My B has always been pretty well shake-free. Maybe when everything is
"right" on the B, and the road is smooth, there is nothing to excite the
resonant vibration. But get on a bumpy road, and there you go.
I wonder what effect the stiffness of the shocks has on shake? Does anyone
have some experience here? I recently increased the stiffness of the front
shocks on my TD in a vane attempt to fix a bad shake at 55 mph. (The
resonant frequency speed of a TD?) I just tried new U-joints and the shake
has gone away (at least the violent self excited shake). Now, on a bumpy
road will stiff shocks cause more or less shaking?
BTW: I never would have suspected my U-joints if it weren't for Bob Howard's
advice about zero play. I'm amazed that a barely detectable amount of play
can cause so much shaking.
Bob Donahue (Still stuck in the '50s)
Email - bobmgtd@insightbb.com
52 MGTD - NEMGTR #11470
71 MGB - NAMGBR #7-3336
.
----- Original Message -----
From: "Skye Poier" <skye@ffwd.cx>
To: "MG Nuts" <mgs@autox.team.net>
Sent: Thursday, August 01, 2002 1:15 PM
Subject: Re: MGB shakes between 55-65
> Word on the street is Max Heim said:
> > FWIW, my personal theory is that the resonant frequency of the MGB
unibody
> > coincides with a road speed close to 60mph (62 on my speedo), so that
any
> > slight tendency to vibration is amplified at this speed. This is not to
say
> > you should live with "the shakes", only that you probably will not be
able
> > to eliminate a small amount of vibration around this speed. This is
merely a
> > supposition based on limited evidence, but I have yet to meet anyone who
> > could report zero vibration from his or her B.
>
> Zero vibration from my B after all the mech. work I've done...
> any problems do seem to show up around 60mph in particular though
>
> Skye
> 66 B
>
> --
> 1966 MGB - GHN3L Safety Fast! __,__\__
> The MGB Experience www.mgbexperience.com (_o____o_)
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