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Old 06-25-2019, 01:01 PM   #576
Scargod
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Quote:
Originally Posted by Haptic_ View Post
I've read through most of this thread but perhaps I missed it - has anyone installed this into a WRX GR (like the 2013 WRX hatch)?

Did you need any adapters? is a new PS pump needed (or suggested)? Is alignment needed afterwards? does VDC/traction control still work normally?

apologies if some of these are obvious questions
You sure you want to do this? You don't understand basic suspension and steering?
Yes, your questions are obvious and/or you did not read the right posts. Try a search of the thread! One hint: you will have to adjust toe. That is simple.
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Old 09-20-2019, 02:12 PM   #577
Robsyuk
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Quote:
Originally Posted by mrsaturn7085 View Post
Fired the car up for the first time yesterday and bled the system. Found out a little detail most people have overlooked (including myself) until now...

The JDM P/S pump for 13:1 racks was different...

I noticed this when I took it out for a drive and the pump was straining at 1/2 to 3/4 lock. By straining, I mean the pump was whining at this position as bad as the OEM rack would at full lock. The proper p/n for the JDM pump is 34430FE071 (or 072).

USDM pump specs:

output = 7.2 cm^3/rev
relief pressure = 1067-1165 psi

JDM 13:1 pump specs:

output = 8.5 cm^3/rev (18% increase!)
relief pressure = 1176-1277 psi

This means that not only is the JDM pump designed for almost 20% more flow, but it is also designed to operate at a higher peak pressure. I'll be ordering one before I end up burning up the USDM pump.

There is also the 344304S000 motorsport pump - I don't know exact specs, but I know it has an even higher flow rate and pressure... as well as an advisory to replace it every racing season. It is entirely possible the F-type GDB models received this as the OEM pump for 13:1 rack applications, and that 344304S000 was simply the p/n to retrofit the A- through E-type models. Given that Prodrive cars ran the 34430FE072 part, I'm pretty sure that this is the case.
Does anyone know where to buy the to buy the 344304s000 one
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Old 09-21-2019, 09:26 AM   #578
Scargod
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Originally Posted by Robsyuk View Post
Does anyone know where to buy the to buy the 344304s000 one
You don't need that one. The P/N 34430FG040 for the '08-'15 WRX/STI pump is what you want. It's all discussed a few pages back.
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Old 01-17-2020, 05:20 PM   #579
murfnamedsmurf
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Default SAS scaler to fix over-active VDC

Quote:
Originally Posted by chinyue View Post
I'd like to report that I have created a steering angle sensor proxy and seems to have the VDC issue solved.

I have the 15 STI steering rack installed on my 11 Forester XT (SH9), it was really nice except that VDC kicks in engaging breaks when doing hard turns. The issue persists even you turned the VDC off, so I think this is what gsrcrxsi said that you cannot completely turn VDC off on WRX/FXT.

It's quite annoying so I started looking for solutions and decided to create a device to scale up the steering angle signals. The steering angle for stock SH9 is 580 degrees if you turn the wheel all the way left, and it's 440 degrees for 15 STI steering rack. So I need to scale up around 31%.

I used Arduino Uno with 2 CAN BUS shields, intercepts messages from steering angle sensor, scales the angle up, and forwards. VDC reads messages from steering angle sensor and sends out its own messages (probably for ECU to read) with angle info in it. So I borrowed a Subaru DST-i which can be used to diagnose VDC and read the angle sent by VDC and confirmed that VDC accepts the scaled-up angles. Road test also confirmed that VDC no longer kicks in in those corners it used to.







The same steering angle sensor is used on 08-14 STI/WRX/FXT so I think the SAS proxy approach should work on all these models.

For those who are having ongoing problems and want to create a similar project, I've created a new how-to guide since it seems all the old posts either have broken links, photos, or the host forums no longer exist

https://www.subaruforester.org/threa...rduino.809292/
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Old 01-23-2020, 04:17 PM   #580
Errnsterr
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Default 2015 Steering Rack Issues

Hello,

I've had my steering rack replaced once under warranty & now it looks like it's showing the same similar symptoms once again. Has anyone had this particular issue? TIA!
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Old 03-26-2020, 01:11 PM   #581
Ben
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Hi guys/ gals. Sorry to bring this up, but its about time to give up my 02 WRX wagon and going to looking for a newer model 2013-2014 STi hatchback depends on which one I could find.
Since I have a Q-rack on my 02 WRX, would those Q-rack suitable to the 2014 STi hatchback?
How difficult to swap a 02 WRX Q-rack to 2014?
Thanks for your input.
Ben
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Old 03-26-2020, 01:39 PM   #582
T-37
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I don't think it's possible to install the older rack into the newer subframe, vice versa is possible but I don't think that will work.
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Old 03-26-2020, 02:14 PM   #583
kenliu84
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PrecisionTuned/TiCSuspen.

