Redacted - Lexus IS Forum
User Tag List

 3Likes
  • 1 Post By IS_416
  • 1 Post By whatthe
  • 1 Post By whatthe
 
LinkBack Thread Tools
post #1 of 8 (permalink) Old 12-08-2015, 07:42 PM Thread Starter
Fiend
 
Join Date: Aug 2008
Posts: 381
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
           
Redacted

As per request

Last edited by CleanAsIS; 01-05-2016 at 03:40 PM.
CleanAsIS is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 12-08-2015, 08:20 PM
Frequenter
 
Join Date: Jan 2015
Posts: 179
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
 
Sorry but I would agree with them.. As a mechanic myself we never guarantee clutch work especially not after a year ... Driving habits are the only reason a clutch would go and after a year of it finally gave up.. If there was an initial problem or premature clutch wear or defect it would have been evident far earlier than the 1 year mark...
Poke_IS300 likes this.
IS_416 is offline  
post #3 of 8 (permalink) Old 12-08-2015, 11:29 PM
Enthusiast
 
Join Date: Dec 2002
Posts: 1,238
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 148 Post(s)
           
It's too early to point fingers until you get the clutch out and see the cause of failure. Maybe they didn't match the clutch disc to the flywheel (sprung vs. Unsprung), or it wasn't seating properly, or the disc became glazed the one time you used it hard, or your rear main seal started leaking fluid on the disc, or maybe it simply was the wrong choice for your driving style etc. Etc.

The only thing I dont like is stating that a 6 puck racing disc is only one meant to be shifted at redline as its dumb IMO. At bare minimum the clutch better be designed to be shifted at redline. Ive used heavy pressure plates on stock discs on other cars that were severly bagged and bounced off the rev limit for years with no issues.

Not sure what exact combo you went with, but some aftermarket clutches don't seem to hold up as well as stock. The lighter ACT plates used to be known to be pretty weak sauce.
Poke_IS300 likes this.
whatthe is offline  
 
post #4 of 8 (permalink) Old 12-10-2015, 01:14 PM Thread Starter
Fiend
 
Join Date: Aug 2008
Posts: 381
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
           
Redacted

Last edited by CleanAsIS; 01-05-2016 at 03:40 PM. Reason: as per request
CleanAsIS is offline  
post #5 of 8 (permalink) Old 12-10-2015, 01:37 PM
Enthusiast
 
Join Date: Dec 2002
Posts: 1,238
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 148 Post(s)
           
Too much heat into the friction material can melt some compounds and produce a shiny/crystallized surface on the clutch disc. It would result in less coefficient of friction after it's glazed.

Normally would be more a result of it being slipped. i.e. lend the car to a friend/wife/gf so they can learn to drive standard and they never quite let the clutch out or in, or launching at lights but rather than dropping the clutch, you let it out ever so slightly slower in order to keep revs up but not spin tires as much.
Poke_IS300 likes this.
whatthe is offline  
post #6 of 8 (permalink) Old 12-10-2015, 02:50 PM Thread Starter
Fiend
 
Join Date: Aug 2008
Posts: 381
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
           
Redacted

Last edited by CleanAsIS; 01-05-2016 at 03:40 PM. Reason: as per request
CleanAsIS is offline  
post #7 of 8 (permalink) Old 12-10-2015, 06:29 PM
Enthusiast
 
Join Date: Dec 2002
Posts: 1,238
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 148 Post(s)
           
Quote:
Originally Posted by CleanAsIS View Post
Hold on, when I launch it i'm not supposed to slip it????
I need a 'can't tell if serious' meme to put here

I don't mean launch like driving away normally from a light where you are trying to be nice to your passengers. I mean revving at 3000-4000 and trying to get out of the 'hole' as fast as possible by using your clutch to balance available traction. As far as your clutch is concerned, its not creating as much heat when it's directly coupled to the motor. If you pop it, you might hook and bog until revs come up, or tires might just break loose. It's less heat for your clutch but usually slower and still harder on your driveline (assuming its ok unless you shatter the clutch disc material from too high rpm).

Normally fastest launch would be a tiny bit of slip that keeps revs on engine up, and prevents shock to drivetrain and tires from breaking loose. It's better for your drivetrain, but bad for the life of the clutch. It's a trade-off and you have to pick your poison.

I've shattered (was worse with nitrous car as NOS comes on like a sledge hammer), glazed, exceeded torque capacity, or just simply worn out a number of clutches in my time. It's usually power related for me, as I don't have issues driving for years on near stock cars... except my talon... I replaced a new 'performance' clutch that lasted maybe 5000miles and it only had two-three lame runs at the track.

As a side, the clutch damper acts kind of as a delay on clutch release. If you like more aggressive driving, I think it makes it harder to modulate and even make the situation worse. A CDD would be a good investment on your next clutch.
whatthe is offline  
post #8 of 8 (permalink) Old 12-11-2015, 01:30 AM Thread Starter
Fiend
 
Join Date: Aug 2008
Posts: 381
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
           
Redacted

Last edited by CleanAsIS; 01-05-2016 at 03:41 PM. Reason: as per request
CleanAsIS is offline  
Sponsored Links
Advertisement
 
Reply

  Lexus IS Forum > Regional Forums / All Together Now > California

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Lexus IS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself. If your address is invalid, you will likely lose access to the site.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Current users viewing this Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome