[ordy]

Hi



I have decided to get a RS Barn cat back exhaust, as it sounds the best, however hopefully you can help on my next question.



I have a clutch judder when in reverse so i am changing my clutch soon, i was thinking of fitting a RS Barn flywheel, how does it proform , i use the car mainly for road use, so it has to be useable in traffic etc.



Also they do a disc as well, is it worth fitting this at the same time.



Any help would be great, keep up the good work



Simon

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[PorscheDude]

The car I drove with RSB flywheel set up, IMHO, was much better than stock. I hate the clutch engagement with a DMF.

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[flash]

the factory disk is really not up to the job of a lightweight flywheel - if you drive the car hard, it will come apart (i have pictures) - it definitely won't last as long as it would against a DMF - it also rattles a lot - the spring center disk is designed to take the abuse and last longer and decreases the rattle



however, you MUST use the factory rated pressure plate with the rs barn flywheel, and not an aftermarket one or one from one of the local suppliers with a different clamping force - it must also be balanced, along with the flywheel - this means an extra day in the air, so prepare for that



end result is much better acceleration and smoother performance shifting

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[DiREW0LF]

How is the lightweight flywheel and spring disk on the 968 in comparison to a regular 944 or a 944 with a light flywheel? I love more speed but have the same concern as ordy with traffic and such. I know the 944 with the lightweight flywheel was a bit of a pain in traffic because the reduced mass made the car more prone to stalling.

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[rob76turbo]

Hey Flash,



How is the pressure plate and Flywheel balanced? While in the car....or what?

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[flash]

out - you have to take it to a balance shop - they first balance the flywheel, and then they bolt on the pressure plate and balance that to it



any lightweight flywheel requires a bit of sensitivity in your left foot - it also requires learning how to gear match and add a bit more revs on take off - this all becomes second nature very quickly though for most people - the 18lb rs barn unit is not nearly as much of a problem as the 12 lb fidanza though

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[DiREW0LF]

Learning to add more revs won't be as much of a problem as convincing the wife to let me spend the money.



Any suggestions?

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[flash]

tell her your fuel economy could go up, because the car will accelerate faster, therefore ALLOWING you to get off of the gas sooner

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[DiREW0LF]

Thats a good one!

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[DiREW0LF]

Flash,



Any idea what the cost will be to put new friction material on the lightweight flywheel (if its even an option)?

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[flash]

are you talking about replacing the steel insert?

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[DiREW0LF]

Yes... I wasn't sure what the material was.

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[flash]

well, i know it can be done, but shouldn't be needed for a very long time - also, it can be surfaced - i just had this done on one myself - of course it then needed to be rebalanced............

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[DiREW0LF]

So, I just told the wife I wanted the flywheel and disk. She said that I don't need it. I then said that this weekend she could drive it.



She wasn't amused. HAHA

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[94SilverCab]

My argument is that the DMF WILL need to be replaced. The SMF will never break...



I'll report back on the reaction...



Jay

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[PorscheDude]

Tell her the clutch is starting slip, and needs replacement.

Show her what the dealer charges for parts, then show her who much the RSB set up is.

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[ordy]

Thanks for the input



The balancing bit sounds a bit of a problem, i hard enough to find someone who knows there way around a standard 968, rather than a modified one.



Whats the down side if you dont balance the flywheel and clutch? i presume you dont have to balance the standard fylwheel due to its weight.?



When you say new pressure plate, that a oem from porche then?



While i am on does any one know if the RS Barn headers are ok for right hand drive models? steering shaft clearance etc.



Cheers



Ordy

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[flash]

do not install a single mass flywheel without balancing - period - besides unpleasant vibrations, bad things can happen, and you won't know it until it's too late



you can get away without balancing a DMF, due to its absorbing nature, but it can cost you a few horsepower - any energy absorbed by the unit is energy not transmitted to the wheels



you only need to locate a machine shop to get these balanced - any engine builder should know of one



pressure plate needs to be the oem from germany - the sachs unit sold over here, which is a superceded number, is not correct for this application - pete carries these as well



the header will not work on RHD

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[ordy]

Cheers Flash



Thought that may be the case with the headers.



I think i will start looking for a engineering company who can do it for me, on previous chats about lightened flywheels, some people mention gearbox rattles, is that a common issue?



Cheers



Ordy

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[flash]

it is - without dampening, the transaxle rattles - that's why the spring centered clutch was designed - it does some dampening, reducing the rattles a lot - i barely notice it now - used to drive me nuts when i had the oem solid clutch disk

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