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Quote:
Originally Posted by Errnsterr View Post
Hello,

I've had my steering rack replaced once under warranty & now it looks like it's showing the same similar symptoms once again. Has anyone had this particular issue? TIA!
Can you clarify what issue you had?

Was it a leak in the valve?

I was recently chatting with a subaru tech who was trying to sell rebuilt 15+ racks. said there was some issues in all pre-2019 racks. They fixed the issue from 2019 and on.
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Old 03-26-2020, 02:15 PM   #584
kenliu84
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PrecisionTuned/TiCSuspen.

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Quote:
Originally Posted by Ben View Post
Hi guys/ gals. Sorry to bring this up, but its about time to give up my 02 WRX wagon and going to looking for a newer model 2013-2014 STi hatchback depends on which one I could find.
Since I have a Q-rack on my 02 WRX, would those Q-rack suitable to the 2014 STi hatchback?
How difficult to swap a 02 WRX Q-rack to 2014?
Thanks for your input.
Ben
Probably best to start your own thread and it's unrelated here. Your own thread's title will capture more attention.
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Old 03-26-2020, 03:47 PM   #585
car_freak85
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Quote:
Originally Posted by kenliu84 View Post
I was recently chatting with a subaru tech who was trying to sell rebuilt 15+ racks. said there was some issues in all pre-2019 racks. They fixed the issue from 2019 and on.
I saw that guy's thread, are his rebuilt racks updated to '19 specs?

What exactly are the problems with this steering rack? (Eyeballing the 2015 rack on my shelf...)
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Old 03-26-2020, 04:00 PM   #586
kenliu84
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Quote:
Originally Posted by car_freak85 View Post
I saw that guy's thread, are his rebuilt racks updated to '19 specs?

What exactly are the problems with this steering rack? (Eyeballing the 2015 rack on my shelf...)
Yeah, I saw that thread and also spoke to him via FB Messenger when I saw him post in one of those FB groups about the same racks. While I like the speed and availability of parts, it's also just a ton of posts that you have to parse through.

He said there's an issue with 'leaks at valve control'. And that they have better parts to fix the issue starting in 2019. Since he's a tech, he has acquired used and new pre-2019 racks and replaced the faulty parts with the upgraded ones.

If you know what parts he's talking about after examining that rack on your shelf, post some pictures.
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Old 03-26-2020, 04:05 PM   #587
Stoni23
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I have an 03 wrx, probably will need a rack soon. The 2015 fits with minor modification right? Believe I've read
something about it in the past.
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Old 03-26-2020, 04:09 PM   #588
kenliu84
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Quote:
Originally Posted by Stoni23 View Post
I have an 03 wrx, probably will need a rack soon. The 2015 fits with minor modification right? Believe I've read
something about it in the past.
Depends if it's a wagon or not. also, the lines connecting to the steering rack will have to be considered.

I'd make sure it's the rack that's causing the issue first. If you don't see any leaks at the rack, then whatever problem you have may be elsewhere. inner tie rods, pump, air leak near the reservoir or pump, etc.
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Old 03-26-2020, 05:58 PM   #589
subaru_gc8
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Quote:
Originally Posted by kenliu84 View Post
Can you clarify what issue you had?

Was it a leak in the valve?

I was recently chatting with a subaru tech who was trying to sell rebuilt 15+ racks. said there was some issues in all pre-2019 racks. They fixed the issue from 2019 and on.
im sure you can. if you can do the other way why couldnt you go backwards. it might take some cutting and stuff but I would think it is possible

Depends if it's a wagon or not. also, the lines connecting to the steering rack will have to be considered.

I have a wagon and was able to up the 2015 rack in my car. th eonly difference is the inner tie rods are alot longer on the sedans, so I used custom ones
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