vibration/shudder at 70 - possible alternatives (other than wheel balance?)

[dwitt1@satx.rr.com (dale witt)]

If ya stay on the road....don't worry about hitting any cactus, but you
might want to watch out for the jack rabbits that are the size of a small
deer!!!!!!

Dale Witt
2 rocs and a GTI

----- Original Message -----
From: "Julie Macfarlane" <juliemac57@hotmail.com>
To: <txrocco@sbcglobal.net>; <roccnroll@hotmail.com>;
<kcollins1@socal.rr.com>; <scirocco-l@scirocco.org>
Sent: Tuesday, April 22, 2003 2:04 PM
Subject: RE: vibration/shudder at 70 - possible alternatives (other than
wheel balance?)


> Jeeze if we are talking Texas, wacha gonna hit? Cactus?
>
>
>
> Julie Macfarlane
> Menlo Park Research & Development
> Internet Application Developer
> www.menloparkrandd.com
> www.montgomeryweb.org
> Amsterdam NY
>
>
>
>
>
> >From: "ATS - Patrick Bureau" <txrocco@sbcglobal.net>
> >To: "Julie Macfarlane"
>
><juliemac57@hotmail.com>,<roccnroll@hotmail.com>,<kcollins1@socal.rr.com>,<
scirocco-l@scirocco.org>
> >Subject: RE: vibration/shudder at 70 - possible alternatives (other than
> >wheel balance?)
> >Date: Tue, 22 Apr 2003 11:04:35 -0500
> >
> >The sign says 60, seems it mean Minimum in texas... most drive 80-95 at
all
> >time...
> >common down , show ya how to weave in 5 lane traffic at 90mph
> >
> >ATS - Patrick Bureau - txrocco@sbcglobal.net
> >
> >
> >=>-----Original Message-----
> >=>From: Julie Macfarlane [mailto:juliemac57@hotmail.com]
> >=>Sent: Tuesday, April 22, 2003 10:51 AM
> >=>To: txrocco@sbcglobal.net; roccnroll@hotmail.com;
> >=>kcollins1@socal.rr.com; scirocco-l@scirocco.org
> >=>Subject: RE: vibration/shudder at 70 - possible alternatives (other
than
> >=>wheel balance?)
> >=>
> >=>
> >=><message>
> >=>This is this the thought police.
> >=>You have exceded all of the road speeds for the United States.
> >=>Please surrender yourselves to the local speed shop.
> >=></message>
> >=>
> >=>
> >=>
> >=>Julie Macfarlane
> >=>Menlo Park Research & Development
> >=>Internet Application Developer
> >=>www.menloparkrandd.com
> >=>www.montgomeryweb.org
> >=>Amsterdam NY
> >=>
> >=>
> >=>
> >=>>From: "ATS - Patrick Bureau" <txrocco@sbcglobal.net>
> >=>>To: "Drew Teague"
> >=>><roccnroll@hotmail.com>,<kcollins1@socal.rr.com>,<scirocco-l@scir
> >=>occo.org>
> >=>>Subject: RE: vibration/shudder at 70 - possible alternatives (other
than
> >=>>wheel balance?)
> >=>>Date: Tue, 22 Apr 2003 09:21:33 -0500
> >=>>
> >=>>the prowler has 205-50-15 and it occured around 79-84MPH
> >=>>the daily driver has 185-60-14 it occured 76-80MPH
> >=>>
> >=>>humm... I think we are on something..
> >=>>
> >=>>ATS - Patrick Bureau - txrocco@sbcglobal.net
> >=>>
> >=>>
> >=>>=>-----Original Message-----
> >=>>=>From: scirocco-l-admin@scirocco.org
> >=>>=>[mailto:scirocco-l-admin@scirocco.org]On Behalf Of Drew Teague
> >=>>=>Sent: Tuesday, April 22, 2003 8:52 AM
> >=>>=>To: kcollins1@socal.rr.com; scirocco-l@scirocco.org
> >=>>=>Subject: Re: vibration/shudder at 70 - possible alternatives
> >=>(other than
> >=>>=>wheel balance?)
> >=>>=>
> >=>>=>
> >=>>=>>My Integra with the problem that turned out to be CV had its
problem
> >=>>=>>between about 37-43 mph - a fairly small, very specific speed
> >=>range and
> >=>>=>>never outside of it.
> >=>>=>>
> >=>>=>>--
> >=>>=>>Kevin Collins
> >=>>=>
> >=>>=>Well, I would think a problem like this would occur when the
> >=>>=>revolution of
> >=>>=>the CV's etc was sympathetic with the frequency of whatever is
> >=>>=>vibrating.
> >=>>=>It would climb when it gets close, peak, then drop out as you
> >=>accelerate
> >=>>=>through.  If you went fast enough, it would probably reoccur in
> >=>>=>the next 1/2
> >=>>=>division of the frequency (I think... It's been a while since
physics
> >=>>=>class...)  I know there is a principle concerning this.  I apply it
to
> >=>>=>guitar playing with the use of harmonics..
> >=>>=>
> >=>>=>If the same item would be causing the vibration (we're ASSUMING at
> >this
> >=>>=>point) in all Rocc's, different cars would have vibration
> >=>>=>occurrences at a
> >=>>=>slightly different range of speeds, due to different tire
> >=>sizes.  (bigger
> >=>>=>tires have greater speed at same RPM than smaller tires)
> >=>>=>
> >=>>=>With 195 50 R15's, mine peaks at around 75-77 mph
> >=>>=>
> >=>>=>
> >=>>=>**Drew Teague**
> >=>>=>Harrisburg, PA
> >=>>=>
> >=>>=>'84 8v Rocco --  "Bruise"
> >=>>=>'85 BMW 318i
> >=>>=>
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