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Old 09-06-2000, 11:50 AM   #1
Kyle Paton
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Member#: 1184
Join Date: Mar 2000
Chapter/Region: South East
Location: Brooksville, FL
Vehicle:
2012 Impreza
Dark Grey Metallic

Post ATTN: Tim Prudence


Hey Tim,

I just got a job working for Subaru and I'm thinking of going the same route as you (using Turbo Legacy parts) since I can get them for cost.

If you could give me any info or advice I would appreciate it

Thanks
Kyle
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Old 09-06-2000, 12:12 PM   #2
Tim Prudence
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Member#: 216
Join Date: Aug 1999
Location: san diego, ca USA
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Overall, I think it's a good idea and can save you a lot of $$$ compared to the kits that are out there. The install is pretty straightfoward, there are few thing that need to be worked out (you'll need to move a few things around in the engine bay, thermostat/water pump, some other things I forget right now). The headers bolt right on, but on mine at least, I need to get some spacers to get everything to bolt up perfectly. Make sure you shield the radiator hose that runs above the driver side header otherwise you'll melt right through it. You will need an exhaust section fabricated between the turbo downpipe and your cat back section (I just had everything fabricated from the turbo back).

Between all this and working out the oil and water plumbing to the turbo, it takes quite awhile. Plan on not using your car for a week just to be safe.

Make sure that you find a good intercooler that you can use before you start. I used MY96 WRX intercooler, and it fits quite nicely. In fact the piping that comes with this intercooler can be used to almost perfectly connect to the turbo outlet (only required a 4 inch peice of hose to secure). But if you need piping fabricated, that will be extra time and money. So try to plan everything as thoroughly as possible.

It's a fast setup, though not Minnam stage II fast. This is mainly because the turbo can't keep up with the engine at higher rpms. Right now I get about 7 psi of boost in gears 2-4 under 5000 rpms, once I get past 5000 boost starts to drop until it's 5 psi at redline. 5th gear is the same story except I get 8 psi at lower rpms and it drops down to 6. Right now, this doesn't bother me too much, but once my car is in a better state of tune, to where I think it could handle more boost, I think that I will want to rectify this.

Rather than go through the headaches of trying to find a bigger turbo (like one of the WRX units) and try to swap that in and hope everything hooks up properly, I think that I'm just going to send it away to turbonetics and have it rebuilt with a bigger compressor and maybe a ball bearing center section. Keep this in mind before you start, maybe you'll want to start with a different turbo, instead of getting everything running and then find out once you up the boost.
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Old 09-06-2000, 12:16 PM   #3
Tim Prudence
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Member#: 216
Join Date: Aug 1999
Location: san diego, ca USA
Post

Since you are working for Subaru now, if you can think of any good solutions for my turbo problem you could let me know. It'd be nice know how the IHI unit from the Legacy compares the new one that's coming with MY02.
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Old 09-06-2000, 02:48 PM   #4
SubieFL
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2000 Impreza 2.5 RS
Silver

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Old 09-06-2000, 03:12 PM   #5
Sunrise City Rider
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Join Date: May 2000
Chapter/Region: South East
Location: Sunrise, FL, USA
Vehicle:
2000 Impreza W"RS"X
Blue Ridge Pearl

Post

Tim, you are very wise to use the same housing and just switch out the internals of the stock Legacy turbo. This will increase boost while maintaining the velocity of air or will probably make the air travel faster, which means no lag. Mas boost will probably come on faster than a supercharger, making the transmission work even harder. Just always keep this in mind, whenever you double stock power on our Subies. I always think of my poor tranny everytime my foot hits the floor.
Zee
MY00 BRP
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Old 09-06-2000, 03:28 PM   #6
Tim Prudence
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Member#: 216
Join Date: Aug 1999
Location: san diego, ca USA
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Yeah... I know...

Turbo lag is not a concern at all with these units, even when cruising at low rpms. That's why I wouldn't mind switching to a larger housing if I was completely sure that it would bolt up to my exhaust piping (but I haven't found anything I could be sure of). These turbos spool fast on our engines, mine goes from vacuum to 7 psi in less than a second at 3000 rpms.

[This message has been edited by Tim Prudence (edited September 06, 2000).]
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