@!&_)*(^% clutch again!!!!!
03-25-2008, 12:31 PM
#46
Developer
This is a little OT, but I have the old setup from mine that I replaced almost a year ago. Can any of this be refurbed? I'd like to have a spare clutch on the shelf and if I can re-use any of the existing parts I imagine it will save a bit of $$$.
As a favor to me, I think I can get Spec to rebuild Kevin's pressure plate because it is near-new. That will save him some money as we do not have to buy a new Sach pressure plate to start with. But as a rule, they do not want to work with or rebuild used clutches.
However, I am scratching my chin about this. Its about tiome int he life of these cars that we should find a service to rebuild the clutches we got.... some of these parts (like the twin disk intermediate plate) have gotten scarce enough and expensive enough that it would be worth it.
Sorta like upper a-arms.... we wait until they are no longer reasonable in the normal Porsche supply chain, then aftermarket manufacturers like us can look at making them. The engine wiring harness is another example.
Last edited by Carl Fausett; 03-26-2008 at 09:34 PM.
03-25-2008, 12:33 PM
#47
Rocket Pilot
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basically Kevin to convert to the twin disk setup you will need.
Dual disk flywheel (Carl's aluminum $500)
intermediate plate, used is fine but sometimes tricky to find.
automatic flywheel from an S4 or later.
I have a dual disk flywheel and intermediate plate that I would be willing to let go for $300, if you want to go that route Kevin you have first dibs on it.
That would limit the cost to a new clutch pack, and an auto flywheel (to steal the timing ring off of).
Not sure of the years needed for that timing ring to go right onto, but the flywheel I have may need to be put on a lathe and be turned abit to get it to mate right up. Someone who has done that will need to confirm.
and fwiw I picked up a brand new intermediate plate (about 7 months ago) off ebay for $25 + shipping. noone else bid on it. Not willing to sell it though :P
Dual disk flywheel (Carl's aluminum $500)
intermediate plate, used is fine but sometimes tricky to find.
automatic flywheel from an S4 or later.
I have a dual disk flywheel and intermediate plate that I would be willing to let go for $300, if you want to go that route Kevin you have first dibs on it.
That would limit the cost to a new clutch pack, and an auto flywheel (to steal the timing ring off of).
Not sure of the years needed for that timing ring to go right onto, but the flywheel I have may need to be put on a lathe and be turned abit to get it to mate right up. Someone who has done that will need to confirm.
and fwiw I picked up a brand new intermediate plate (about 7 months ago) off ebay for $25 + shipping. noone else bid on it. Not willing to sell it though :P
03-25-2008, 12:48 PM
#48
Race Car
The Murf kits put a tremendous amount of power to the ground-and I am seeking a final solution to this problem. BTW someone in this thread said they are sc'd and have never had a problem with their stock clutch. I say this, I bought the SC to do what SC'D 928's do
! If a stock clutch is holding on your car there is only two reasons.
A. You are not producing the power you think you are.
B. You are driving it like my grandmother.
NOTE: If B applies to you ,immediately remove the SC and in an expeditious manner, get it to someone who will USE it!!!!
Kevin
! If a stock clutch is holding on your car there is only two reasons.A. You are not producing the power you think you are.
B. You are driving it like my grandmother.
NOTE: If B applies to you ,immediately remove the SC and in an expeditious manner, get it to someone who will USE it!!!!
Kevin
Trust me, I don't drive like a grandmother. I don't dump the clutch at 3k though either. I'm not sure how much power I put down, I know that I'm running 8.5-9psi intercooled and sharktuned. I will get to a dyno as soon as I have time to get some numbers. And Btw, Bill was ~370rwhp at 5ish psi and no intercooler, so I expect to be well over 400 to the wheels.Dan
'91 928GT S/C
03-25-2008, 01:22 PM
#49
Nordschleife Master
afaik, there isnt a real difference in the intermediate plates as you can use an intermediate plate from all years with Carls aluminum flywheel.
If you are looking for faster revving the dual disk is for you, it revs way faster than the single disk clutch as the weight is kept more central.
If you are looking for faster revving the dual disk is for you, it revs way faster than the single disk clutch as the weight is kept more central.
03-25-2008, 05:01 PM
#50
Rocket Pilot
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Alright who has an auto 928 to trade for my 5-spd? Must be in as good of condition as mine cosmetically AND mechanically. Sans SC, of course. There is just too much power goin' to the asphalt for a manual. I just put on new R compounds and can still wag the *** at the top of 2nd and a bit of 3rd gear!Will the auto cars handle the power better?
03-25-2008, 05:16 PM
#51
Nordschleife Master
Alright who has an auto 928 to trade for my 5-spd? Must be in as good of condition as mine cosmetically AND mechanically. Sans SC, of course. There is just too much power goin' to the asphalt for a manual. I just put on new R compounds and can still wag the *** at the top of 2nd and a bit of 3rd gear!Will the auto cars handle the power better?
Thanks allot KEVIN!
03-25-2008, 05:26 PM
#53
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03-25-2008, 05:29 PM
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03-25-2008, 05:32 PM
#55
Drifting
We just did a ceramic 6 puck in a GT that is getting 10+ #'s of boost, alot more driver friendly than I thought it would be. Gripping power of a sintered metal with driveability of a kevlar...
Wider tires do put a lot more pressure on the clutch, the stock GTS clutch will probably hold up pretty well with stock tire sizes. 285/295 or heaven forbid, drag slicks will kill the stock GTS setup.
Wider tires do put a lot more pressure on the clutch, the stock GTS clutch will probably hold up pretty well with stock tire sizes. 285/295 or heaven forbid, drag slicks will kill the stock GTS setup.
03-25-2008, 05:38 PM
#56
Drifting
The planatary's recently wore out in the 89' 550rwhp car I built, two years of daily driver useage and no more than 80k miles. The customer did not like our prices for a upgraded unit and went to Aamco...he even got a 1 year warranty! I don't expect it to last very long at that horsepower level, just slightly longer than one year in fact!
03-25-2008, 05:40 PM
#57
Nordschleife Master
Z, his issues arent with the tranny. It is with grip :P
Kevin, 295s is pretty wide, but what traction, you said R compund?
I can break 275s free with my 310whp, so it doesnt suprise me that you can break 295s free.
You could either step upto a 305 (or larger) or just limit throttle input, that is the problem with high HP with light weight, traction is always an issue.
Kevin, 295s is pretty wide, but what traction, you said R compund?
I can break 275s free with my 310whp, so it doesnt suprise me that you can break 295s free.
You could either step upto a 305 (or larger) or just limit throttle input, that is the problem with high HP with light weight, traction is always an issue.
03-25-2008, 06:05 PM
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03-25-2008, 06:39 PM
#60
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Z, his issues arent with the tranny. It is with grip :P
Kevin, 295s is pretty wide, but what traction, you said R compund?
I can break 275s free with my 310whp, so it doesnt suprise me that you can break 295s free.
You could either step upto a 305 (or larger) or just limit throttle input, that is the problem with high HP with light weight, traction is always an issue.
Kevin, 295s is pretty wide, but what traction, you said R compund?
I can break 275s free with my 310whp, so it doesnt suprise me that you can break 295s free.
You could either step upto a 305 (or larger) or just limit throttle input, that is the problem with high HP with light weight, traction is always an issue.
*With Spec Stage 3+ clutch.