@!&_)*(^% clutch again!!!!!
03-25-2008, 07:41 PM
#61
Hey Kevin,
I'm following your post closely , I did the same GTS setup last year. Mine seems to be holding, but there's times when I'm starting to question it.... (about 1k miles so far). Let me know if you decide to take Carl's offer up on rebuilding your pressure plate, I didn't even know that was an option.
As far as rear tires go, just fit the widest ones you can. Even with 335's, I'll get tire spin in 3rd gear.
Good luck.
I'm following your post closely , I did the same GTS setup last year. Mine seems to be holding, but there's times when I'm starting to question it.... (about 1k miles so far). Let me know if you decide to take Carl's offer up on rebuilding your pressure plate, I didn't even know that was an option.
As far as rear tires go, just fit the widest ones you can. Even with 335's, I'll get tire spin in 3rd gear.
Good luck.
03-25-2008, 07:48 PM
#62
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03-25-2008, 08:19 PM
#63
Nordschleife Master
Then he states there is too much power for the manual as he can "wag" the a$$ in 3rd gear, asking if the autos will be able to put the power down abit better, or be abit more controlable.
I could be completely off on that, but that is how I read it.
03-25-2008, 10:30 PM
#64
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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?
before i went to murph stage 3 my '89 auto put down virtually the same as your car and it was very controlled. first gear was pretty useless, but 2nd gear up handled the power very well with 295 rears. a bit different now but still not too bad...
i'm very curious as well on the clutch options as my other cars all have potential issues.
03-25-2008, 11:14 PM
#65
Developer
Carl,
I know SPEC lists an option for an aluminum pressure plate on their site under the 928 page i found but then when i looked closer it says the aluminum version is only for other makes and model cars. Also they claim to be able to pull 25% of the weight out of the PP for an additional $70 or so. Do you have any experience with that?
I know SPEC lists an option for an aluminum pressure plate on their site under the 928 page i found but then when i looked closer it says the aluminum version is only for other makes and model cars. Also they claim to be able to pull 25% of the weight out of the PP for an additional $70 or so. Do you have any experience with that?
However, ours does exist, and we have three years on it and many satisfied customers. You can press on your own timing ring, or for $100, I buy the timing rings from Mark Anderson and mount them to your aluminum flywheel for you. I have both 60 tooth and 100 tooth timing rings in stock.
Sorry - I only have aluminum flywheels for twin-disk setups at this time.
Check it out: http://www.928motorsports.com/parts/...umflywheel.php
03-25-2008, 11:16 PM
#66
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i'm very curious as well on the clutch options as my other cars all have potential issues.
Cluthes in 3 different strengths, for every year and model of 928.
Thats about as well rounded as I can get.
03-25-2008, 11:29 PM
#67
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No offense to Carl, but you can order directly from Spec and get a wide range of offerings for a lot less $$$.
Tom-
I'll have to have you drive my GT at SITM so you can get a sense of the Stage 3+.
Tom-
I'll have to have you drive my GT at SITM so you can get a sense of the Stage 3+.
03-25-2008, 11:57 PM
#68
Nordschleife Master
Yes, I have seen that. That marks the second time I have seen alluminum flywheels advertised for the 928 that in fact, do not exist.
However, ours does exist, and we have three years on it and many satisfied customers. You can press on your own timing ring, or for $100, I buy the timing rings from Mark Anderson and mount them to your aluminum flywheel for you. I have both 60 tooth and 100 tooth timing rings in stock.
Sorry - I only have aluminum flywheels for twin-disk setups at this time.
Check it out: http://www.928motorsports.com/parts/...umflywheel.php
However, ours does exist, and we have three years on it and many satisfied customers. You can press on your own timing ring, or for $100, I buy the timing rings from Mark Anderson and mount them to your aluminum flywheel for you. I have both 60 tooth and 100 tooth timing rings in stock.
Sorry - I only have aluminum flywheels for twin-disk setups at this time.
Check it out: http://www.928motorsports.com/parts/...umflywheel.php
Carl,
Actually I was referring to the Aluminum version of the Pressure plate not the flywheel. The 911's use a Sachs Aluminum PP but ive yet to find one for the 928. The single disc PP weights 40lbs. Part of that is the starter ring but thats got to be one of the heaviest PP's around.
SPEC says they can take out 25% of the weight in the Pressure plate as well, not the flywheel. Spec doesn't list a flywheel for the 928 I know that, but i am looking to lighten the PP, I may want a 5lb flywheel to replace the stock 10.5 lb unit, but the PP is the biggest offender here for rotating mass as far as i am concerned. Its been widely suggested to go to the twin disc setup and i still really like that idea, but the conversion is somewhat costly mainly because of mid plate prices. I wonder if any OEM's make this. From Porsche its expensive, but they must have been made by someone else, Sach's or whoever, can they be sourced from the manufacturer, I dont think so at this point, so the twin disc is for now out of my budget.
03-26-2008, 12:05 AM
#69
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i have a number of different clutches that i am trying on the track cars. kevlar twin disc, carbon steel twin disc, clutchmasters, considering a tilton triple disc.
so far for the street i have been ok with the gts clutch in the twin screw. looks like i will probably need to change that though. we'll see about the gts stroker once i get it sorted...
03-26-2008, 06:59 PM
#70
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My machinist also has told me that when a flywheel has blue spots or cracks in it it will get "Grains" of hard and soft spots like the grain in wood and will wear unevenly.
They will stay there after it has been turned, which in a very short time will lead to high and low spots on the flywheel.
But once again, I have 0 prof of this.
They will stay there after it has been turned, which in a very short time will lead to high and low spots on the flywheel.
But once again, I have 0 prof of this.
The metallurgy sounds plausible, based on my sketchy knowledge.
So, a heat-treat for trashed flywheel should be able to restore it. Should work and be less $$$ than a new Porsche part.
03-26-2008, 09:00 PM
#72
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03-26-2008, 09:20 PM
#74
Rest in Peace
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When they have turned black and blue, they are going to have cracks.
That is what I was trying to say.
