Electric Power Steering Pump Questions

[Barkychoc]

I am in the process of converting a V8S to power steering, after lots of head scratching I've decided to go the electric route for the pump as an engine driven pump is a nightmare on pre serp.

What thread are the pipe unions on the pump and rack? I understand the Saxo pump has the same thread as the standard engine driven pump - is this true?

As I'm using the electric pump option and it will be chassis mounted I don't need flexible pipes do I? I can just make up all rigid pipes?

I was thinking of taking a relay feed off the fuel pump connection - so the steering pump will not be running when the engine is off / stalled. Does it make sense to take it from here? Other options are ignition fed (too much drain without engine running?) and maybe alternator light fed - though if you then have a charging issue it may mean you have no power steering (I know battery drain would be major but it might get you out of a fix).

Possibly a bit controversial this one - the V8S is pretty tight under the bonnet, I think I can get the pump to fit but if I did something more controversial like mount the pump in the boot would this work with the length of the pipes? I'd also appreciate views on this. The only place I can see to mount the pump under the bonnet is quite near the exhaust at the front, so a boot mounted option would at least get it away from the heat (and the battery is in the boot / fuel pump is under the boot).

Thanks

Chris

[spend]

This forum is for Chimaeras, why not post your questions in a more relevant forum? S / general / major mods / susp steering...

[Barkychoc]

Because I thought the fountain of all knowledge would be in here

[spend]

First time we get asked how to open the front clam there'll be a nasty headed to your post box

Shut up before you start Iain

Seriously, more of the racers, T cars .. have used the pumps, not many on here will be familiar with the V8S engine layout either - I think you'll get a better quality of answers in the mods or general forums.

Try calling/mailing Joo - he has good knowledge of all the areas you are asking about.

[Barkychoc]

OK fair comment Dave, I'll see if the mods will move it.

[VARLEYHYD]

Tam, T350 & Sag is direct live & ground wired to 45Amp relay with 80amp line fuse, the relay switched by live from ignition.

Threads will be metric fine on pump and rack maybe JIC SAE.

HTH

G

[spend]

If you have purge valve - that gets nicely powered up with the fuel pump - I use for the accumulator and will on a Griff that needs to get rid of the mechanical gubbins. Control a relay with it using power (+fuse) from the starter battery stud.

I just think you need to consider what happens at speed if anything blows ~ you want to keep the pump going if at all possible I would imagine.