Diff Whine and Fluid Loss
#16
09-01-2016 | 11:29 AM
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If you run your car on a road course with any type of conviction and looking to maximize lap times, then skip a TBD and install a proper clutch type LSD so that you can have the LSD shimmed with a preload of your specification. You can also easily flip your ramps for further tuning flexibility. On a 996, 40/60 works well along with a relatively high preload. I just had my LSD reshimmed to a 80 lb preload and set my personal best with it. OEM street LSDs like those on 6/7gt2/3 are shimmed to a measly 7 lbs or so most likely for liability reasons.
Guard makes superior LSDs which you will find on a vast majority of raced or seriously tracked Porsche out there. Go to your local track or a Club race and see what guys are running. You'll find either Guard or a Cup LSD in the fastest cars, nothing else. There is a reason for that...
Guard makes superior LSDs which you will find on a vast majority of raced or seriously tracked Porsche out there. Go to your local track or a Club race and see what guys are running. You'll find either Guard or a Cup LSD in the fastest cars, nothing else. There is a reason for that...
#17
09-01-2016 | 12:21 PM
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Manufacturer literature and mounds of white paper is all fine and dandy but go see what the is used at the track by the fast guys and all the race teams. That's the real test. That's all I'm saying. Wave track is a fine product for its intended use with many happy users (I'm not knocking it in any way) but you will NOT find it on any formidable road course / race cars. Sounds like OP is looking for a product to fit that bill hense my recommendation for a more suitable product for his intended application.
On the other hand I would not necessarily recommend a Guard/Cup unit to a guy with mostly street / canyon use or the occasional run down the 1/4mile strip. Nor would I try to educate a guy in what is required for a straight line car as I've never even seen a drag strip and know nothing about it.
On the other hand I would not necessarily recommend a Guard/Cup unit to a guy with mostly street / canyon use or the occasional run down the 1/4mile strip. Nor would I try to educate a guy in what is required for a straight line car as I've never even seen a drag strip and know nothing about it.
#18
09-01-2016 | 12:34 PM
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With that said, give Matt Monson at Guard a call and he will get you taken care of. He's in my backyard, amazing product and support. I believe Guard only sells to the approved shops that will install the unit for you as he does not want just any monkey to slap it in. Matt can tell you who the authorized shop is in your area.
Last edited by pwdrhound; 09-01-2016 at 01:04 PM.
#19
09-01-2016 | 12:36 PM
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I will have a freshly rebuilt Guard billet 40/60 LSD up for grabs at the end of the month but I believe it's already spoken for (if I can remember who wanted it. Lol). Maybe if they read this they can PM me and refresh my memory.
With that said, give Matt Monson at Guard a call and he will get you taken care of. He's in my backyard, amazing product and support. Guard only sells to the approved shops that will install the unit for you as he does not want just any monkey to slap it in. Matt can tell you who the authorized shop is in your area.
With that said, give Matt Monson at Guard a call and he will get you taken care of. He's in my backyard, amazing product and support. Guard only sells to the approved shops that will install the unit for you as he does not want just any monkey to slap it in. Matt can tell you who the authorized shop is in your area.
#20
09-01-2016 | 01:03 PM
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Depending on how hard you track your car and your end hp, you may also consider Guard's trick billet side cover. Used on crazy 1500hp cars like Kong or cars with heavy track use in mind. Unlike other billet side covers like CMS, this cover is made to accept a much larger bearing that the standard OEM version. The center section of the cover is also threaded (with a locking feature) so that you can externally adjust your clearances. The best feature in my opinion is the oversize bearing. That's why we got it.
FRONT:
[url=https://flic.kr/p/LE31pV]
BACK:
[url=https://flic.kr/p/KPUfQL]
Last edited by pwdrhound; 09-01-2016 at 01:19 PM.
#21
09-01-2016 | 01:55 PM
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Great info - all new to me my shop knows this better than I do but I bring him all these recommendations and we go from there. I am about 590 to the wheels in my car so not pushing the crazy HP some other are.
#22
09-01-2016 | 03:50 PM
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i have no doubt even absent personal experience with one that a 40/60 guard would be the preference of anyone that exclusively tracks their car and pwdrhound has always wisely extolled the virtue of a plate type over a tbd for reasons made clear..
but then neither do i doubt that the wavetrac is more than sufficient for anyone with this car that's attempting to eliminate our classic open diff/no load frustration and accompanying wheelspin that these cars readily provide. particularly when one finds oneself regularly in "one wheel drive"
and while white mkt'g papers are indeed, just that.. i am still a believer, and it ain't gonna ever wear out, neither! lol
but then neither do i doubt that the wavetrac is more than sufficient for anyone with this car that's attempting to eliminate our classic open diff/no load frustration and accompanying wheelspin that these cars readily provide. particularly when one finds oneself regularly in "one wheel drive"
and while white mkt'g papers are indeed, just that.. i am still a believer, and it ain't gonna ever wear out, neither! lol
#23
09-01-2016 | 07:58 PM
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Manufacturer literature and mounds of white paper is all fine and dandy but go see what the is used at the track by the fast guys and all the race teams. That's the real test. That's all I'm saying. Wave track is a fine product for its intended use with many happy users (I'm not knocking it in any way) but you will NOT find it on any formidable road course / race cars. Sounds like OP is looking for a product to fit that bill hense my recommendation for a more suitable product for his intended application.
#24
09-01-2016 | 08:17 PM
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I glanced at the wavetrac website and their technical info and I think the biggest difference from an operation standpoint between the wavetrac and a true LSD appears to be them fact that unlike the wavetrac (which is torque biasing) an LSD has the ability to fully lock both axles. Unless I overlooked it, this important ability to lock is not mentioned by wavetrac. If the wavetrac truly can not lock, then that would explain why a clutch type LSD is the faster set up on a road course Porsche.
Last edited by pwdrhound; 09-01-2016 at 09:24 PM.
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