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Author Topic: Unisteer EPS vs OEM EPS w/Aftermarket control  (Read 1279 times)

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fabr

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Unisteer EPS vs OEM EPS w/Aftermarket control
« on: September 21, 2015, 05:53:27 AM »
Had you considered just using an electric power steering unit? They work very well.
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Simon

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #1 on: September 22, 2015, 04:04:55 AM »
Yea, I seen them mate - not a fan because they transfer a heap of load though the steering rack, unis and shaft to the worm and wheel of the rack.

I have make a power steering pump output before - worked well, but very hard on the pump  because of the RPM
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fabr

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #2 on: September 22, 2015, 06:02:59 AM »
Tons of them in use with no issues. Many are on 2000# plus cars. Mine has been going strong for 3 years now. I do agree it adds stress to the steering uj's and rack but there is no parasitic HP loss as there is with driving a pump.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein

Simon

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #3 on: September 23, 2015, 03:52:03 PM »
I hear what you are saying with the losses. I tried my mates electric unit, and I'm really not much of a fan of the feel. He reckons he still gets arm pump to, whereas I feel nothing through my hydraulic unit.

I'm trying to come up with a way to drive it from the trigger wheel stub (with a belt) at the moment. I know someone who has removed the water pump and is driving it though that shaft (no belts), but I'm petrified of breaking the little tang off. 
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fabr

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #4 on: September 23, 2015, 07:13:35 PM »
I don't like the water pump delete thing either. Sounds like something bad just waiting to happen. Not only breaking the tang but having to use an electric water pump as well. Nope,not for me.

Not trying to beat a dead horse ,just  discussing ,if you wish. I am using the Unisteer ATV EPS unit.   I actually love it. Wouldn't trade it for anything on a 2000# or less buggy.   Power assist is truly proportional to steering wheel input . I believe your mate may be using the cheaper,by far, factory unit (I don't recall the cars units that are being used)with the adjustable assist unit that are available. I agree I would not like that . Fastcorvairs make a "rack snuggy" that is a fantastic ,direct bolt on to most r&p boxes used,that takes the slop out of them and is adjustable for wear as well as rebuildable.  I'd like to address the concern for additional wear due to increased input from the EPS,FWIW I see it this way, there is likely no more input than you could seriously muscle into it or what it takes hitting a berm or rut. Honestly,on my heavy pig,I have seen no abnormal wear. 
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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dsrace

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #5 on: September 23, 2015, 08:56:24 PM »
an easy way to know which one he is using is to ask what amp fuse he is running to it. there are 3 used from what i found. the large one from the chevy suv's used a 35 amp fuse and the smaller ones used on the toyota cars like the prius i think are 20 amp fuses. the utv ones are like the prius but diff and i think use the 20 amp fuse as well. the smaller ones are like 16 amp and the toyota  ones were like 18 amps and chevy suv which is diff than the chevy car pull 30 amp at full power. there are 2 diff controllers on ebay for the factory eps units.
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fabr

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #6 on: September 24, 2015, 06:05:30 AM »
SFAIK,none of the aftermarket controllers are proportional. That makes them behave fine in the sand but some have said were twitchy on hardpack or asphalt.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
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the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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dsrace

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #7 on: September 24, 2015, 07:20:20 AM »
ya the only part of the controller that you have control of is the amount of voltage/assist so turn the knob and you have more or less. the sensitivity of the motion/tq sensor on the shaft itself was built for a heaver vehicle with the motor in the front. big dave runs the saturn vue eps and he would be a good one to ask how it has worked for him both on the sand and river bottom and prob hard pack and pavement too. now the malibu car's eps i believe is lighter duty but prob reacts the same.
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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #8 on: September 24, 2015, 07:21:36 AM »
i too have the saturn vue eps and the controller off ebay but have not installed it on my current rail. since it has a 30 amp draw at full assist i do not believe my charging system can support it. 45 amp rec reg
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fabr

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #9 on: September 24, 2015, 10:51:46 AM »
ya the only part of the controller that you have control of is the amount of voltage/assist so turn the knob and you have more or less. the sensitivity of the motion/tq sensor on the shaft itself was built for a heaver vehicle with the motor in the front. big dave runs the saturn vue eps and he would be a good one to ask how it has worked for him both on the sand and river bottom and prob hard pack and pavement too. now the malibu car's eps i believe is lighter duty but prob reacts the same.
Without proportional assist it I would tend to agree very much with Simon.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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fabr

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #11 on: September 24, 2015, 12:36:24 PM »
SFAIK those controllers will not operate the EPs proportionally.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
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Theodore Roosevelt 1907

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dsrace

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #12 on: September 24, 2015, 03:41:59 PM »
no they just fool the control box or give you the input the pcm would've been sending to the control box. i went on to unisteers site and looked at the models they offer for diff weight class's. now i cannot tell from a picture, but not only does the casing look identical to the chev malibu and saturn vue but even the body where the steering column cover bolts on looks the same. there seems to be 2 wires coming out of the body on one side where the through shaft comes out which would be the shaft sensors ( i believe they are tq sensors ) which tell the control box to add assist but when the ebay harness is added you can adjust what it's set at so not sure how it will work but like i said big dave uses it.  it would be interesting to know if unisteer has found a way to make theres proportional and how?  fabr does your gear box case have a mfg name on it? is yours the 1700 watt model? the vue would be the 170 watt unit for the 3k lb and under class? the vue would be there equivalent of 220 watt model for the heavier cars.
« Last Edit: September 24, 2015, 03:46:11 PM by dsrace »
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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #13 on: September 24, 2015, 03:45:10 PM »
No name on it at all. I'm pretty sure that all are basically same internally though. It's the control box ,IMO, that makes a big difference. Of course,many people are "happy" with a Charlynn setup................ to each his own.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein

fabr

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Unisteer EPS vs OEM EPS w/Aftermarket control
« Reply #14 on: September 24, 2015, 03:47:00 PM »
My info suggests that the ebay type control only limits the assist to what you "like" but is not proportional to input.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
"I fear the day that technology will surpass our human interaction. The world will have a generation of idiots" Albert Einstein
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