Absolute Pace

Go Back   Club Cobra > Club Forums > Australian Cobra Club

Welcome to Club Cobra!  The World's largest non biased Shelby Cobra related site!

  •  » Representation from nearly all Cobra/Daytona/GT40 manufacturers
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and nearly 1 million posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

Keith Craft Racing
Nevada Classics
MMG Superformance
Main Menu
Nevada Classics
Nevada Classics
Keith Craft Racing
Advertise at CC
Banner Ad Rates
MMG Superformance
Keith Craft Racing
March 2024
S M T W T F S
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31            
  #1 (permalink)  
Old 08-25-2009, 04:09 AM
WKB's Avatar
WKB WKB is offline
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2004
Location: Ipswich, QLD
Cobra Make, Engine: Harrison Cobra, SC540 Roadster
Posts: 359
Not Ranked     
Default Spigot Bush or Spigot Bearing

I am about to remove the gearbox to replace the throwout bearing. While everthing is out I am going to replace the spigot bush.
The question is do I replace it with another bush or use a bearing?

Warren
Reply With Quote
  #2 (permalink)  
Old 08-25-2009, 07:40 AM
stephen low's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Aug 2001
Location: Melbourne, Australia, Vic
Cobra Make, Engine: G-Force Mk I, 5L Windsor, TKO 600, enhanced Jag / Koni suspension & LSD Diff.
Posts: 2,298
Not Ranked     
Default

In my day.......they were all bushes! Literally

But wouldn't it depend on your motor's specs?

I'd assume a precision bearing will always be better than a bush but it's whether one can be fitted.

Good luck!
__________________
slowy
Reply With Quote
  #3 (permalink)  
Old 08-25-2009, 02:10 PM
Merv and Sharon's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jun 2007
Location: Sunshine Coast Qld, QLD
Cobra Make, Engine: Harrison # 80; Ford 5.0L HO Trickflow heads, cam and rockers and MassFlow EFI
Posts: 3,482
Send a message via Skype™ to Merv and Sharon
Not Ranked     
Default

What motor Warren? I have the spigot bearing number if you need that.

Merv
__________________
Merv

Ford Cobra
Harrison #80.
Peregian Beach
Sunshine Coast Qld.
Reply With Quote
  #4 (permalink)  
Old 08-25-2009, 07:32 PM
WKB's Avatar
WKB WKB is offline
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2004
Location: Ipswich, QLD
Cobra Make, Engine: Harrison Cobra, SC540 Roadster
Posts: 359
Not Ranked     
Default

The motor is a 1UZ Toyota V8.
As this motor came out of cars only fitted with autos there was no spigot bush or bearing. Both the bearing and bush are available to be used when a manual conversion is carried out.
The bearing that is used is a 6201.

Warren
Reply With Quote
  #5 (permalink)  
Old 08-26-2009, 01:05 AM
Merv and Sharon's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jun 2007
Location: Sunshine Coast Qld, QLD
Cobra Make, Engine: Harrison # 80; Ford 5.0L HO Trickflow heads, cam and rockers and MassFlow EFI
Posts: 3,482
Send a message via Skype™ to Merv and Sharon
Not Ranked     
Default

OK! Then I certainly can't help!

Cheers,

Merv
__________________
Merv

Ford Cobra
Harrison #80.
Peregian Beach
Sunshine Coast Qld.
Reply With Quote
  #6 (permalink)  
Old 08-26-2009, 01:49 AM
CHANMADD's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2006
Location: San Marcos california, CA
Cobra Make, Engine: 1989 KCC from South Africa Right Hand Drive
Posts: 1,597
Not Ranked     
Default

There's no choice!.......... The bearing is the way to go!
Reply With Quote
  #7 (permalink)  
Old 08-26-2009, 02:22 AM
Krait's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2008
Location: Gold Coast, QLD
Cobra Make, Engine: Harrison #69, HSV LS2, T56, Custom rear suspension
Posts: 604
Not Ranked     
Default

Warren,

Bearings can get noisy real fast if conditions aren't right. We always used high quality bushes in rally cars. Maybe Scotty can advise.

BTW was it you talking to Roger Errington the other day?

Cheers
__________________
Geoff
Cobra Car Club of Qld - UAE Chapter

Last edited by Krait; 08-26-2009 at 02:23 AM.. Reason: add info
Reply With Quote
  #8 (permalink)  
Old 08-26-2009, 02:54 AM
AC-460's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2008
Cobra Make, Engine: BBF 545 Stroker Alloy Heads Roller Cam Aluminium Flywheel Twin plate Clutch TKO600 9inch Independent Rear 335x17 Rear 315x17 Front 1140kg
Posts: 292
Not Ranked     
Default

The biggest problem with a bearing is you cannot lock the centre of the bearing to the gearbox shaft. This can result in the shaft turning on the inside of the bearing and as the bearing is made of high carbon steel and the shaft of alot softer material you will wear the shaft on the nose. Stick with a Brass spigot it will cause you less problems
Reply With Quote
  #9 (permalink)  
Old 08-26-2009, 05:23 AM
WKB's Avatar
WKB WKB is offline
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2004
Location: Ipswich, QLD
Cobra Make, Engine: Harrison Cobra, SC540 Roadster
Posts: 359
Not Ranked     
Default

I have had a noise when the clutch pedal is pushed in. It sounds like a throwout bearing(the noise has been there pretty well from when the car was registered). The noise comes and goes, can be just audible to a horrible noise which sends a vibration through the gearbox, and goes away when in neutral and the clutch pedal is out. I am now thinking it could the spigot bush. But regardless what it is the gearbox needs to come out. To remove the gearbox the motor needs to removed from the car, so when it goes back in I want to 100% sure that the problem will not re-occur.
There is only one place I can get the spigot bush and I have one of these installed already.

