[miragev]

The mercedes and opel pumps dont need a speed signal. They work at the same rate all the time.
In my friends car it works like a charm, no problem what so ever.

The other one has a opel pump in a cossie, works perfect there also.

Only three wires, main plus, earth and one to connect to ignitionkey.

Asim

so like an opel corsa or astra pump ?

and there is no problem with the steering very light at high speed ?

 

[miragev]

will the hicas still work with this mod or will i have to remove it .?

 

[Asim R32GTR]

so like an opel corsa or astra pump ?

and there is no problem with the steering very light at high speed ?

Yes, i think it was from a Astra.
But the merc pump is a lot slimmer and easier to fit, if i remember correctly the opel pump is a bit bulky. But not sure about this.

Stering will be the same no matter speed.

And the hicas will not work on a R32.

 

[miragev]

Yes, i think it was from a Astra.
But the merc pump is a lot slimmer and easier to fit, if i remember correctly the opel pump is a bit bulky. But not sure about this.

Stering will be the same no matter speed.

And the hicas will not work on a R32.

do you know what merc pump ..? from the small a class ..?

 

[Asim R32GTR]

do you know what merc pump ..? from the small a class ..?

Yes, from the small a-class

looks like this

 

[miragev]

Yes, from the small a-class

looks like this

thanks .. :thumbsup:

 

[Moops]

Any luck sourcing one of those pumps?

 

[miragev]

Any luck sourcing one of those pumps?

no not as yet but i'm in no rush as i still have the hicas fitted and this needs to be removed before i can fit an electric ps pump..

 

[godzirra]

Sorry to bump this but does anyone have one fitted?

I just bought a SW20 MR2 electric power steering pump off ebay...they're only 40-50 quid delivered.

 

[nick the tubman]

i looked into this a while back.
dont bother with saxo, peugot or mr2 electric pumps. not man enough for the job, espacially if you intend tracking it. they will fail. needs something way sturdier. electric fine for road, not sure about track use.

and dont be fooled into thinking it is a weight saving devise. i weighed both systems complete and the elctric pump assembly was heavier...

i decided against it after taking some professional advice and have fitted a neat idler tension device to stop belt lash....

 

[R.I.P.S NZ]

i decided against it after taking some professional advice and have fitted a neat idler tension device to stop belt lash....

Thats what we ended up doing with the Drag-r too, works fine.

 

[godzirra]

Found a r32 gtr that had it done but can't see the setup in detail:

Nissan Skyline R32 GTR

 

[Ian C]

EHPS (electro hydraulic power steering) doesn't come for free.
there's the electrical load it puts on your alternator to consider, especially the earlier systems which run continuously.
the more recent EHPS pumps are wired to a torque sensor on the steering column, therefore only operating when there is driver input.

If you can get the details of a EHPS unit, you'll need something capable of generating something similar to the spec below:

Flowrate: ~7 litres/minute max
Pressure relief valve (max pressure) ~85 bar

If anybody wants some technical detail how the original Unisia pumps really work, then i can help you, but ZF lenksysteme website is a good basic intro.
ZF-Lenksysteme

Conventional pump brochure here: http://www.zf-lenksysteme.com/english2/upload/edit_2/1539_12575/ZFPumpen_E_08.pdf

The ZF CP14 hydraulic pump is almost identical in performance terms to the Hitachi / Unisia F40 pump used on the RB26.



For those of you who read this info, you'll learn about the varioserve pump which is a more fuel efficient (less power consuming) convential hydraulic pump. arguably this would be a better, safer and easier conversion to make.
The impreza and lancer evo came with hitachi's variable displacement pumps, as with many other cars from europe, mainly the prestigious stuff.


Now you can make an informed decision!

Ian

 

[godzirra]

EHPS (electro hydraulic power steering) doesn't come for free.
there's the electrical load it puts on your alternator to consider, especially the earlier systems which run continuously.
the more recent EHPS pumps are wired to a torque sensor on the steering column, therefore only operating when there is driver input.

If you can get the details of a EHPS unit, you'll need something capable of generating something similar to the spec below:

Flowrate: ~7 litres/minute max
Pressure relief valve (max pressure) ~85 bar

If anybody wants some technical detail how the original Unisia pumps really work, then i can help you, but ZF lenksysteme website is a good basic intro.
ZF-Lenksysteme

Conventional pump brochure here: http://www.zf-lenksysteme.com/english2/upload/edit_2/1539_12575/ZFPumpen_E_08.pdf

The ZF CP14 hydraulic pump is almost identical in performance terms to the Hitachi / Unisia F40 pump used on the RB26.



For those of you who read this info, you'll learn about the varioserve pump which is a more fuel efficient (less power consuming) convential hydraulic pump. arguably this would be a better, safer and easier conversion to make.
The impreza and lancer evo came with hitachi's variable displacement pumps, as with many other cars from europe, mainly the prestigious stuff.


Now you can make an informed decision!

Ian

Thanks! Awesome info....

After all that (AND after buying a MR2 pump - lucky it was cheap :runaway I've decided to stick to the normal hydraulic pump. :nervous: