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2010 Prius II: Poor On-Center Steering - Page 2

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Posted by Larry Van Wormer on September 30, 2010, 3:40 am
 
A very good question, since the likely problem is insufficient caster
for good on-center feel. Wonder if it's usefully adjustable on the
Prius?

(I've found it very useful in the past to slightly increase caster
settings on the front suspension of a car, to help improve the
centering....)






Posted by News on September 30, 2010, 2:08 pm
 
On 9/29/2010 11:40 PM, Larry Van Wormer wrote:

Far more efficient than increasing toe-in scrub and drag.

Posted by Al Falfa on September 30, 2010, 3:32 pm
 

I don't understand the concern over the caster setting.  If you go back in
this thread you will see the caster question was posed in response to this:

"I increased the pressure in my tires (42/40)  to improve mileage without
seeing any measurable improvement.  The ride got rougher and the steering
became overly sensitive.  I'm going back to the the lower pressure Toyota
specifies."

I have since gone back to the recommended pressure which, in turn, restored
the ride and steering.  In other words, the steering issue was solved by
simply restoring the tire pressure to Toyota's recommended level.


 


Posted by News on September 30, 2010, 5:09 pm
 On 09/30/2010 11:32, Al Falfa wrote:

The original question was posed by 'Leftie', who has not indicated a
solution:


Al Falfa wrote:
 >
 >>    We are used to cars that self-correct a bit to keep the wheels
pointed straight while driving on the highway, but our new Prius doesn't
seem to want to self-correct. It has the 15" wheels and OEM tires, 40psi
front, 38 rear. Is this normal, and can it be improved?
 >
 > I increased the pressure in my tires (42/40)  to improve mileage
without seeing any measurable improvement.  The ride got rougher and the
steering became overly sensitive.  I'm going back to the the lower
pressure Toyota specifies.
 >
 >

    My fallback option is to go to 38/36 and see if that helps.

Posted by Leftie on September 30, 2010, 10:42 pm
 News wrote:

    That's right, and the input is generally appreciated. I thought that
maybe increasing the caster setting might help, but is there any downside?

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