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Old 10-27-2008, 09:20 PM   #1 (permalink)
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Power steering

This was posted in a different thread,By Donnie B. I thought it should have it own.

JimO,
I was at FF5 in May and they had the power steering installed in the GTM. They will tell you how and what to buy if you want to do it. I believe the only thing that was not purchased off the shelf was the power steering hoses.
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Old 10-27-2008, 10:23 PM   #2 (permalink)
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When I asked Jason about power steering he sent me this:

"Power steering is definitely something Id recommend its really nice. Just get a power rack for an 87-93 Mustang GT, and we have adapters available here for the steering shaft. Then youll just need an electric pump (unless youre not running AC) and have some lines made up."
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Old 10-27-2008, 11:49 PM   #3 (permalink)
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I believe the pump they are using is the Subaru XT electric pump. I understand they are a bit pricey. Im still looking into making an adapter to run the stock C5 pump with a smaller pulley and changing the location of the pump. Its quite small, so theres a small chance it would work based on the short look I had.

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Old 10-28-2008, 12:32 AM   #4 (permalink)
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Power Steering was surprising and well worth it. If I ever do antoher car I will definitely do it.
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Old 10-28-2008, 02:16 AM   #5 (permalink)
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Quote:
Originally Posted by David Borden View Post
I believe the pump they are using is the Subaru XT electric pump. I understand they are a bit pricey. Im still looking into making an adapter to run the stock C5 pump with a smaller pulley and changing the location of the pump. Its quite small, so theres a small chance it would work based on the short look I had.

David
Correct - Jason told me today that is what pump they used. He said he is going to research and see if there are any better solutions.

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Power Steering was surprising and well worth it. If I ever do antoher car I will definitely do it.
Did you end up changing over to power steering? I'd hate to waste the shiny new GTM steering rack and throw an old mustang rack in there.
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Old 12-21-2008, 09:18 PM   #6 (permalink)
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Power Steering Update

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Originally Posted by spytech View Post
Correct - Jason told me today that is what pump they used. He said he is going to research and see if there are any better solutions.


Did you end up changing over to power steering? I'd hate to waste the shiny new GTM steering rack and throw an old mustang rack in there.

Does anyone have any updated information about power steering in the GTM
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Old 12-22-2008, 02:44 AM   #7 (permalink)
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What year Subaru XT ? Price? Just the power streeing pump or does it come with the electric motor?

The mustang rack and pinion steering with the 15.0:1 Right?
What other stuff do you need?


Thanks for the info. Ron, Happy Holidays
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Old 12-22-2008, 08:01 AM   #8 (permalink)
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Been posted here before but perhaps worthy of a repost.....

And this would allow you to maintain the nice GTM steering rack. I don't think the amount of assist is variable though...

http://www.unisteer.com/mm5/merchant...+ELECTRA+STEER

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Old 12-22-2008, 01:11 PM   #9 (permalink)
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Been posted here before but perhaps worthy of a repost.....

And this would allow you to maintain the nice GTM steering rack. I don't think the amount of assist is variable though...

http://www.unisteer.com/mm5/merchant...+ELECTRA+STEER

Has anyone successfully mounted one of these in a GTM? The space between the joints of the steering shaft are extremely tight...
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Old 12-22-2008, 01:25 PM   #10 (permalink)
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Looks like it would be VERY tight indeed. There's not enough room between the rack and flange bearing to put it, and putting it under the dash....I'm guessing would require some serious mods to the frame and pedal-box area to make it fit. Surely the brake light switch would have to be re-located so that bracket could be removed to make room also.
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Old 12-23-2008, 12:27 AM   #11 (permalink)
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you would first need to find a quicker rack. The problem with the existing rack isnt that its heavy, its actually quite light... but the steering is slowwww for the type of car. I wonder if you can find a similar rack with a quicker ratio. The rack is the same size as one in a late 80's early 90's mustang GT.

Im still going to look into mounting the stock PS pump on the front of the motor but wont be taking it apart until I go to add the crossover for the fuel tanks this winter. I would use the mustang rack if I can get it to work.

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Old 12-23-2008, 01:50 AM   #12 (permalink)
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I found a quick ratio power mustang rack and the Subaru Pump... im going to mount the pump to the frame above the cooling fans on the driver side... will post pictures when I get it mounted.
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Old 12-23-2008, 01:13 PM   #13 (permalink)
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Electric PS Pump
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Old 12-24-2008, 12:10 AM   #14 (permalink)
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the MR2 pump is likely the route I'll go aswell, with a DC motor modulating switch mounted inside to adjust the amount of assist. I've read that at full speed they can be quite loud.

Any sources on the quicker mustang racks?

