[Shotimes] Vibration or picky...again

[Mike Bruce]

It's possible that your wheels are not seated exactly flush and centered
on the studs.  This would cause a vibration that is noticeable at
certain speeds.  I have this problem with the Wilwood rotors on my SHO.
I find that if I tighten each lug by hand while rapping on the rim with
a mallet, I can get the lugnuts to take a perfect seat and ensure that
the wheel is centered on the hub.  

-----Original Message-----
From: shotimes-admin@autox.team.net
[mailto:shotimes-admin@autox.team.net] On Behalf Of
cmichaelo@optonline.net
Sent: Monday, February 07, 2005 7:54 PM
To: Mike Bruce
Cc: 'shotimes'
Subject: Re: RE: [Shotimes] Vibration or picky...again

Vibration can be felt throughout the car, but especially in the
dashboard.

You can just visually see the dashboard vibrating.

This vibration happens with all of my wheel combos (two 235/45-17 and
one 235/40-18), but is somewhat more pronounced with the 40 seris tires.

All wheels are balanced. Rims are "true" both radially and laterally. 

The vibration is felt in one (sometimes two) particular mph "spots".
You go 3mph faster or slower and then there's no vibration.  So it's a
resonance thingy.

Just to add aggravation to the whole thing, depending on which of the
five positions you can mount a wheel on the hub, these mph "spots" move
around quite a bit.  The spots can be as low as 65mph or as high as
85mph.

Ball joints are new. Tie rods are new.

The only thing that is not new is the front wheel hubs and bearings and
CV axels.

I've tested the bearings with the "twist the wheel up and down" method.
No movement at all.

I had an accident (or someone who borrowed my car actually) many years
ago when he severely bent a front rim and dislocated the upper strut
mount.  I have since then replaced struts, springs, and brearing mount.

Is it possible that something could have happened to the wheel bearing
or the studs in the hub?

Michael
94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau
SHO items for sale: http://hometown.aol.com/cmichaelo/for_sale.html

----- Original Message -----
From: Mike Bruce <shoitoff@verizon.net>
Date: Monday, February 7, 2005 7:03 pm
Subject: RE: [Shotimes] Vibration or picky...again

> My ATX is pretty smooth at speed unless it's been sitting for a few
> days.  It's got a similar setup to yours except for slicers.  My
> father's 92 track car is so smooth a high speeds, you feel as 
> though you
> are floating (needs downforce).  Bumps are another matter...
> 
> So there's no vibration above or below 70-80?  Where and when do you
> feel the vibration the most?  Brake pedal, steering wheel, dash, seat,
> etc.  Cruising or during acceleration?
> 
> Maybe a worn ball joint or out of balance tire/wheel.
> 
> Mike Bruce
> 
> -----Original Message-----
> From: shotimes-admin@autox.team.net
> [shotimes-admin@autox.team.net] On Behalf Of
> cmichaelo@optonline.net
> Sent: Monday, February 07, 2005 6:42 PM
> To: shotimes
> Cc: cmichaelo@optonline.net
> Subject: [Shotimes] Vibration or picky...again
> 
> I'm noticing a noticable, but only somewhat annoying, vibration in my
> car somewhere around 70-80mph.
> 
> If someone was in my car, I think it's likely that they would 
> notice the
> vibration. One of you guys would.  But the question is if you 
> would find
> it objectionable.
> 
> I have TPR bushings throughout, alu SFB, torque converters, Koni,
> Intrax, 235/40-18 on 8.5 rims, pilot sport tires.
> 
> Do any of you with equal or tighter cars have a vibration free 
> ride at
> high speeds?
> 
> Am I being naive in assuming that I can possibly achieve vibration 
> freeride after having replaced most of the vibration absorbing 
> components?
> Michael 
> 94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau 
> SHO items for sale: http://hometown.aol.com/cmichaelo/for_sale.html
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