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bsairhead
Samba Member
Joined: October 08, 2008
Posts: 3623
Location: viroqua wi.
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 Posted: Sat Apr 27, 2024 11:55 am Post subject: Re: Death wobble |
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| So 30 psi will cause it but 18 will not? |
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Cusser
Samba Member
Joined: October 02, 2006
Posts: 31424
Location: Hot Arizona
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Starbucket
Samba Member
Joined: April 30, 2007
Posts: 4033
Location: WA
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| Posted: Sat Apr 27, 2024 1:40 pm Post subject: Re: Death wobble |
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The 18 PSI was designed for Bias ply tires because the VW front end is so light that the tires would run on the center proton of the tread reducing the contact patch and making the steering squirrely and reducing braking efficiency now radial tires have a steel belt to keep the tread patch on the hwy. but the 18 PSI still gives the steering a firmer feel. The greater grip on the road amplifies any worn or loose parts and you get the wobble at 45-50 for some reason that's the magic number. I would just drive at 43 or 55 and hang on and blast through the wobble zone, worked for years because I hate front end work  . |
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dennismcd707 
Samba Member
Joined: October 09, 2017
Posts: 521
Location: Burbs of Detroit
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| Posted: Sun Apr 28, 2024 8:05 am Post subject: Re: Death wobble |
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I gotta ask. The shop that fixed my Super wobble at 50mph said they replaced my track arm bushings, but I never hear that term here on the Samba. Are track arm bushings the same as control arm bushings? And are there inner and outer control arm bushings? I'd love to see a detailed sketch of the bushings used in the front end.
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1971 Super Beetle, 1776, dual Weber's, roller crank, big valve modified racing heads, close ratio trans, lowered suspension, 4 wheel disc brakes, car has over 368,000 actual miles. (RIP 1970 Beetle/Baja, 1986 GTI, 1999 Jetta, 2002 Jetta) |
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passionre
Samba Member
Joined: November 28, 2021
Posts: 69
Location: Oklahoma
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| Posted: Sun Apr 28, 2024 8:21 am Post subject: Re: Death wobble |
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| dennismcd707 wrote: |
| I gotta ask. The shop that fixed my Super wobble at 50mph said they replaced my track arm bushings, but I never hear that term here on the Samba. Are track arm bushings the same as control arm bushings? And are there inner and outer control arm bushings? I'd love to see a detailed sketch of the bushings used in the front end. |
On the Supers they use a slightly different set-up. The radius rod and sway bar are built into one really....I assume that's what they meant by "track arm"
It's good practice to replace all front end bushings at once.....cured my horrible death wobble instantly. |
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talljordan
Samba Member
Joined: January 10, 2012
Posts: 982
Location: San Francisco, CA
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| Posted: Sun Apr 28, 2024 10:45 am Post subject: Re: Death wobble |
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"Track arm" and "Control arm" Are the same thing.
This is my old bushing, this is what caused my wobble. It is NOT possible to inspect these without disassembly.
See this image
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1972 Super Beetle, Parked until adequate restoration funding is acquired in restoration!
Wanted: Male computer diagnostic plug end |
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kpf
Samba Member
Joined: March 01, 2017
Posts: 864
Location: California, US
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| Posted: Mon Apr 29, 2024 12:48 pm Post subject: Re: Death wobble |
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Technically (for a '71), 18 psi is the radial tire spec:
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1971 Super Beetle |
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