Alighnment!

W

wcapron2001

Guest
Does anyone have any suggestions for steering/suspension/alighnment?
My Amphicar gets very "twitchy" to drive at about 55-60 mph. It is
worse with four people in it and on worn pavement or over expansion
joints. The result is that you cannot relax at all on the highway.
Replacing the very bad rear shocks helped some and I have given it an
alighnment to the specs in the book. I have radial tires at 35psi
rear and 30psi front. All the steering and suspension parts seem good
and tight. I don't expect it to drive like a BMW but like a 1964
Chevy would be acceptable. Interestingly enough, before I alighned it
I had driven it to Olympia on the freeway (60 miles) and it seemed
fine. At that time it was toed-in about 1 1/4 inches and was peeling
off the right front tire. Could it be as simple as needing 3/8 of an
inch toe-in with radial tires?

Bill Capron
P.S. I caught the Celina story on Speed channel yesterday. Looks like
a lot of fun!
 
T

tommyintpa@aol.com

Guest
In a message dated 10/7/02 12:30:53 PM Eastern Daylight Time,
wcarron@qwest.net writes:


> Does anyone have any suggestions for steering/suspension/alighnment?

Hi, There are two things that you need to check. First is the nut on the end
of the drive shafts. They are the ones in the center of the rear brake drums.
They need to be as tight as is reasonable. What happens is after you
reassemble them and run them they need to be retorqued. The only other thing
is slack in the stearing box that can be adjusted out or the whole stearing
box could be moving and in need of reinforcement. Tommy in Tampa


[Non-text portions of this message have been removed]
 
J

John Friese

Guest
Hi Bill,
Assuming that you have a reasonable alignment, I would guess that you
need reduce your front tire pressure. You might try 22 lbs. and see
if that helps. I run my non-radials at 14 lbs. and the car drives
fine at 70 MPH. I've heard that you shouldn't run radials with that
low a pressure but I'm not sure why it would be alright for bias ply
and not good for radials. Perhaps their side walls are not as rigid.

John Friese


--- In amphicar-lovers@y..., "wcapron2001" <wcarron@q...> wrote:
> Does anyone have any suggestions for steering/suspension/alighnment?
> My Amphicar gets very "twitchy" to drive at about 55-60 mph. It is
> worse with four people in it and on worn pavement or over expansion
> joints. The result is that you cannot relax at all on the highway.
> Replacing the very bad rear shocks helped some and I have given it
an
> alighnment to the specs in the book. I have radial tires at 35psi
> rear and 30psi front. All the steering and suspension parts seem
good
> and tight. I don't expect it to drive like a BMW but like a 1964
> Chevy would be acceptable. Interestingly enough, before I alighned
it
> I had driven it to Olympia on the freeway (60 miles) and it seemed
> fine. At that time it was toed-in about 1 1/4 inches and was peeling
> off the right front tire. Could it be as simple as needing 3/8 of an
> inch toe-in with radial tires?
>
> Bill Capron
> P.S. I caught the Celina story on Speed channel yesterday. Looks
like
> a lot of fun!
 
C

Cap''n John

Guest
> Assuming that you have a reasonable alignment, I would guess that
you
> need reduce your front tire pressure. You might try 22 lbs. and
see
> if that helps. I run my non-radials at 14 lbs. and the car drives
> fine at 70 MPH. I've heard that you shouldn't run radials with
that
> low a pressure but I'm not sure why it would be alright for bias
ply
> and not good for radials. Perhaps their side walls are not as
rigid.

John,

Low pressure in a radial will cause the belts to seperate due to the
way they are manuafactured. So will switching radials from one side
(R/L) to the other. This is why radials are rotated differently than
bias plys are. Bias plys Have two, four or more body plies, which
cross at an angle to the center line of the tread, while radials body
cords run across the tire perpendicularly to the beads & belt plies,
which run circumferentially around the tire under the tread . This is
why radials "squish" out looking slightly low on air. If anything, I
would raise the pressure to about 32-34PSI (or reccomended pressure
listed on the tire) all around.

John
 
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