Thanks
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Old 12-24-2008, 12:50 AM   #15 (permalink)
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Kragen online has remanufactured MR2 pumps for $188 plus $50 core.
It comes with "lifetime warranty" whatever that means (probably means the warranty runs out when the pump dies!)
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Old 12-24-2008, 12:50 AM   #16 (permalink)
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The stock rack is a Mustang replacement at 15 to 1. The stock mustang power steering rack is advertised at 15 to 1 but in reality is more like 13.5 to one. It is pretty fast, in most cases people tend to reduce the pressure spring in the factory pump to reduce the assist. I have no problem with the manual rack. Cheers Richard.
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Old 12-25-2008, 07:34 PM   #17 (permalink)
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I found this

http://www.driveev.com/jeepev/convpgs/psteer.php
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Old 12-26-2008, 08:47 AM   #18 (permalink)
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Ford Focus / Volvo S40 & V50

The Ford Focus 2004- up uses an electrical pump w/integrated tank I think. also the Volvo S40 and V50 from about the same years.
Swedish listings of used such pumps show prices around 2000 SEK = $250.

It's a pretty nice setup with the integrated reservoir, but it makes the unit tall...

Still waiting for my GTM to arrive, and I dont have measurements of the Focus pump so I have no idea if this is a possibility.

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Old 12-26-2008, 04:12 PM   #19 (permalink)
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The Ford Focus 2004- up uses an electrical pump w/integrated tank I think. also the Volvo S40 and V50 from about the same years.
Swedish listings of used such pumps show prices around 2000 SEK = $250.

It's a pretty nice setup with the integrated reservoir, but it makes the unit tall...

Still waiting for my GTM to arrive, and I dont have measurements of the Focus pump so I have no idea if this is a possibility.

/Thomas

Thats an interesting set of options... Most of what I have read about the focus has been good as far as handling and responsiveness, so maybe the pump might work. Anyone here have a focus, or work for a ford dealership to get an idea what this thing looks like?

Hopefully, it or the Volvo pump is self contained and doesnt rely on a computer to control it.

David
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Old 12-26-2008, 04:37 PM   #20 (permalink)
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nice options,

you guys are scary what you come up with!

Glad you're not terrorists...or are you just a sleeper cell?
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Old 12-26-2008, 09:19 PM   #21 (permalink)
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I found this post with some very specific details on the installing a MR2 electric pump. What I find interesting, is the pump has an adjuster that allows you to adjust the pump pressure to your rack/liking...

The install was done by a racer for a race car and it appears to work well for him and the pumps should be available since the MR2 was a fairly popular car. Cost should be around $150-200 for the pump.

http://www.honda-tech.com/showthread.php?t=2222562

If someone tries this, I could machine a custom bracket for the pump if folks were interested.

Heres a link for wiring the MR2 pump.
http://www.evalbum.com/tech/mr2_powersteering.html
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Old 12-26-2008, 10:31 PM   #22 (permalink)
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That's the same thread I'd reviewed a little while ago, main complaint seems to be the noise and possibly the pump longevity considering it's always 'on'.

This is where a DC proportioning switch seems to make a lot of sense, rather than a 'bypass' adjustment for the amount of assist. Full assist in slow driving, minimal assist at speed, at the flip of a switch. I believe it's mentioned in that thread by a guy that installed it in his subaru impreza.

Of course then the solution isn't just install and forget about it, but I think that's ok.

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Old 12-27-2008, 01:03 AM   #23 (permalink)
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the MR2 pump is likely the route I'll go aswell, with a DC motor modulating switch mounted inside to adjust the amount of assist. I've read that at full speed they can be quite loud. Any sources on the quicker mustang racks?
Thanks
Aman
Any info on the DC motor modulating switch??

Roger
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Old 12-27-2008, 01:55 AM   #24 (permalink)
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Any info on the DC motor modulating switch??

Roger

Pretty sure it's just a potentiometer that uses pulse width modulation as the signal to the DC motor

http://cgi.ebay.com/DC-Motor-Speed-C...QQcmdZViewItem

Aman

Last edited by Aman; 12-30-2008 at 06:07 AM..
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Old 12-29-2008, 02:39 PM   #25 (permalink)
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Sounds like this thing could be hooked up to a small electronic gizmo that would not only allow driver adjustability with a knob, but also programability for automatic adjustment as speed varies.
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Old 12-29-2008, 05:45 PM   #26 (permalink)
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Sounds like this thing could be hooked up to a small electronic gizmo that would not only allow driver adjustability with a knob, but also programability for automatic adjustment as speed varies.
agreed... and Im also wondering if it would be possible to use the original PS ECU and tap into the LSx PCM to control the pressure. Based on the link I posted above, it appears to be fairly easy to wire if signals are compatible.

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Old 12-29-2008, 09:15 PM   #27 (permalink)
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Dave,

Now you're getting real scary...

great idea.
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Old 01-02-2009, 11:58 PM   #28 (permalink)
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The electric power steering pump from a 3rd gen MR2 spyder (2001-2005) looks like a better deal as it has a built in oil reservoir.

http://www.autozone.com/R,2253446/ve...ductDetail.htm
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Old 01-03-2009, 12:16 AM   #29 (permalink)
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The electric power steering pump from a 3rd gen MR2 spyder (2001-2005) looks like a better deal as it has a built in oil reservoir.

http://www.autozone.com/R,2253446/ve...ductDetail.htm
I believe the earlier 90's pumps have an adjustable valve that will allow you to tune the pressure and feel of the steering.

David
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Old 01-03-2009, 12:19 AM   #30 (permalink)
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I'm sure that you could do the same by running the pump on a lower voltage, (using a cheap speed controller .. pwm modulation)
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