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What did you do to your 996TT today?

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Old 01-11-2024, 12:56 AM
  #14356  
powdrhound
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Originally Posted by docwyte
What are the differences between the 764 and 487 plates? Do they hold the same amount of torque?
The straps are identical on the 764 and 487 so in theory they should hold the same pressure. The 487 is essentially a 997GT3 4.0 pressure plate beefed up with heavier straps by Sachs Motorsport for greater holding power. Like the 4.0 GT3 plate, the 487 is a bolted pressure plate designed for greater rpms. The 764 is a riveted pressure plate more suspectible to bursting at high rpm. The 487 can NOT be used with a DMWF, only the OEM 964RS or Cup LWFW.

From a practical standpoint, the 487 seems to be smoother and a touch lighter feeling than the 764 plate. Don't know why, maybe it's stiffer / truer due to the bolted design. I have run the 487 with the OEM Cup LWFW and both the sprung 4.0 7GT3 disc and also the Cup 4 puck sintered disc. With the lightweight Cup 4 puck disc it's a killer track set up that you can beat on all day and can be shifted considerably faster than the sprung GT3 disc. The Cup disc is easier on the synchros. The 487 is a killer pressure plate for both street and track application and well worth the extra $400 to $500 over the 764.

Here is the 487PP / Cup LWFW / Cup disc track set up and the clutch in action.



Last edited by powdrhound; 01-11-2024 at 01:33 AM.
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Old 01-11-2024, 01:07 AM
  #14357  
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Originally Posted by Asmig
I've wondered what the difference is that the 487 is not compatible with dual mass flywheels, visually they look nearly identical.
The raised bolt heads on the 487 interfere with the thicker DMFW.
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Old 01-11-2024, 09:35 AM
  #14358  
docwyte
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So the 487 with the 964RS lwfw is probably a good combo for a car setup like mine?
Old 01-11-2024, 11:44 AM
  #14359  
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2 questions:

Is there any issue with leaving the engine running while refueling?

Any harm to leaving the A/C on when turning the engine off? Some vehicles need the evaporator core warmed back up to avoid musty smells.
Old 01-11-2024, 12:19 PM
  #14360  
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@993GT are you planning on engine out, or will you pull the gearbox separately? I had a hard enough time getting the gearbox spline lined up and back on with the engine out, not to mention getting the release fork shaft back in with the bearings, that I question how folks do a tranny only drop. Any wisdom to share?
Old 01-11-2024, 12:29 PM
  #14361  
993GT
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I always pull engine and trans as an assembly, worth the small amount of potential extra time to make sure it's done totally right/retain sanity lol

Originally Posted by mrdstr
@993GT are you planning on engine out, or will you pull the gearbox separately? I had a hard enough time getting the gearbox spline lined up and back on with the engine out, not to mention getting the release fork shaft back in with the bearings, that I question how folks do a tranny only drop. Any wisdom to share?
Old 01-11-2024, 12:59 PM
  #14362  
Capt. Obvious
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Originally Posted by QwikKotaTX
2 questions:

Is there any issue with leaving the engine running while refueling?

Any harm to leaving the A/C on when turning the engine off? Some vehicles need the evaporator core warmed back up to avoid musty smells.
Leaving the engine on while refueling won't hurt anything, but it could cause you to throw a code for a large evap leak. It won't put the car in limp mode or change how it drives, it will just need to be cleared.

I've never heard of there being any problem with leaving the AC turned on when you shut the down the car or fire it back up. The car has control over the compressor anyway, so if it was something to worry about the car would just override your on/off selection.
Old 01-11-2024, 01:24 PM
  #14363  
QwikKotaTX
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Originally Posted by Capt. Obvious
Leaving the engine on while refueling won't hurt anything, but it could cause you to throw a code for a large evap leak. It won't put the car in limp mode or change how it drives, it will just need to be cleared.

I've never heard of there being any problem with leaving the AC turned on when you shut the down the car or fire it back up. The car has control over the compressor anyway, so if it was something to worry about the car would just override your on/off selection.
Thank you. If I haven't gotten in to boost I just turn it the engine off when refueling.

For the A/C, one vehicle I had could be damaged if the core was left pressurized but it may have been internet BS. The core being wet from our humidity here is another matter but just turning off the compressor wouldn't fix that, it would need the fan running for quite some time to matter.
Old 01-11-2024, 01:38 PM
  #14364  
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Originally Posted by ernbu
Been exchanging emails. Hopefully this turns into something good.
So, can he do it?
Old 01-11-2024, 01:38 PM
  #14365  
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Originally Posted by 993GT
also a nice setup!
Cheers! If I can get organized this year, I'll get it all put together.
Old 01-11-2024, 08:00 PM
  #14366  
ernbu
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Originally Posted by 2fcknfst
So, can he do it?
He is looking into it. I’ll follow up on Monday if he doesn’t email me before.
Old 01-11-2024, 08:22 PM
  #14367  
powdrhound
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Originally Posted by docwyte
So the 487 with the 964RS lwfw is probably a good combo for a car setup like mine?
Yes. It works fine with the 964RS LWFW which is a slightly heavier version of the Cup LWFW.
Old 01-11-2024, 08:26 PM
  #14368  
powdrhound
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Originally Posted by mrdstr
@993GT are you planning on engine out, or will you pull the gearbox separately? I had a hard enough time getting the gearbox spline lined up and back on with the engine out, not to mention getting the release fork shaft back in with the bearings, that I question how folks do a tranny only drop. Any wisdom to share?
It's substantially faster to just drop the gearbox and leave the engine in. Helps if you have a boroscope to allow you a peek into the bell housing to make sure all is lined up. Doing it the first time, it's probably easier to drop the engine and gearbox as a whole but once you've done it a few times, leaving the engine in and just sliding the gearbox off is much quicker.
Old 01-11-2024, 08:52 PM
  #14369  
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Originally Posted by ernbu
He is looking into it. I’ll follow up on Monday if he doesn’t email me before.
Sounds... 'hopeful'.
Old 01-11-2024, 11:28 PM
  #14370  
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Originally Posted by powdrhound
It's substantially faster to just drop the gearbox and leave the engine in. Helps if you have a boroscope to allow you a peek into the bell housing to make sure all is lined up. Doing it the first time, it's probably easier to drop the engine and gearbox as a whole but once you've done it a few times, leaving the engine in and just sliding the gearbox off is much quicker.
Would this be applicable to us tip guys? Or since it’s just bigger and heavier it’s better to drop the whole package?


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