Impreza steering rack mod

[Penelope Stopit]

The below circuit can easily be altered so that it connects to the fuel pump relay rather than the alternator, thanks to phazed for pointing out that if the circuit is wired to the fuel pump relay, when the fuel pump primes it also acts as a PAS circuit test by running the PAS Pump during the fuel priming and you should be able to hear it run

When using electric PAS there is the advantage of being able to keep the PAS working even if the engine cuts out as long as the battery is good
The operation is simple
1) Turning the ignition on switches a negative through a relay to the main pump relay coil
2) The alternator switches a positive through a relay to the main pump and its relay coil which activates it
3) The main relay once activated holds itself in by switching its own switched positive to its own relay coil
4) The hold-in circuit is broken by turning the ignition off and the cycle is ready to go again

Edited by Penelope Stopit on Thursday 22 February 17:49

[Penelope Stopit]

WinstonWolf said:

Penelope Stopit said:

WinstonWolf said:

Use a self latching relay?

I'm not 100% sure what you mean by self latching but it does sound close to the method I was thinking about
I've now sorted it and will post in a while, see what you think

Rather than me try to explain it there's a million and one circuit examples on Google that you could adapt

A self latching relay is NO, it just requires an energising current to switch it, it then stays closed until power is removed. Give it a switched live, energise from the starter circuit and it will stay latched until the ignition is turned off. If you feed it a permanent live it'll never switch off

I understand now, well I think I understand, I think you must have misunderstood something that you read on the internet, I think you possibly read about a relay hold-in circuit that someone had called a self latching relay. I think......?????but really don't know

[phazed]

I'm happy with everything now so I will shut up!

[Penelope Stopit]

phazed said:

I'm happy with everything now so I will shut up!

Never shut up, opinions are everything, I didn't even consider what you pointed out, it's clever and I like clever

[carsy]

Penelope Stopit said:

Connect the blue/white cable to the alternator warning light terminal, the pump will only run when the alternator is charging

Sorry this is what i meant to say.

[WinstonWolf]

Penelope Stopit said:

I understand now, well I think I understand, I think you must have misunderstood something that you read on the internet, I think you possibly read about a relay hold-in circuit that someone had called a self latching relay. I think......?????but really don't know

It’s just terminology, everyone called them self latching where I worked

[Penelope Stopit]

Ahhh ok, thanks

[wuckfitracing]

Just finished fitting the new Subaru rack with Vauxhall Astra electric steering pump. Not had chance to drive it but early testing suggests its a massive improvement over the manual rack. I can now with almost 1 finger turn it lock to lock. I did do a full photo build and a parts number list from start to finish but it needs finalising and its a big document. I hope to be able to make it available when I have a little time to everyone.
Many thanks to all those who helped along the way.
Colin

[phazed]

Well done! I hope your test drive is all it should be.

[N7GTX]

Daz, where are you? The very nice man has finished his and is going to do all the manual Chims out there.......

[Classic Chim]

N7GTX said:

Daz, where are you? The very nice man has finished his and is going to do all the manual Chims out there.......

He’s second in line, I’m first :Laugh:

Really cool Colin, this is my next big goal.

[wuckfitracing]

Thanks chaps for the wind up, but I had a second set of spacers made up for Daz and I have some other bits for him as well. He just needs to find a rack and we should be able to sort his.

[N7GTX]

wuckfitracing said:

Thanks chaps for the wind up, but I had a second set of spacers made up for Daz and I have some other bits for him as well. He just needs to find a rack and we should be able to sort his.

Excellent. I bet Phazed (Peter) is relieved.......

[phazed]

Relieved isn't the word! I've done 2 already......

[Classic Chim]

wuckfitracing said:

Thanks chaps for the wind up, but I had a second set of spacers made up for Daz and I have some other bits for him as well. He just needs to find a rack and we should be able to sort his.

Totally. I’m a year away before I get serious with this one

[SILICONEKID 345HP 12.03]

I'm trying to find another rack ,I was given a refund because it did not turn up.
I'm looking for new one or used .
Anyone help ?

[SILICONEKID 345HP 12.03]

SILICONEKID 345HP 12.03 said:

I'm trying to find another rack ,I was given a refund because it did not turn up.
I'm looking for new one or used .
Anyone help ?

This is going to be the decider if I keep or sell because my steering has always been a problem ..
Very annoying and not nice to drive .

[phazed]

There are literally scores for sale Daz!

[SILICONEKID 345HP 12.03]

Peter can direct me to the one same as the one which did not turn up ?

I will need a reputable company to refurbish it .Thanks

[phazed]

SILICONEKID 345HP 12.03 said:

Peter can direct me to the one same as the one which did not turn up ?

I will need a reputable company to refurbish it .Thanks

This seems to be the one Daz.

https://www.ebay.co.uk/itm/SUBARU-IMPREZA-1992-200...

I was lucky with my ones. I cleaned them up and fitted them and they didn't leak or have any play in them! The are much better quality than the TVR racks.