Josh Wimpey Josh Wimpey Ultra Moderator Location: VA Join Date: 12/27/2006 Age: Midlife Crisis Posts: 649 Rally Car: Sneak the Golf |
I think "threaded bobbins" is what is being referred to here as thimbles....
Not sure there is a correct term but thimbles bear no resemblance to the item being described. bobbins do (sorta-- if you cut off the flange on one end) Thimbles ![]() Bobbins ![]() ____________________________________________________________- One. Class -- 2WD www.quantumrallysport.com http://www.facebook.com/home.php?#/pages/Quantum-Rally-Sport/281129179600?ref=nf |
Morison Banned Senior Moderator Location: Calgary, AB Join Date: 03/27/2009 Age: Ancient Posts: 1,798 Rally Car: (ex)86 RX-7(built), (ex)2.5RS (bought) |
Or under torqued, allowing more play than expected to work on the captive nuts to break them loose. Years ago (08) when we got our open class car from Rocket, one of the things our crew learned in the first service was that EVERY bolt in the suspension was on the Torque checklist at EVERY service. First Rally: 2001 Driver (7), Co-Driver (44) Drivers (16) Clerk (10), Official (7), Volunteer (4) Cars Built (1), Engines Built (0) Cages Built (0) Last Updated, January 4, 2015 ![]()
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imnotcrazy Don Kennedy Godlike Moderator Location: Reading, PA Join Date: 10/05/2006 Age: Fossilized Posts: 227 Rally Car: Impreza |
Don't know what Zimmer recommends. I've never had a problem with one (of course this is my 3rd shell in 14 years). But the first shell lasted 7 years without a problem. May have something to do with the rust condition of the car in general! We tried removing a rear cross member from a rusty 95 shell and all of the captive nuts in the rear just spun. Wanted to use it in a 96 shell where the captive nuts were just fine. YMMV. Don Kennedy |
imnotcrazy Don Kennedy Godlike Moderator Location: Reading, PA Join Date: 10/05/2006 Age: Fossilized Posts: 227 Rally Car: Impreza |
I used to carry a full set of stock struts just for emergency purposes. Now that I have extra DMS struts, I only carry one front and one rear spare. As you said. if they bend I probably have a bigger problem that a full set of spares wouldn't help. In fact, the only time I destroyed 2 DMS units. nothing would have helped :'( Don Kennedy |
modernbeat Jason McDaniel Ultra Moderator Location: Dallas, TX Join Date: 12/14/2007 Age: Possibly Wise Posts: 401 Rally Car: 1963 SAAB Historic, 1995 Impreza Open Light totaled at WRC Mexico, 2005 STi Pikes Peak winner |
I have had two captive nuts rip out of shells before ever seeing a stage, and one after two events. All of them were on the trans cross member. I think Brianne has had a few come adrift in the rear. These are high mileage, unrusty, Texas shells. Usually the tiny little spot weld broke.
Jason McDaniel |
NoCoast Grant Hughes Infallible Moderator Location: Whitefish, MT Join Date: 01/11/2006 Age: Midlife Crisis Posts: 6,818 Rally Car: BMW |
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MConte05 Matthew Conte Mega Moderator Location: St. Louis, MO Join Date: 06/27/2011 Age: Settling Down Posts: 257 Rally Car: 1991 Subaru Legacy Turbozzzzzz |
I've had the captive nut break on me once before. On one side I just shoved cut washers in there to take up the slack. Held for quite a while. Then when the other side broke (trans cross member) I broke out the cutoff wheel and got to the backside through the floor and put in a bolt/nut/washer combo.
I found my new-to-me rally car also had the floor cut and bolts replaced on the trans cross member too. |
NoCoast Grant Hughes Infallible Moderator Location: Whitefish, MT Join Date: 01/11/2006 Age: Midlife Crisis Posts: 6,818 Rally Car: BMW |
Seems like the a burly inserts would be fine for the trans crossmember.
I have hundreds of them in M8 and M10 if anyone wants to try. Drill out the captive nut, weld this in... The rear crossmember is kinda important in tracking straight so I personally wouldn't want to mess with that without an alignment rack. Grant Hughes |
Doivi Clarkinen Banned Super Moderator Location: the end of the universe Join Date: 02/12/2006 Age: Ancient Posts: 1,432 Rally Car: 1980 Opel Ascona B |
Bobbins. It's a pain in the ass when you have to cut a hole in the floor to access the nut that has torn loose from it's teeny little spot welds. Why would this happen? Perhaps an oafish service crew member has cross threaded the bolt because shit is bent and holes don't line up anymore, that happens. Or perhaps the driver gives no fucks and smashes into things at full speed and demolishes suspension pieces that tear the captive nuts loose. That happens, too.
It's not just Subarus, I've had it happen on VWs, too. We sent Derek Bottles out of service with a wheel stud and nut bolting the rear of the lower control arm to the skidplate because the captive nut tore out of the chassis. We never thought we'd see him again but he finished with the left front wheel moving back and forth about a foot. To make the best use of bobbins you make them really long so you can weld them in from the bottom and the top if you can access a second panel where they poke through (think bottom and top of a box section.) That way they will resist moving and tearing out like a captive nut likes to do when things get whacked. |
john vanlandingham John Vanlandingham Elite Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
No. Grant. Listen to Dave... Both sides of a box. Same basic idea except the "body" part goes way the fuck UP and gets a little zappy pooo John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
alkun Albert Kun Senior Moderator Location: SF Ca. Join Date: 01/07/2008 Age: Possibly Wise Posts: 1,732 Rally Car: volvo 242 |
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john vanlandingham John Vanlandingham Elite Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Forgot the killer-zip-ties-of-death ex-Boeing surplus... Good enough to hold a head on a turbo motor making 2 bar boost. John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Doivi Clarkinen Banned Super Moderator Location: the end of the universe Join Date: 02/12/2006 Age: Ancient Posts: 1,432 Rally Car: 1980 Opel Ascona B |
All you need is a chunk of wood from the side of the road. ![]() |
Eric Ewert Eric Ewert Professional Moderator Location: Calgary, Ab Join Date: 05/13/2013 Age: Settling Down Posts: 366 Rally Car: volvo 240 |
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Morison Banned Senior Moderator Location: Calgary, AB Join Date: 03/27/2009 Age: Ancient Posts: 1,798 Rally Car: (ex)86 RX-7(built), (ex)2.5RS (bought) |
There are a couple of reasons to stay with the steel control arms.
- Class restrictions: Production GT, P4 etc. didn't allow for changing control arms. - The 'fuse' effect. Bending a control arm is better than breaking one, or bending the subframe the control arm is connected to. Many times I've completed events or stages with bent control arms that *might* have ended with a broken arm if it were aluminum. (That said, I had always heard the aluminum ones for the subaru break instead of bending, but we bent the shit out of one at Rocky last year. First Rally: 2001 Driver (7), Co-Driver (44) Drivers (16) Clerk (10), Official (7), Volunteer (4) Cars Built (1), Engines Built (0) Cages Built (0) Last Updated, January 4, 2015 ![]()
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