S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

Are our flywheels machineable for a new clutch?

Thread Tools
 
Search this Thread
 
Old 02-05-2004, 09:24 AM
  #21  
Elder Member
 
George @ BostonAudi's Avatar
 
Join Date: Mar 2000
Posts: 15,742
Likes: 0
Received 0 Likes on 0 Posts
Default If that was true, people wouldn't be spending these insanely overinflated prices...

on things like downpipes, and suspensions.
Old 02-05-2004, 10:09 AM
  #22  
AudiWorld Super User
 
VonK :: Retired's Avatar
 
Join Date: Nov 2000
Posts: 4,219
Likes: 0
Received 0 Likes on 0 Posts
Default To do this right, requires a vertical milling machine that rotates the flywheel --->

---> in a horizontal plane, while grinding from the vertical spindle under constant cooling spray. Very routine for any decent machine shop. No CNC required.
Old 02-05-2004, 10:22 AM
  #23  
New Member
 
MarkS4's Avatar
 
Join Date: May 2003
Posts: 248
Likes: 0
Received 0 Likes on 0 Posts
Default Your misunderstanding. $500 is a decent amount of money...

but if I told you that your failing and aged heart could be reconditioned for $185 (just the valves reworked) or a new one could be had for $699, which would you choose. I know it is a poor example on a totally different scale but you get my point.

The flywheel is dual mass. It has an internally sprung mechanism. You may be fixing only part of your problem. Sure the surface is nice and shiny, but how worn are the springs which can not be fixed?

Bottom line, make sure the flywheel is worth **SAVING**, because in the long run the money you save now could haunt you later.
Old 02-05-2004, 10:28 AM
  #24  
New Member
 
MarkS4's Avatar
 
Join Date: May 2003
Posts: 248
Likes: 0
Received 0 Likes on 0 Posts
Default A grinding cup on a VMC can do this job yes. Sounds like you would have it mounted on a manual....

turn table as well. Thats fine but in order to hold onto the fixed surface you would need to hold the flywheel most likely by the ring gear. This at best will be difficult to insure true-ness and parallelism to the crank mounting surface being it has been welded to the flywheel without much precision. Fixture up to set the flywheel on the crank mounting surface and now you have the disaster recipe that Jason was eluding to... to fast a feed or deep a grind and wala you have a flying frisbee.

But to each their own, I suppose you can skin a cat 1000 ways...
Old 02-05-2004, 11:01 AM
  #25  
AudiWorld Super User
 
VonK :: Retired's Avatar
 
Join Date: Nov 2000
Posts: 4,219
Likes: 0
Received 0 Likes on 0 Posts
Default Flying frisbbe implies high rotational speed, which implies machining, not grinding. --->

On a VMC, the FW would be clamped down concentrically, and rotated very slowly (motor driven) while applying about three shallow, constant vertical depth cuts. No feed rate problems.
Old 02-05-2004, 12:38 PM
  #26  
New Member
 
MarkS4's Avatar
 
Join Date: May 2003
Posts: 248
Likes: 0
Received 0 Likes on 0 Posts
Default

Von, Honestly stick to what you really know, Grinding at LOW speed? Is there such a thing?
Old 02-05-2004, 12:42 PM
  #27  
New Member
Thread Starter
 
Funkdariaa's Avatar
 
Join Date: Oct 2003
Posts: 368
Likes: 0
Received 0 Likes on 0 Posts
Default Keep thinking like that, I like it.

I feel that kind of attitude will keep your customers more than happy and they will continue to use you in a market such as this. Keep that up, you should be around for the long haul. : }

Sorry I didn't decide to use you this time around. I will be getting my old flywheel back and if I ever need to get it resurfaced you can be sure I'll be checking with your company.
Old 02-05-2004, 01:38 PM
  #28  
AudiWorld Super User
 
VonK :: Retired's Avatar
 
Join Date: Nov 2000
Posts: 4,219
Likes: 0
Received 0 Likes on 0 Posts
Default

The FW turns slowly, the cup grinding wheel turns at 20,000 RPM. Get it?
Old 02-05-2004, 02:51 PM
  #29  
AudiWorld Super User
 
Jason @ Streetwerke's Avatar
 
Join Date: Jan 2002
Posts: 5,190
Likes: 0
Received 0 Likes on 0 Posts
Default

=) Thank you. That made my day.
Old 02-05-2004, 04:14 PM
  #30  
New Member
 
MarkS4's Avatar
 
Join Date: May 2003
Posts: 248
Likes: 0
Received 0 Likes on 0 Posts
Default No, break it down for me I'm a little slow today, the cup diameter is what?

How exactly are you grinding a square corner? Multiple passes?

What you are saying can be done, but why? There are much better methods. Welcome to the eighties.

I'm done. Good night!


Quick Reply: Are our flywheels machineable for a new clutch?



All times are GMT -8. The time now is 07:55 PM.