Thoughts on upgraded clutch/lwfw combo?
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I'm sure you've done your research but make sure you use a clutch assy that utilizes a sprung hub. You can run a solid hub unit but you'll get a lot of gear box backlash noise on acell/decel (not just chatter at idle) and potentially, over time, more excessive ring/pinion wear over a sprung hub or dual-mass set up.
I'm going to go with the Stage 2+ setup. Looks like it has the "sprung hub" so I should be good.
http://www.specclutch.com/products
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The LWFW will work fine on a 996 with an SC. However, a LWFW may also cause a blancing problem for the crankshaft, which is a risk on all engines that come with a DMF. Whether this risk materializes into damage to the engine has yet to be determined. Personally, if I am going to drive a car on the street that rattles, I might as well drive a 55 Chevy which is expected to have rattles. 
I ride a ducati with an open clutch cover. Rattling is just a part of my life so the 996 might as well rattle too
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Deputy Dog, I don't know if anybody warned you yet about needing a clutch pedal stop with the set up that you will be using. I found out after having my car towed back to the shop that did the installation for me. I replaced my clutch fork with the correct upgraded 997 part (from Sunset). After driving my car for about 10 miles, I discovered a horrible metal on metal sound, when I depressed the clutch fully. I could feel it through the clutch pedal. My friend that did the installation discovered that the pedal was throwing the clutch too far, causing the spring centered hub to come into contact with the splines on the pressure plate. The solution was to fabricate a cutch pedal stop. I discovered this is a common problem, due to the reduced clearance of the spring centered hub on the SPEC clutch.
If you want directions on how I made my pedal stop, please let me know. I sent a vendor here or on Rennlist an extra clutch pedal, so they could fabricate a pedal stop and market it....I never heard back from them.
If you want directions on how I made my pedal stop, please let me know. I sent a vendor here or on Rennlist an extra clutch pedal, so they could fabricate a pedal stop and market it....I never heard back from them.
Last edited by mfletch; Oct 19, 2009 at 10:33 AM.
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Deputy Dog, I don't know if anybody warned you yet about needing a clutch pedal stop with the set up that you will be using. I found out after having my car towed back to the shop that did the installation for me. I replaced my clutch fork with the correct upgraded 997 part (from Sunset). After driving my car for about 10 miles, I discovered a horrible metal on metal sound, when I depressed the clutch fully. I could feel it through the clutch pedal. My friend that did the installation discovered that the pedal was throwing the clutch too far, causing the spring centered hub to come into contact with the flywheel. The solution was to fabricate a cutch pedal stop. I discovered this is a common problem, due to the reduced clearance of the spring centered hub on the SPEC clutch.
If you want directions on how I made my pedal stop, please let me know. I sent a vendor here or on Rennlist an extra clutch pedal, so they could fabricate a pedal stop and market it....I never heard back from them.
If you want directions on how I made my pedal stop, please let me know. I sent a vendor here or on Rennlist an extra clutch pedal, so they could fabricate a pedal stop and market it....I never heard back from them.
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RSS now makes a nice clutch pedal stop for our cars...https://www.6speedonline.com/forums/...-stop-rss.html
SSI performance is the company that offered to fabricate one for me.
SSI performance is the company that offered to fabricate one for me.
Last edited by mfletch; Oct 19, 2009 at 10:32 AM.
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1999porsche 911, I misstated the problem I was having with my clutch...the spring centered hub was contacting the splines on the pressure plate, not the flywheel.
When I posted information about my LWFW problem over on Rennlist, "Mother" directed me to the following instruction on the JB Racing website..."(3) All Racing clutch kits require the installation of a clutch pedal stop to prevent clutch damage due to overtravel."
When I posted information about my LWFW problem over on Rennlist, "Mother" directed me to the following instruction on the JB Racing website..."(3) All Racing clutch kits require the installation of a clutch pedal stop to prevent clutch damage due to overtravel."
Last edited by mfletch; Oct 21, 2009 at 04:54 PM.
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1999porsche 911, I mistated the problem I was having with my clutch...the spring centered hub was contacting the splines on the pressure plate, not the flywheel.
When I posted information about my LWFW problem over on Rennlist, "Mother" directed me to the following instruction on the JB Racing website..."(3) All Racing clutch kits require the installation of a clutch pedal stop to prevent clutch damage due to overtravel."
When I posted information about my LWFW problem over on Rennlist, "Mother" directed me to the following instruction on the JB Racing website..."(3) All Racing clutch kits require the installation of a clutch pedal stop to prevent clutch damage due to overtravel."
There are any number of professional ways to control how far the pressure plate fingers are compressed and that should have been addressed and provided for by the seller.
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I have been looking into a LWFW but was also worried about the balancing issue, so was directed towards the 'Rattler' - http://www.tciauto.com/Products/Tech...ttler_tech.asp
May be worth looking into for anyone who is concerned, I believe they make them for a '6' instead of the V8.
May be worth looking into for anyone who is concerned, I believe they make them for a '6' instead of the V8.
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Tony
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Tony, here is a picture of the SPEC stage 2+ clutch. The spring centered hub protrudes in both directions. I did not do the installation. The mechanic that did, installed it correctly.
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IF it was installed correctly, you either got the wrong parts or their kits are not designed for your car. Are you sure they installed the correct lever? I would not accept it and would return to the installer and have them do it right.
Last edited by 1999Porsche911; Oct 21, 2009 at 05:07 PM.
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Mflech,
When I was installing mine I called the manufacturer and described my noise and it turned out to be what they sugested, an incorrect installation of the disc. I did this my self so I know what I had done. They also said
that for some reason just in the last year installers have been installing the steel plate with the bolt pattern in it in between the crank and the flywheel. Even when I did my install I could see that this was to keep bolts from galling the Aluminum and belonged on the front side. If you had someting like this it would run the plate up into the TO brg and cause the clutch to push in to the disc to far. I hope you get it fixed it works great and you really don't have to add anything else to the mix. I got 35,000 on mine
Tony
When I was installing mine I called the manufacturer and described my noise and it turned out to be what they sugested, an incorrect installation of the disc. I did this my self so I know what I had done. They also said
that for some reason just in the last year installers have been installing the steel plate with the bolt pattern in it in between the crank and the flywheel. Even when I did my install I could see that this was to keep bolts from galling the Aluminum and belonged on the front side. If you had someting like this it would run the plate up into the TO brg and cause the clutch to push in to the disc to far. I hope you get it fixed it works great and you really don't have to add anything else to the mix. I got 35,000 on mine
Tony
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I'll also be doing the Aasco lightweight flywheel and the stage 2 SPEC clutch on my 99 VF supercharged p-car shortly. Guess I'll have to chime back in here and let everybody know the installation progress.