09-02-2008, 10:31 AM
|
#1
|
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
Quote:
|
The biting point is quite high,
|
This is the sign that ALL push clutches exhibit when the disc is getting thin. Same for 964's/993's/986's/ everything.. Your mechanic is correct. The disc is worn.
Someone above was trying to tell you to shift at peek torque for each gear. You *should* be able to do this by feel.
Double clutch up or blip down? Not on the street. Complete wast of gas blipping down on the street. Even my pro drivers only blip into the actual gear they need to conserve GAS.
You can lift throttle upshift these tranny's at peak torque. They are NOTHING like the early 901/915/930 boxes of yesteryear. These have Borg-Warner synchro's in them just like the Vettes and Vipers do. I don't recommend it driving it this way for very long, but if the clutch fails on you.. you certainly can to get it wherever you need to. Clutch fails: put it in first gear with the engine off and start the car with it in gear. It will shutter, but it will start and take off in first, then bring the engine up to peek torque, lift throttle, and pull the shifter back into second. Come to a light? lift throttle and take the car out of gear, shut it off, coast.. come to stop put it in 1st, hit the starter again when the light goes green.
Long before you do that  Get AAA Your starter will thank you for it. The above technique should be used when out in the middle of nowhere. I have driven a Boxster from San Jose to LA with no clutch. I only stopped once to use the mens room
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
09-02-2008, 10:59 AM
|
#2
|
|
Porscheectomy
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
|
Quote:
|
Originally Posted by Brad Roberts
This is the sign that ALL push clutches exhibit when the disc is getting thin. Same for 964's/993's/986's/ everything.. Your mechanic is correct. The disc is worn.
B
|
Even if the biting point is high, if it's still gripping, the clutch is still working. If you wait until it slips, you have used it to the end of it's life. Why replace it before that?
|
|
|
09-03-2008, 11:29 AM
|
#3
|
|
Registered User
Join Date: Jun 2007
Location: Colchester, CT
Posts: 489
|
This got me thinking that I should get mine done sooner rather than later. My car is about to hit 70k and the clutch still seems okay, but you never really know. Well, here goes another big expense but rather do this than blow the clutch at an AX event.
Chris
__________________
1999 986 2.5L, Stock Exhaust (S muffler), EVO Intake, 18" Stock rims (17" during winter), IMS Upgrade, 150k+ miles and counting!
87 944S brought back to life
|
|
|
09-03-2008, 11:37 AM
|
#4
|
|
Porscheectomy
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
|
Quote:
|
Originally Posted by Dragonwind
This got me thinking that I should get mine done sooner rather than later. My car is about to hit 70k and the clutch still seems okay, but you never really know. Well, here goes another big expense but rather do this than blow the clutch at an AX event.
Chris
|
Why? There's nothing disastrous that can happen.
|
|
|
09-03-2008, 06:29 PM
|
#5
|
|
Registered User
Join Date: Jun 2007
Location: Colchester, CT
Posts: 489
|
Well let me ask you all this then. When you say 'bite' on the clutch, is it where you first feel the beginning of the resistance of the clutch or when you feel full connection? Assuming it is the former that you are talking about then mine is still low. However, at 70k my mechanic, who is quite good, was surprised it was lasting this long.
Chris
__________________
1999 986 2.5L, Stock Exhaust (S muffler), EVO Intake, 18" Stock rims (17" during winter), IMS Upgrade, 150k+ miles and counting!
87 944S brought back to life
|
|
|
09-03-2008, 06:46 PM
|
#6
|
|
Registered User
Join Date: Aug 2008
Location: Arizona
Posts: 402
|
Quote:
|
Originally Posted by Dragonwind
Well let me ask you all this then. When you say 'bite' on the clutch, is it where you first feel the beginning of the resistance of the clutch or when you feel full connection? Assuming it is the former that you are talking about then mine is still low. However, at 70k my mechanic, who is quite good, was surprised it was lasting this long.
Chris
|
The first resistance, its somewhere between halfway to 3/4 of the way up on the clutch (meaning you have to raise it half to 3/4 of the entire length to get the clutch to start resisting).
I've decided to use the last of it until I feel it's almost completely gone, then I'll get a 90k service done on it as well as some other repairs.
|
|
|
09-04-2008, 11:33 AM
|
#7
|
|
Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
|
Be prepared
The current pricing on the stock flywheel is $977. If your flywheel is still good, then they will reuse it and the parts pricing for disc/pp/t-out will be around $500. Asco alum flywheels are in the $800 range. For some reason, we are seeing more and more dual mass failures
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is On
|
|
|
All times are GMT -8. The time now is 01:28 AM.
| |