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  • Electric power steering?

    Has anybody done this?
    I realize it isn't for everybody but I am building an autox only car or maybe the occasional track day as well.

    I have a subaru elec pump and was thinking of mounting it under the car under the back seat on the pass side. It is a bit heavier than the stock pump but with the weight in the back and down low it helps my f/r weight. I just don't know how well it will work. Any experience out there?

  • #2
    Bill at DSG did it, I believe they used a MR2 power steering setup.

    Here is the only thing I could find on it through a search, but know that I've read up on it on FA possibly too.
    http://zilvia.net/f/tech-talk/184716...-steering.html
    -Monty

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    • #3
      I'm actually thinking about selling my setup if anyone is interested. The rack is modified for more flow (to work better with the quickener) along with the rack head having fittings welded on. It would include all of the AN lines, resivoir, setrab cooler and MR2 pump. The system works great but I have another alternative (that would free up some space for me) and need the money for other things. If anyone is interested, PM or email me.

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      • #4
        Bill, what is your alternative to your current set up?
        1991 Silvia Q's - SR20DE

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        • #5
          Instead of doing an electric power steering pump, why not switch to an entire electric rack/column.

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          • #6
            It would be hard to get the pivots in the right spot to not make bumpsteer any worse and it would be too expensive IMHO.

            An elec pump at full power all the time seems doable for an autox car. Probably have an on/off switch is all. If I'm not using the steering, it shouldn't draw that much while recirculating. That is what our stock pumps do.

            I would prefer nonpower steering but think it would be too hard to turn with huge race tires on it.

            According to a friend that has a new Mini, he pushes a button and the rack changes to 2.2 turns lock to lock. I would think that would have to be elec steering.

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            • #7
              Originally posted by Mr. J View Post
              Bill, what is your alternative to your current set up?
              A Denso assisted column

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              • #8
                Originally posted by [email protected] View Post
                A Denso assisted column
                Would you run that with a manual rack, coverted or otherwise?
                1991 Silvia Q's - SR20DE

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                • #9
                  Originally posted by Mr. J View Post
                  Would you run that with a manual rack, coverted or otherwise?
                  just a factory rack with a quickener or maybe a hicas one.

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                  • #10
                    there are spots available on the manual rack group buy i initiated (cnc'd and all that one... from atomic rex).
                    "hexa-dodecahedron-triple-threaded-super-eleventy-way-adjustment-spec" dampers. -Def

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                    • #11
                      Originally posted by [email protected] View Post
                      just a factory rack with a quickener or maybe a hicas one.
                      Is fitting a Denso C-EPS a viable option in a street vehicle (this may be a dumb question, but I'm curious)? And does the Denso unit come from a particular vehicle and have an independant controll unit?
                      1991 Silvia Q's - SR20DE

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                      • #12
                        I was debating switching to the quicker hicas rack for my s13...
                        Any cons?
                        1990 240sx - Aristo 2JZGTE, R154, GT37, Defsport Wilwood kit, KTS coilovers - daily driver
                        1991 civic si - B18C5 / toda / ATS / hytech - autox
                        2001 integra type R - Greddy td05-18g - garage queen

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                        • #13
                          Originally posted by Black R View Post
                          I was debating switching to the quicker hicas rack for my s13...
                          Any cons?
                          If you're not going to retain power steering or this Denso motor, then the rack will be harder to steer. That's the only con I know of.

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                          • #14
                            Bill said his MR2 unit works well. I like the looks of this type of boost.
                            It takes 10lbs off in front of the front axle. I am planning on the pump being under the back seat behind the foot well. I like a regular sized battery as long as it is in a good place and an alternator switch to kill that draw during autox.

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                            • #15
                              eh even though half the stuff i posted has been mentioned somehow i was brain dead from work and forgot about this thread and went ahead and created my own eh... as stated copy paste here n lets go from here n there lol... work is killing me lately...

                              Well I just thought I'd create a thread on the subject as I know a bunch of people spoke about this.

                              Billy mentioned something about using a denso electric power steering system that can be adjusted/self adjusted or something.

                              What kind of rack will you be using Billy?

                              http://www.globaldensoproducts.com/dcs/epss/index.html

                              Is this what you were talking about? I wanted to understand how it works. It basically goes between steering rack shaft and steering wheel? Has nothing to do with pushing fluid right?

                              If so I was just pondering on this solution long term with the true manual custom rack I'm going with... it should be useful perhaps at just low speed stuff and then be able to turn it off when not needed or something at high speed. I have yet to experience it but just a pondering thought for others as a solution as well.

                              You said you have an mr2 EPS, I've never actually touched one or seen how it works so I'm going to guess it either pushes fluid or... it goes between rack and steering wheel shaft with some kind of gears or something?

                              Cars that pop to mind with EPS are mr2, s2000, nsx, now they are all well known for good steering so can't be the wrong way to do things now is it.

                              Our racks and PS system on the other hand are old and poo no doubt... I am quite excited to do the cnc machined manual rack ordeal i initiated (apparently they are just being machined right now).

                              The mr2 uses an "EHPS" system is that electric but pushes fluid or something? That's not what I'll need as my rack will be a true manual rack.

                              How much electrical power will be necesssary on the go with this kind of system? Considering I run a race battery just pondering on different issues.

                              Mind chiming in and others wana join in on a discussion to answer some questions?

                              Regards
                              "hexa-dodecahedron-triple-threaded-super-eleventy-way-adjustment-spec" dampers. -Def

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