Fitting electric power steering

I've bought a trw electric power steering pump from a Vauxhall with the plan of fitting it in the frunk. I'll be honest and say that I haven't actually looked at it yet but I need some help. There are some nice pictures online of how they are mounted but where I'm stuck is how do I sort the pipes and how to route them. Should I take the rack off and take it to a hydraulic hose specialist to have the hoses braised on to the existing fittings? Where can I feed the pipes through into the frunk? Slightly random but I'mplanning on fitting a small battery. Would there be any issues with the current draw while the cars running? As usual, all helps welcome. I'd like to get this sorted so I can move onto the next headache :floor:

...a signature of the 996 and earlier 911s is it's sublimely tactical steering feel...why on earth would you want to replace this with electric steering from a Vauxhall Zafira ? Each to their own...but really :dont know:

I don't see why that would change. The rack doesn't know what is sending the fluid. MC

It can only improve the car by allowing the heavy old pump to be removed, along with the long pipes that go with it. Ned, you have probably reached this stage already, but my next step would be to ascertain the types ans sizes of unions required at each ends of the hoses and then approach a hydraulic hose specialist to knock some up once you've figured out your routing/spec. If your hoses at the rack end are anything like mine then you wouldn't really want to re-use them.

...the pump valving, weighting etc will influence steering feel, will it not ? There will be an engineered synergy between the respective steering components which equate to the sensation experienced at the wheel... Fiddling with this will corrupt this critical Porsche feature...can't see that a substitution involving a Vauxhall zafira part is going to improve it :dont know:

I think the Zafira pump runs continuously, just as a mechanical pump does. Presumably as long as it supplies enough fluid at the right pressure the rack can work normally. It's not like a modern ePAS system which uses an electric motor for assistance and only operates when the wheel is turned. The latter is the system I have on my S2000 and frankly it's brilliant. I can't even tell it's there. But I had a Civic with the same and it was awful. Steering was momentarily stiff until the system detected I was turning the wheel, then suddenly the assistance came in. Horrible. Ned I'm quite intrigued by this (despite no longer having a 996). A bit of googling suggests the pump requires an 'engine running" signal and that it may even have a PAS ecu. Also that the pump does draw a fair bit of power and is troublesome if the battery is weak. I'm sure you'll get it done but it seems there may be some fiddling and faffing required! On a separate note, your perpetual enthusiasm does amuse me! Personally I'd stick to one thing at a time, but my posts would be boring!! Good luck with it.

I'm glad I amuse someone :floor: This is basically the system that the cup cars use and seems to be getting more popular. I might have to be careful selecting a battery after this but my current Yuasa 3017 weighs in at 21.2kgs according to google. I'm not going mad with the weight but that is brutally heavy. As far as one thing at a time goes, I've spent 2 weeks in the house with a new born, I may not be hands on in the garage but I'm getting a plan sorted. I made polybushes this week for my dog bones and will make the rest when I get a chance. Martin I'm not sure about the unions yet, are the ones porsche use not hard to get hold of? I may have that wrong but I was under the impression that they're hard to get out of the rack without breaking and very expensive. I had thought that there would have been a few guys in here that had been down this road, maybe not. Either way, I'm all ears

I have a pump, haven't done anything with it yet. MC

Mc we'll have to develop something between us :thumb: On the bushes, I'm back to work tomorrow so I'll sus them out if I can get hold of the boy

When ever we are doing something more unusual at work or just need things like different coloured wiring then this place is pretty good ... https://www.carbuilder.com/uk/

Thanks Demort. I'll give it a look when I get a chance. I'd say it'll probably be a local job to get the pipes made though. Haven't even thought about the wiring side yet.

I have successfully done this, and proven on track. - When I get the time I will list all of the items required and how I went about fitting. The pump is a TRW pump that can be bought from Porsche Motorsport, as the pump is fitted to 997 & 991 Cup cars. Porsche themselves actually do a kit to convert a GT3 but it will not fit an M96 as the PAS delete pulley and various other parts differ. Someone noticed that the very same TRW pump is also used on lesser models, i.e Vauxhall Zafira, thus can be had for significantly less than Porsche want. Sourcing the pump is the easy part its everything else that was the difficult. In doing the mod you will not save significant weight, and you will not gain significant power. - I saw the benefit for fitting being increased reliability.

Chap on the 996 Facebook group did this - Aivars Riddlers. Matt Faulks/PPBB commented about the control software being the most involved part of the whole thing, rather than the physical plumbing. I'm kind of interested in this modification (frees up a pulley location) and kind of not (takes up boot space).

Hi crash. I have the pump and am keen to do it. I have a whine which I suspect is my standard ps pump so that's my main push for doing it along with the desire to give my self a headache :floor: Any help would be greatly appreciated

Dammit I have that on fb. I think Matt said there is a newer version which uses its own Ecu but aivars is the older simpler pump, just like what I'm doing