posted June 1, 2006 Share Posted June 1, 2006 Might aswell wait till you can spank the arse of it a ware it out before you reaplace it. Get your moneys worth out of it No-one can hear the rattle at 180! Quote Link to comment Share on other sites More sharing options...
CJ Posted June 1, 2006 Share Posted June 1, 2006 Is the benefit of a lightened flywheel just weight saving or are there other benefits too? Quote Link to comment Share on other sites More sharing options...
Jake Posted June 1, 2006 Author Share Posted June 1, 2006 It enables it to rev quicker Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted June 2, 2006 Share Posted June 2, 2006 also loses interia on the gear change. I hate the rattly FW's. People have a nice car, then they install a FW that sounds like a tractor in traffic. Been there, and wouldnt want it again. Quote Link to comment Share on other sites More sharing options...
CJ Posted June 2, 2006 Share Posted June 2, 2006 also loses interia on the gear change. Sorry to sound a numpty but what does that mean? Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted June 2, 2006 Share Posted June 2, 2006 it loses engine inertia faster. The revs drop a lot faster between gear changes with a Lightened flywheel. Quote Link to comment Share on other sites More sharing options...
Digsy Posted June 2, 2006 Share Posted June 2, 2006 Inertia is a rotating body's tendancy to resist changes in speed, so a lightweight (low inertia) flywheel will (a) spin up more quickly and (b) lose revs more quickly. If you want to do fast gearchanges in a manual car the last thing you want is to be waiting for your engine revs to change. What is sometimes overlooked is that a large clutch friction plate also acts as a kind of unintentional flywheel for the gearbox input shaft, which means that when changing gear the gearbox input shaft can still be rotating at a fair old lick, so when you bring the clutch back up it puts stress on the synchros. Quote Link to comment Share on other sites More sharing options...
CJ Posted June 2, 2006 Share Posted June 2, 2006 Thank you guys. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 2, 2006 Share Posted June 2, 2006 It's not the flywheel per se that rattles, it's the gearbox. The stock dual mass damps out gearbox harmonics, but weighs a ton. All aftermarket, none dual mass ones "cause" gearbox and geartrain noise. As far as the clutch is concerned the Giken ones are very good, as is the quality of their flywheels. They aren't normally fierce, either, unless it's a triple plate? Quote Link to comment Share on other sites More sharing options...
LeeT Posted June 2, 2006 Share Posted June 2, 2006 you couldn´t hear my flywhel chatter could you Jake? i just raised the idle to around 1k rpm. i couldnt stand the sound either Quote Link to comment Share on other sites More sharing options...
Jake Posted June 2, 2006 Author Share Posted June 2, 2006 Giken ones aren't normally fierce, either, unless it's a triple plate?No, it's a dual plate one. you couldn´t hear my flywhel chatter could you Jake? i just raised the idle to around 1k rpm. i couldnt stand the sound either I didn't notice any excessive rattling on yours mate. I'd be very happy if mine sounded like yours. My idle is already around 1000rpm though. Quote Link to comment Share on other sites More sharing options...
TLicense Posted June 2, 2006 Share Posted June 2, 2006 My RPS one rattles like a b'stard. Something I've just gotten used to I guess. Quote Link to comment Share on other sites More sharing options...
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