[Apex Rex]

I just finished installing a RS Barn flywheel with a stock Sachs clutch/pressure plate kit today. I took the car out for a test-drive, and I didn't go back home for an hour! I love the new feel, and the difference between stock is night and day. The only downside I see to it is that I have to relearn my heel-toe pressures, as the revs drop a lot quicker when the clutch gets pushed in. I don't mind the noise/vibration between 1800-2400 rpm, especially since the car will only be used as a track car starting in about a month.



I'm really looking forward to how the flywheel performs once i put a few more break-in miles on it.





Thanks Pete and RS Barn for continuing to support these amazing cars, and taking on the development of such great parts such as your flywheel!

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[xrad]

anyone have any trans or engine or torque tube damage associated with the noise/rattle/vibrations from a lightened flywheel?

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[flash]

valid concern



not yet that i know of with his or the fidanza unit



i have about 25k on my 12lb fidanza unit and no issues there - fragged a clutch disk though, which is why i came up with the new spring centered one, with improved friction material



the rs barn unit should be even less subject to issue - remember too that it is the same weight as the motorsport unit - with as much focus as they placed on balance of the engine, i would think they looked into that - pure speculation though, as they never really raced that unit, and so there isn't a lot of data to work with

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[Mark]

I notice very little noise or vibration from my RSBarn flywheel and I'm not particularly concerned.

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[Lord_Galva]

So the RS one is lighter?

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[Mark]

RSB is lighter than stick and heavier than the Fidanza

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[Cloud9...68]

[quote name='Mark' post='53354' date='May 26 2008, 05:26 PM']I notice very little noise or vibration from my RSBarn flywheel and I'm not particularly concerned.[/quote]

Do you have the solid or the spring-centered disk?

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[xrad]

Thanks.



you guys using spring centerd organic discs with the RSB flywheel? Findanza?

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[mrmister]

Just got my car back today after almost 4 weeks of being out of commission. Clutch blew up within 6 months of buying this car. San Francisco car just about to hit 90k miles so it was due for a new one.



I had pretty much everything replaced while I had her opened up. RSBarn LWFW, Flash's Disc, pressure plate, throwout bearing, stainless steel clutch hose, rear main seal, all hardware, slave cylinder, some more bearings, fluids replaced and other random stuff.



Total cost me 2800 for all parts and labor. I have just driven around about 20 miles, but so far I like it. The rattle is noticeable but only if you let the RPMS drop on deceleration. Really doesn't bother me as I can pull it out of gear before then and probably never hear it. Not that loud anyways. Clutch engages much quicker than my old one. Seems like less throw. Feels much better than my old one for sure. I used to have a strange lag in first gear from a standing start, but that isn't very noticeable anymore. I did manage to kill the engine driving home from the shop while wearing sandals, on a big hill from a stoplight.....woops. The only thing I was disappointed about was the time it took for delivery. Both times I have ordered from RSBarn they didn't get my items shipped out when they said they would. My mechanic got a bit mad at me because the car was in there waiting for parts.



I have some pictures of the flywheel and disc, but I don't see a picture upload spot here.

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[xrad]

use 'add reply' and then 'browse...' select and upload (size matters w/pics)

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[mrmister]

ok 2 week update. Now I have actually driven a bit with the clutch.



I don't know if I am an idiot or what......but I can't get a smooth start with this setup. Is there a break in period? I never get a good smooth engagement from a standing start. Slowly moving start, no problem. Once in gear and moving, no problem. Also the lag off the line is still there. Not sure why I didn't feel it 2 weeks ago.



Any thought? All I have ever driven in stick cars, so I don't think I am doing it wrong. Maybe I need to learn a new way to drive with this setup.



Also, the rattling is a little more annoying than I previously mentioned. Not a huge deal, but when I was doing some spirited driving up at Mt. Diablo this weekend I did notice it more than I would have liked. Not a deal breaker for me, but could be for someone else. If I start from a stop going a decent speed it will rattle until I hit 3k rpms.

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[flash]

are you sure the rattle is the clutch? even the stock disk doesn't rattle on the way up, and really only on the way down - the spring center one is a lot less



as for smooth take off, you need to take the rpms up a touch higher than you normally would before letting go of the pedal, but should only be 200 or so



i think you have something else going on

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[UKCS]

Concur with Flash, use a couple hundred more rpm, plus after a few more weeks you will (hopefully) have readjusted to the more sensitive moderation/balance between clutch and revs. Thinking about it i had similar issues, but fairly readusted/used to it now (except when i don't use the car for a whilst then get caught out occasionally)

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[Mark]

[quote name='flash' post='55464' date='Jun 27 2008, 07:11 AM']even the stock disk doesn't rattle on the way up, and really only on the way down



as for smooth take off, you need to take the rpms up a touch higher than you normally would before letting go of the pedal, but should only be 200 or so[/quote]



+1



When I switched to the RSBarn flywheel I also switched to a softer pressure plate. My clutch went from a hard feel with engagement 1" from the floor to a soft feel with engagement a couple of inches form the top. I told Pete I would stall at the first stop light, I was wrong it was the second. <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" /> I don't even notice it now and I definitely do not have a rattle or buzz on the way up the revs and rarely on the way down.

