Most older cars (designed before computer analysis of harmonic vibrations)
have a particular speed at which they are particularly prone to vibration.
Generally this was above or near the top of the normal speed range. In my 66
B it occurs around 62mph (indicated). At higher speeds it smoothes out
again.
Your situation sounds a little more aggravated than that. There are a lot of
potential contributing factors. Wheel balance, front end alignment,
condition of front suspension bushes, shocks, wheel bearings and steering
rack, condition of rear axle mountings, and u-joints are some that come to
mind.
The MGB is certainly not the most vibration-free car in the world, but it
should be reasonably tolerable at speeds up to and above any US speed
limits.
on 5/9/02 7:03 AM, Aubrey Schneider at aschneider@shaw.ca wrote:
> Dear Listers,
> There have been a few anecdotes from various listers covering long
> distance drives.
> In these accounts, I read of speeds of 75-80 mph and am amazed.
>
> When I achieve 70 miles an hour my B starts to do "the heebie jeebies."
> After that the, rock n' roll (I'm a child of the 60's) and pretty soon
> the entire car is on board as we shake, rattle n' roll down the highway.
>
> Should my B be smooth at 70, or is the movement normal?
> 'Twill be interesting to see what responses to the above, if any.
> Aubrey 75B
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
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