MR 2 electric hydraulic power steering pump

[Boosted Falcon]

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?

[dontlifttoshift]

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.

[Boosted Falcon]

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

[Richard454]

Here's one of the best write-ups Ive seen on the MR2 pump-

https://honda-tech.com/forums/road-racing-autocross-time-attack-19/ehps-redone-2528249/


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

https://static1.pt-content.com/images/pt/2018/01/EH20PumpJPG-1.jpg


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)


https://static1.pt-content.com/images/pt/2018/01/mercedesw168lift2004a190a1684660601-1.jpg

https://static1.pt-content.com/images/noimg.gif



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.




https://static1.pt-content.com/images/pt/2018/01/80img_09201_cddc758e642b84ec2da2700e71c6-1.jpg


https://static1.pt-content.com/images/pt/2018/01/80dscn6787_84bfaaab096b3929334071a55d64e-1.jpg

[Boosted Falcon]

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?

[andrewb70]

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