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  1. #1
    Join Date
    May 2017
    Posts
    110

    MR 2 electric hydraulic power steering pump

    Anyone have experience using a electric/hydraulic power steering pump? (Second gen MR2 or early 2000s Mini)
    I have found some info primarily in the EV world. Looks like it could be a solution for my EcoBoost swap. The one question I have not found a answer to is has anyone out there been able to find a way to control the pump pressure relative to speed?

  2. #2
    Join Date
    Sep 2010
    Location
    Beach Park IL
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    2,405
    Country Flag: United States
    I looked into this briefly and it seemed like they draw a lot of amperage. It seemed the better option was to use the electric power module on the column.
    Donny

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  3. #3
    Join Date
    May 2017
    Posts
    110
    Donny, that is true they use 75+ amp fuses and relays. I am told by the EV guys that the high amp draw is in parking or lock to lock situations. I have been looking at the Saturn Vue and Toyota units. I have a space problem under my dash.
    More research need

  4. #4
    Join Date
    Apr 2006
    Location
    Atlanta, GA
    Posts
    102
    Here's one of the best write-ups Ive seen on the MR2 pump-

    https://honda-tech.com/forums/road-r...edone-2528249/


    Pretty neat piece- uses a speed sensor to turn off at highway speeds and a stepper motor with integrated controls.




    I was also looking at using a Mercedes Benz electric pump too- Only used on the A-class (Euro )

    Mercedes Benz electric power steering pump-

    The electric pump is rated at 950PSI- I don't know the GPM of the M-B pump. Stock GM pumps ( C3 Corvettes for example) 2.9 GPM- where the upgraded pumps are around 3.3GPM (Chevy Astro Van pump)








    HOWEVER- after looking at all the options-

    I ended up using a fully electric motor on the column from a 2010-12 Nissan Cube- electronic controls are on separate module- but pretty much self contained.








  5. #5
    Join Date
    May 2017
    Posts
    110
    Thanks great info. I have looked at a install like yours. In my case the motor will sit under the Left side turbo. I have been told that is isn’t a good idea. Yours is relitively close to your exhaust have you had any issues and how long have you had it installed?

  6. #6
    Join Date
    Apr 2001
    Location
    The Druid City
    Posts
    14,636
    Country Flag: United States
    Hey Richard,



    I see that you mounted the EPAS unit in the engine compartment. I've been doing a lot of reading on the various EPAS solutions and there seems to be some debate as to whether the electronic steering units can be used in a high heat/wet environment. All the OEM installations have the EPAS units under the dash. I'd like to do the same on my Cougar and I think it would be a lot easier to mounts the EPAs on the bottom of the column in the engine compartment. I already have 2 Toyota Prius units and the electronics.

    I just want to hear your thoughts on all that.

    Andrew
    1970 GTO Version 2.0
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