That is my dilema, do I replace it with the same bush, or put a bearing in its place.


Quote:
Originally Posted by Krait View Post
Warren,

BTW was it you talking to Roger Errington the other day?

Cheers
Geoff,
If Roger is an electrical engineer who has worked with you before, that was me.


Warren
Reply With Quote
  #10 (permalink)  
Old 08-27-2009, 01:19 AM
Krait's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2008
Location: Gold Coast, QLD
Cobra Make, Engine: Harrison #69, HSV LS2, T56, Custom rear suspension
Posts: 604
Not Ranked     
Default

Warren,

Sound like the throwout bearing is shot. If you have the gearbox out change them both. Bushes don't usually make a noise but if they're worn they allow the gearbox input shaft to flog about. My money would be on installing a new bush for all the reasons above.

Roger would have been masquerading as an insurance assessor. Big Holden fan.

Cheers
__________________
Geoff
Cobra Car Club of Qld - UAE Chapter
Reply With Quote
  #11 (permalink)  
Old 08-27-2009, 02:03 AM
WKB's Avatar
WKB WKB is offline
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2004
Location: Ipswich, QLD
Cobra Make, Engine: Harrison Cobra, SC540 Roadster
Posts: 359
Not Ranked     
Default

Quote:
Originally Posted by Krait View Post
Warren,

Roger would have been masquerading as an insurance assessor. Big Holden fan.

Cheers
Geoff,
I was showing him the electrical areas of the power stations. As the assessor he was their electrical specialist. Didn't mention his Holden preferences.

I was going to change both when the gearbox was out. The part that annoys me the most is that the throwout bearing I bought was the "best quaility one available"(words from the bearing supplier). The one that came with the bellhousing etc had been in my cupboard for 6mths and I thought a new one was a good idea.


Warren
Reply With Quote
  #12 (permalink)  
Old 08-27-2009, 02:26 AM
Krait's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2008
Location: Gold Coast, QLD
Cobra Make, Engine: Harrison #69, HSV LS2, T56, Custom rear suspension
Posts: 604
Not Ranked     
Default

Warren,

If he knew me must be the same guy.

Yep, cars are fun aren't they

Cheers
__________________
Geoff
Cobra Car Club of Qld - UAE Chapter
Reply With Quote
  #13 (permalink)  
Old 08-27-2009, 06:55 AM
speed220mph's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Sep 2002
Location: Hickory, NC
Cobra Make, Engine: ERA 427SC w/427so, ERA GT #2002
Posts: 1,106
Not Ranked     
Default Dial it in

Quote:
Originally Posted by AC-460 View Post
The biggest problem with a bearing is you cannot lock the centre of the bearing to the gearbox shaft. This can result in the shaft turning on the inside of the bearing and as the bearing is made of high carbon steel and the shaft of alot softer material you will wear the shaft on the nose. Stick with a Brass spigot it will cause you less problems
Rather than covering up the problem with the bellhousing not being centered to the crankshaft, dial indicate the bellhousing. If should be whether you use a bushing or bearing . . . I recommend the bearing, but either will work fine. If the bellhousing is off center, use off-centered dowels to center the bellhousing. They can be rotated to shift the bellhousing in the direction needed. If the bellhousing is not too far off, say 0.010 inch, retain the bellhousing with two bolt snugly tightened, then whack with a dead-blow hammer in the direction needed and repeat the dial-indicating process.

Keep in mind that an offcentered trans-to-engine will "wrench" on the transmission input shaft and bearing, causing the shaft to wobble. A worst-case scenario would be a transmission that jumps out of 4th gear.
__________________
Tom

"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
Reply With Quote
  #14 (permalink)  
Old 08-27-2009, 07:47 AM
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Nov 2006
Location: Charleston, WV
Cobra Make, Engine: SPF 2592, Shelby alum. 527
Posts: 325
Not Ranked     
Default

Tom-

Maybe I'm wrong, but I read AC-460's statement to mean the transmission shaft is a slip fit into the pilot bearing with no way to lock the shaft to the bearing inner race. If the bearing starts to develop resistance, the shaft will start to spin in the inner race and it will either make a mess of the shaft tip, or worse case...."spin weld" the shaft to the inner race. You then end up prying the transmission from the bellhousing while trying to pull the pilot bearing out of the crankshaft. It's not too hard....the bearing is junk at this point and will pull apart...leaving the outer race still in the crankshaft. (Ask me how I know...but fortunately not on the Cobra!)

Although I'm using a pilot bearing with my TKO-600, I wonder if a bushing (like we used to run "back in the day") might be better?

BTW, your direction to dial-in the bellhousing is excellent advice. I preach the same sermon.

Rodger
Reply With Quote
  #15 (permalink)  
Old 08-27-2009, 10:12 AM
Chaplain's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Apr 2008
Location: Mechanicsburg, PA
Cobra Make, Engine: Everett-Morrison, 429CI
Posts: 98
Not Ranked     
Default

I encountered this same question while replacing my clutch recently. I was advised that unless you have dead nuts concentricity go with a bushing because if there is any eccentricity the result will be poor shift quality. I went with a bushing. Car shifts smoothly now. Having both a bearing and a bushing prior to the install, I wondered the same thing previously mentioned. That is the hardness of the bearing versus the pilot shaft, and the fact that there was clearance between the two and any slippage that might occurr what would be the resultant effect. My advice.....go with a bushing.
Reply With Quote
Reply


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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



All times are GMT -7. The time now is 05:43 PM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy