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Variable Ratio Power Steering
01-04-2018, 01:57 PM
Post: #1
Variable Ratio Power Steering
Hi All,

When engaging in spirited maneuvers, the variable ratio power steering is annoying. I cleaned that sentence up for you. Basically, the amount of crank on the wheel is inconsistent. So, I'd love to delete the variable ratio part of my power steering on the 2005 Town Car. I see Rock Auto has both rack and pinion systems with and without the electronic variable ratio orifice. Does anyone know if it's just a basic swap, or is it a hairball? Does electronic mean possibly throwing codes?

Better yet, can I swap something in there that has a faster ratio?

Thanks,
Frank
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01-05-2018, 01:30 PM
Post: #2
RE: Variable Ratio Power Steering
(01-04-2018 01:57 PM)AZSenior Wrote:
 
Hi All,

When engaging in spirited maneuvers, the variable ratio power steering is annoying. I cleaned that sentence up for you. Basically, the amount of crank on the wheel is inconsistent. So, I'd love to delete the variable ratio part of my power steering on the 2005 Town Car. I see Rock Auto has both rack and pinion systems with and without the electronic variable ratio orifice. Does anyone know if it's just a basic swap, or is it a hairball? Does electronic mean possibly throwing codes?

Better yet, can I swap something in there that has a faster ratio?

Thanks,
Frank

If you're ok with full assist you might get away with just unplugging the solenoid that controls it. I don't know if it's on the rack or the pump for the later cars.
The steering is abysmal on my 04 TC, dead, numb, etc but I haven't noticed the assist changing other than more at low speeds and less at high.
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01-05-2018, 02:13 PM
Post: #3
RE: Variable Ratio Power Steering
(01-04-2018 01:57 PM)AZSenior Wrote:
 
Hi All,

When engaging in spirited maneuvers, the variable ratio power steering is annoying. I cleaned that sentence up for you. Basically, the amount of crank on the wheel is inconsistent. So, I'd love to delete the variable ratio part of my power steering on the 2005 Town Car. I see Rock Auto has both rack and pinion systems with and without the electronic variable ratio orifice. Does anyone know if it's just a basic swap, or is it a hairball? Does electronic mean possibly throwing codes?

Better yet, can I swap something in there that has a faster ratio?

Thanks,
Frank

Thank you for the response. I'm not sure I was smart enough to state the problem I'm having, so lemme' try again.

Variable ratio on this car to me, means the effort to move the wheel is always the same. What changes is the amount of lock carried to the front wheels. If I move the steering wheel abruptly, the turn in is much greater than if I don't move the wheel as hard. This is disconcerting in a double apex corner, or one that has a decreasing radius. I could probably live with it, I mean that's why it's called "driving", I just thought there might be a way to make the feel more linear.

Cheers,

F.
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01-05-2018, 05:47 PM
Post: #4
RE: Variable Ratio Power Steering
(01-05-2018 02:13 PM)AZSenior Wrote:
 
(01-04-2018 01:57 PM)AZSenior Wrote:
 
Hi All,

When engaging in spirited maneuvers, the variable ratio power steering is annoying. I cleaned that sentence up for you. Basically, the amount of crank on the wheel is inconsistent. So, I'd love to delete the variable ratio part of my power steering on the 2005 Town Car. I see Rock Auto has both rack and pinion systems with and without the electronic variable ratio orifice. Does anyone know if it's just a basic swap, or is it a hairball? Does electronic mean possibly throwing codes?

Better yet, can I swap something in there that has a faster ratio?

Thanks,
Frank

Thank you for the response. I'm not sure I was smart enough to state the problem I'm having, so lemme' try again.

Variable ratio on this car to me, means the effort to move the wheel is always the same. What changes is the amount of lock carried to the front wheels. If I move the steering wheel abruptly, the turn in is much greater than if I don't move the wheel as hard. This is disconcerting in a double apex corner, or one that has a decreasing radius. I could probably live with it, I mean that's why it's called "driving", I just thought there might be a way to make the feel more linear.

Cheers,

F.

Entirely possible I missed it, but I thought these cars simply had variable assist, just like the older models? I can feel it in mine for sure, never noticed a change in ratio, not sure how that would be accomplished without some serious trickery in the rack. Even if that's the case, seems like one could electrically convince it to stay in one setting/ratio. I'll check my service manuals later, I imagine my 04 is the same stuff.

If the cop cars or such had a faster ratio rack it might be worth swapping anyway if you do a lot of spirited driving.
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01-07-2018, 10:46 PM
Post: #5
RE: Variable Ratio Power Steering
According to the factory manual on my 04, there is only variable assisted steering, not variable ratio. It's pretty much the same setup they used since about 1990 if not before, pwm controlled valve run by the air suspension module. VAPS for variable assist power steering they called it in 04 at least.


(01-05-2018 05:47 PM)wolf_walker Wrote:
 
(01-05-2018 02:13 PM)AZSenior Wrote:
 
(01-04-2018 01:57 PM)AZSenior Wrote:
 
Hi All,

When engaging in spirited maneuvers, the variable ratio power steering is annoying. I cleaned that sentence up for you. Basically, the amount of crank on the wheel is inconsistent. So, I'd love to delete the variable ratio part of my power steering on the 2005 Town Car. I see Rock Auto has both rack and pinion systems with and without the electronic variable ratio orifice. Does anyone know if it's just a basic swap, or is it a hairball? Does electronic mean possibly throwing codes?

Better yet, can I swap something in there that has a faster ratio?

Thanks,
Frank

Thank you for the response. I'm not sure I was smart enough to state the problem I'm having, so lemme' try again.

Variable ratio on this car to me, means the effort to move the wheel is always the same. What changes is the amount of lock carried to the front wheels. If I move the steering wheel abruptly, the turn in is much greater than if I don't move the wheel as hard. This is disconcerting in a double apex corner, or one that has a decreasing radius. I could probably live with it, I mean that's why it's called "driving", I just thought there might be a way to make the feel more linear.

Cheers,

F.

Entirely possible I missed it, but I thought these cars simply had variable assist, just like the older models? I can feel it in mine for sure, never noticed a change in ratio, not sure how that would be accomplished without some serious trickery in the rack. Even if that's the case, seems like one could electrically convince it to stay in one setting/ratio. I'll check my service manuals later, I imagine my 04 is the same stuff.

If the cop cars or such had a faster ratio rack it might be worth swapping anyway if you do a lot of spirited driving.
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01-08-2018, 10:55 AM
Post: #6
RE: Variable Ratio Power Steering
Thanks again, I think you're correct. Everything on this car works fine, I guess I just miss the better feel/feedback I got from other cars. I need to spend more time with this one.
F.
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01-08-2018, 12:42 PM
Post: #7
RE: Variable Ratio Power Steering
(01-08-2018 10:55 AM)AZSenior Wrote:
 
Thanks again, I think you're correct. Everything on this car works fine, I guess I just miss the better feel/feedback I got from other cars. I need to spend more time with this one.
F.


Mine feels like crap from any performance standpoint, heavy, dead, it turns the wheels with acceptable effort is about all the good I can say about it. These cars don't feel right with a rack imo.
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01-14-2018, 11:44 AM
Post: #8
RE: Variable Ratio Power Steering
just a thought:
is your air suspension switch ON?
I ask because I have converted many Ford vehicles from air to coils and there is a method to disable the air suspension warning message.
some lazy folks just unplug the module entirely. Others do it right and just cut the signal wire in the harness that triggers the warning message and then turn the trunk switch back ON.
those that simply unplug the module are not aware of the other equipment controlled/shared by the module, including the variable power steering system.
Former Lincoln Mark VIII owner/specialist
Former P71 owner
Current 2006 MGM owner
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