Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

Kibort/ Sharktoberfest

Thread Tools
 
Search this Thread
 
Old 09-10-2009 | 03:47 PM
  #31  
mark kibort's Avatar
mark kibort
Rennlist Member
 
Joined: Feb 2003
Posts: 29,817
Likes: 185
From: saratoga, ca
Default

motor looks good with the motor mounts and "ears" . Bell housing halves, both look compromised, upper, really bad crack all the way around. flywheel and clutch are hitting.
Im now worried about the torque tube or maybe the short shaft. something doesnt seem right down there. Is it possible or done, to start the motor with the clutch off the car and just the flywheel?

Ive been told to put away the sawsal, cutting torch and plazma cutters for a bit.

mk



Originally Posted by James Bailey
Kibort it is quite easy to simply cut the roof off the wrecked car at lower windshield pillar and get it welded to the new tub , move the whole roll cage over BEFORE welding the roof on...... Roll cages are somewhat expensive ! In that way the "Holbert" car still exists ;at least parts of it ! You need to check the motor mount ears on the engine block they could easily be broken that would be a BIG problem they are brittle since it is part of the alusil upper block....
Old 09-10-2009 | 04:00 PM
  #32  
Mako 928's Avatar
Mako 928
Burning Brakes
 
Joined: Jul 2007
Posts: 1,075
Likes: 2
From: S.F. Bay Area
Default

Pretty amazing that the radiator is ok. It could be that with the bending/ twisting of the floor pans and the tunnel of kilter that the bearings in the torque tube are shot. Just a guess.
Old 09-10-2009 | 04:17 PM
  #33  
mark kibort's Avatar
mark kibort
Rennlist Member
 
Joined: Feb 2003
Posts: 29,817
Likes: 185
From: saratoga, ca
Default

Yeah, that was the most amazing part. radiator seems to be just fine. everything tore backwards around it and the wheel and side of the front clip, took all the force as well as the side frame rails.

im really wondering about the torque tube. anyway to check when it comes out?

Originally Posted by Mako 928
Pretty amazing that the radiator is ok. It could be that with the bending/ twisting of the floor pans and the tunnel of kilter that the bearings in the torque tube are shot. Just a guess.
Old 09-10-2009 | 04:23 PM
  #34  
Mako 928's Avatar
Mako 928
Burning Brakes
 
Joined: Jul 2007
Posts: 1,075
Likes: 2
From: S.F. Bay Area
Default

From doing clutch jobs I know that looking into the torque tube from the front you can see the front bearing. It should be I think about 9" from the front. WSM should have the specs.
Not to create more work but since the torque tube will be out it would be a good time to do the bearings. Especialy for a race car.
Old 09-10-2009 | 05:29 PM
  #35  
hacker-pschorr's Avatar
hacker-pschorr
Administrator
 
Joined: Aug 2001
Posts: 1,643
Likes: 2,259
From: Up Nort
Default

Originally Posted by mark kibort
Ive been told to put away the sawsal, cutting torch and plazma cutters for a bit.
Yes

If I were you I would start going corner to corner, writing down everything that need to be replaced for the new chassis. That way anyone who wants to help with parts donations can start getting together the pieces.
Old 09-10-2009 | 07:49 PM
  #36  
jon928se's Avatar
jon928se
Addict
Rennlist Member

 
Joined: Nov 2003
Posts: 2,608
Likes: 11
From: Sydney AUS
Default

Originally Posted by mark kibort
motor looks good with the motor mounts and "ears" . Bell housing halves, both look compromised, upper, really bad crack all the way around. flywheel and clutch are hitting.
Im now worried about the torque tube or maybe the short shaft. something doesnt seem right down there. Is it possible or done, to start the motor with the clutch off the car and just the flywheel?
mk
The bell housing upper has to be the weak link in the chain between the engine block and transmission, so a violent impact that tried to rotate or move the block relative to the trans would I guess crack the bellhousing before the TT bent. Once the bell housing is deformed/cracked there is then the possibility of bending the central shaft or the intermediate shaft. My guess is that if the misalignment of the block to the TT is not too severe the central shaft will be OK as they are quite elastic. You may want to examine the clamp and intermediate shaft and pilot bearing very carefully though.
Old 09-10-2009 | 08:14 PM
  #37  
90 S-4's Avatar
90 S-4
Pro
 
Joined: Mar 2004
Posts: 633
Likes: 1
From: OC. Calif
Default The Ultimate TBF

All that bent metal, torque tube etc, is pushing against the crank
which is pushing against the thrust bering. Every time the motor
is started to see if it is ok, it is only creating more damage to the TB
Old 09-10-2009 | 10:52 PM
  #38  
Mrmerlin's Avatar
Mrmerlin
Team Owner
 
Joined: May 2004
Posts: 28,724
Likes: 2,703
From: Philly PA
Default

its also quite possible that the sudden stop forced the trans forward and then thats what broke the bell housing since the radiator looks good and most of the damage is to the extremities of the car,
You will find out more once the car is placed on a lift, I would say the the engine mounts are stronger than the trans mounts
Old 09-10-2009 | 11:10 PM
  #39  
karl ruiter's Avatar
karl ruiter
Rennlist Member
 
