[Shotimes] Re: Adjusting Steering Rack height to compensate for lowere

[Carl Prochilo]

Okay, I found the article on shotimes about this.  What are the
units in this note for the 0.3?  Inches?

"A lowered SHO (Eibach springs) will tend toward bump steer, this is
because the tie rods are just about level when the suspension is
nominal, and when it's bumped, the tie rod effectively gets shorter,
causing the tire to toe-out, which decreases steering stability. The
only way I've found around this is to raise the steering rack, so
the tie rods have a bit of downward slant again. I've raised my rack
0.3 and found that bump steer is just about eliminated. ( damn,
there goes one of my secrets...)"

-- 
Cheers,
Carl Prochilo
1992 Ultra Red Crimson

Paul L Fisher said:
> I believe you put washers on the bolts that hold the rack so that
> you lower
> the rack. I think there is an article on www.shotimes.com on it.
>
>
> Paul L Fisher
>
> 1999 Ford Taurus SHO TR 64K - Stock. Kirk'ed.
>
> Visit my website: http://www.paul-fisher.com
> SHOClub Member: http://www.shoclub.com
>
> -----Original Message-----
> From: shotimes-admin@autox.team.net
> [mailto:shotimes-admin@autox.team.net]
> On Behalf Of Carl Prochilo
> Sent: Friday, April 16, 2004 12:50 PM
> To: Donald Mallinson
> Cc: techsho@topica.com; shotimes@autox.team.net
> Subject: Re: [Shotimes] Re: Adjusting Steering Rack height to
> compensate for
> lowere
>
> .
>
> Okay, now I got this understood.  I may actually be feeling this
> moderately.  I think the 235s also accentuate the effect.  So, what
> is the procedure to correct the geometry?
>
> Don, forevermore when I stare at a wall I'll be thinking of bump
> steer.  ; )
>
> --
> Cheers,
> Carl Prochilo
> 1992 Ultra Red Crimson
>
> Donald Mallinson said:
>> As the name implies...when you hit a bump, the steering
>> wheel will move and tend to steer the car one way or the
>> other.  It is due to the steering arms being at an angle to
>> the centerline of the mounting points.
>>
>> Here is an example.  stand so your side is to a wall.
>>
>> stand so when you hold your arm EXACTLY straight out at a 90
>> degree angle that your fingertips just brush the wall.
>>
>> Then step a couple inches closer to the wall and hold your
>> arm so the fingers just touch the wall.  Your arm will be at
>> an angle now, it can't be straight out.  If you try to raise
>> your arm, your body has to move.  Same thing with the
>> steering gear.
>>
>> When you lower your car the TOE adjustment will be way off.
>>   So you lengthen the steering arms to get toe back in line.
>>   Now when you hit a bump, the longer arm pushes back and
>> can cause the car to go a bit "off line" or move around.
>> To some people it is a bother.
>>
>> Don Mallinson
>>
>> Carl Prochilo wrote:
>>> ==========================================================>> Need
>>> to find the right school to fit your needs
>>> CollegeInformation.info has already found it. Get educated
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>>> ==========================================================>>
>>>
>>> .
>>>
>>> Maybe I haven't experienced this.  What exactly would I feel?  A
>>> bump when turning the wheel?  There is no doubt the
>>> Tokico/Eibachs
>>> lowered the car and altered the geometry.  How do you know how to
>>> make the adjustment so the steering is optimal?  Is there
>>> something
>>> I can measure or inspect?
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>
>
> --
> Cheers,
> Carl Prochilo
> 1992 Ultra Red Crimson
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