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[mrmister]

I will have to bring the car to the next Bay Area meet up and have someone else drive it. Maybe Arash will be kind enough to stop by and take her for a spin. I think he is living just across the park from me right now.



My rear shocks are totally shot and that doesn't help starting when the rear end is bouncing around. I also think it might help if I get the RSBarn chip and do the airbox mod. Maybe get the exaust system too. That would hopefully help get rid of that dead spot in the low RPMS while starting out. See that, I just turned shocks, struts, springs, M030 bars, exaust, chip, and airbox mod in to a 'repair' instead of an upgrade. Well, the shocks are a repair either way I suppose.



I get the rattle only when I let the revs drop below 3000 while in gear. Sometimes this happens while taking a low speed corner in the city. I could just pop in the clutch, but I don't always do that. Definitely can get a rattle up to 3k while taking off in first gear. Only in first gear starting from a stop and hitting the gas about 60%. I think this might be when I don't give it nearly enough gas though. I will get the hang of it I suppose.

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[94SilverCab]

[quote name='mrmister' post='55524' date='Jun 28 2008, 01:42 AM']My rear shocks are totally shot and that doesn't help starting when the rear end is bouncing around. I also think it might help if I get the RSBarn chip and do the airbox mod. Maybe get the exaust system too. That would hopefully help get rid of that dead spot in the low RPMS while starting out. See that, I just turned shocks, struts, springs, M030 bars, exaust, chip, and airbox mod in to a 'repair' instead of an upgrade. Well, the shocks are a repair either way I suppose.[/quote]



This is what I explain to my wife is "Standard Maintenance..."



<img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" />

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[flash]

i think the rattle might be something else, and possibly not clutch related - the clutch rattle is a very specific sound, and we have never known it to be above about 2400 rpm, and certainly not on acceleration of that level - i'm guessing that something was left not quite right on installation - i have been chasing a rattle for a long time - it is not the clutch, but showed up the last time i did a disk - obviously i left something in a place that it isn't happy - i'll find it this week when i swap out my disk again



sure wish i could have heard it while i was in paso

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[mattipuh]

I notice very little noise or vibration from my RSBarn flywheel and I'm not particularly concerned.



I got mine installed in June, and the rattle is to me bit strange.

- if I get cold start, there's hardly any rattle (this is normal)

- when tranny warms up, the rattle gets worse. It's biggest when decelerating from 2500rpm to 2000rpm.

- my rattle does not come from clutch or flywheel, but from tranny.



one thing that causes me wonder is that when the car is warm, sometimes it rattles REALLY lot, sometimes very little. this makes me think that there must be something "loose", which would make the clearance (from where ever the rattle comes from) vary. it might be the engine or tranny mounts which are in bad condition -> cause more play in powerdrain -> rattle varies... but havent' tested this yet.



do you guys have similar efffect, that rattling varies depending on day, even when driving with warm engine + tranny?

I would surely like to hear possible fixes for this problem. Little rattle is ok for me, but sometimes it's too loud to be driven in the city. Wouldn't like to get any parts broken from tranny, but at the moment I'm not sure wheter the tranny + LWFW -combo works as it should.



Performance-vice, really great improvement, car accelerates and revs up now really beautifully! If I would get out of the rattle, it would be so cool mod!

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[Mark]

The only time I get a rattle is on hard decel around 2300-2100 RPMs. I rarely am in a hard decel with the clutch engaged at that RPM



Odd can't edit my post, but I will add I have a pretty loud exhaust and tires that are noisy but I would still think I would hear the rattle/buzz if it was occurring any other time.

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[Big Dave]

Matti.



"- if I get cold start, there's hardly any rattle (this is normal)

- when tranny warms up, the rattle gets worse. It's biggest when decelerating from 2500rpm to 2000rpm.

- my rattle does not come from clutch or flywheel, but from tranny. "



Thats exactly what happens when you fit a lightweight flywheel and a standard clutch disc..

Ive just done the same + get exactly the same result / noise...

It can be a bit unnerving at first, but youve just got to live with it...

The price of mods + performance....

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