Joined: Jan 2003
Posts: 3,378
Likes: 200
From: Honolulu and sometimes L.A.
Default

I would expect the front flange where the bell housing mounts to the torqu tube to be bent. I have seen this several times and have come to believe it happens pretty much any time the car is hit hard enough to move the motor. Sometimes it is hard to see. I did a unibody swap on my '82 and did not discover this problem until after I had broken the centers out of two sets of clutch disks. Then I dug, discovered the bent flange and went out and bought another tube, just to discover that it's flange was bent too. So I ground and filed it square and never had any further trouble.
Old 09-11-2009 | 08:52 PM
  #40  
mark kibort's Avatar
mark kibort
Rennlist Member
 
Joined: Feb 2003
Posts: 29,817
Likes: 185
From: saratoga, ca
Default

I just got off the phone with Mark Anderson and, again, I am amazed of the support that you all and he has been offering up here. I appreciate all of it, more than you all know. I certainly will be down there for the event with the holbert chassis, without futher molestation than has been done already. Im putting down the sawzall and stepping away from the plazma cutter.
Old 09-11-2009 | 10:44 PM
  #41  
BBX's Avatar
BBX
Rennlist Member
 
Joined: May 2009
Posts: 967
Likes: 0
From: San Diego, Ca
Default

So when is the party? I would like to come up! I also have a manual bell housing.
Old 09-12-2009 | 04:31 AM
  #42  
mark kibort's Avatar
mark kibort
Rennlist Member
 
Joined: Feb 2003
Posts: 29,817
Likes: 185
From: saratoga, ca
Default

top piece?? The bottom, might be ok, but its only a cover anyway and is the OB version to work with the OB starter mount method a long with clearance for the different clutch diameters.

I think we are doing something the friday before the event. maybe even thursday.

Looking forward to seeing everyone!

mk

Originally Posted by BB79
So when is the party? I would like to come up! I also have a manual bell housing.
Old 09-12-2009 | 06:24 PM
  #43  
GregBBRD's Avatar
GregBBRD
Former Vendor
 
Joined: Feb 2005
Posts: 15,230
Likes: 2,489
From: Anaheim
Default

Fast is good, but it seems like there's a whole bunch of steps being skipped.

Seems like you'd want to strip a chassis of all the undercoatingg, etc., install a cage, and then a roof, before transfering all the stuff.

Putting in the drivetrain seems like the last step.
Old 09-12-2009 | 09:27 PM
  #44  
Ninespub's Avatar
Ninespub
Three Wheelin'
 
Joined: Jan 2003
Posts: 1,384
Likes: 3
From: Saginaw, MI
Default

There's one in every crowd. Somebody wants to be logical and consider somewhat critical priorities over rash action that accomplishes alot. (just kidding Greg)

Paul barrera '91 $$$$4
Old 09-13-2009 | 03:04 AM
  #45  
mark kibort's Avatar
mark kibort
Rennlist Member
 
Joined: Feb 2003
Posts: 29,817
Likes: 185
From: saratoga, ca
Default

There are several ways to build a race car. Sure, I would love to take the chassis to a bunch of low paid laborers and strip off the undercoating to save those 10lbs. (when I did about 10% of the bottom of the car in the body shop WITH the right tools, the 1 ft tall pile of the stuff on the bottom was only a little over a pound!).

Anyway, it goes back to a clear set of goals. Nothing I have EVER built has ever surprised or let me down. I want another 1:37 Laguna car, any more, I cant aford to build and its much more than just the undercoating to be removed. It would be tough to build something slower if I tried. Mark and Joe run 1:31-2s now, and have 150 more HP. They also are running real slicks and have much wider stances, but Joeseph's is not to far off my car, but with the HP and the wider stance using slicks. Due to this sport not being my profession and very limited funds and resourses, Im going to do what I did before, which is put the drivetrain in a stock chassis and bolt on a street sport suspension. I will then gut it, cage it and paint it. after that Ill put on some my go fast tweeks and bolt ons, and thats about it. I dont think there is anything wrong with that, but certainly ,if I had the time and funds to do it, I would do what Mark did with his chassis, put bars going everwhere, dry sump the motor, hiem joint all the suspension points, start ordering slicks, instead of using free DOTs and then run with PCA boys!

Bottomline, the way Im doing it is a little old school, but thats why many on the list are helping, just to make sure I dont cut too many corners!

If those skipped steps are really bothering you, I'll pour beers for you at Sharktoberfest, while you man the air chizel and we remove some undercoating.



Originally Posted by GregBBRD
Fast is good, but it seems like there's a whole bunch of steps being skipped.

Seems like you'd want to strip a chassis of all the undercoatingg, etc., install a cage, and then a roof, before transfering all the stuff.

Putting in the drivetrain seems like the last step.



All times are GMT -3. The time now is 05:16 AM.