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Old 05-08-2000, 11:40 AM   #1
Tim Prudence
Scooby Specialist
Member#: 216
Join Date: Aug 1999
Location: san diego, ca USA
Post Custom turbo install w/ Legacy parts

After sitting on the parts for months (turbo, exhaust manifold, crossmember, crossover pipe from a 94 Legacy turbo), I finally got around to having them installed in my MY99 2.5 RS. This was a big job, so I went to ISR subaru ( www.autocaresubaru.com ) for help. I new that it would require lots of exhaust and intake piping fabrication, and seeing some previous work by Ed at ISR, I trusted them to take on this challenge.

In order to use the Legacy turbo exhaust manifold the front crossmember must be replace with a turbo crossmember, because of the different shape of the manifold. Even still the manifold would not bolt up easily. Spacers had to be used between the block and the manifold to prevent the manifold from hitting the lower radiator hose. This hose was wrapped in asbestos to further protect it from heat. After this problem was solved, the manifold still was resting against the water pump and thermostat, which had to be moved out of the way by fabricating a custom bracket.

The IHI turbo I was using was water cooled. So the water had to be plumbed to the turbo, in addition to oil. Because of the high location of the turbo, oil drainage isn't a problem like in the Minnam kit.

The stock airbox was retained, as was the the stock MAF location. This was done to minimize the possibility of losing a MAF. Right after the MAF, the intake assembly is ditched in favor of silicone tubing that runs to the compressor inlet. A small pipe was fabricated that runs from the outlet to the throttle body. A blitz blow off valve was welded to this peice and is venting to the atmosphere. The turbo sits right under where the stock intake piping curves into the throttle body, so the intake piping is very short and sweet.

The exhaust had to be completly fabricated from the turbo back. ISR has a muffler shop they work with and their work came out beatifully as well. 2.5" piping was fabricated from the turbo back, all bends look very clean and smooth. A 2.5" cat was welded in about 6" back from the turbo. So far (with 200 miles), I've had no check engine light.

For fuel controls, I'm just running the stock system with a Paxton fpr (still at stock pressure), and a S-AFC. I have an ITC but haven't even wired it up yet. I'm running between 4-5 psi (stock wastegate setting with my turbo), and I've heard no detonation. Like I said, haven't had the check engine light come on yet. It seems to be going very well, even though I haven't even taken the time to tune.

There's no intercooler (which would have been easy to integrate, but I didn't want to buy one), so I'm going to keep it at 5 psi. Even at those low boost levels, the car runs so much stronger. It feels now like the car has the power it was intended to have. The turbo spools quickly, by 2500 rpms, so boost is always easy to reach. Seems to have helped the top end out immensely, I really can't tell you how happy I am with the improvement, AT ONLY 5 PSI!

ISR did a great job with the install. Everything is very clean and well done. This looks like a factory job, real low-profile and professional. I'd have to recommend them to anyone in the Southern California area. And from what I hear, they may be coming out with a turbo kit soon too, so keep a look out, they really know what they are doing.

ISR also installed my ACT clutch at the same time. I love the new clutch! I love it! It's so much nicer than the stock clutch, pedal effort is more, but not by much. Now more shuttering, and it clamps strong and smoothly. I think I drive more smoothly with the ACT than the factory clutch.
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Old 05-08-2000, 02:08 PM   #2
Scooby Specialist
Member#: 80
Join Date: Jul 1999

That sounds pretty cool - would you mind roughly telling us how much the whole setup cost, installation not included?

I'm currently collecting parts for my turbo install too, so I'm curious to see how I compare.

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Old 05-08-2000, 02:21 PM   #3
Scooby Newbie
Member#: 19
Join Date: Jun 1999
Location: Dallas, TX

I have the same basic setup + some extras. Here is the rundown of my parts prices:

Legacy Turbo, headers, up pipe, down pipe : $700
Custom Top-mount Spearco I/C : $700
Greddy BOV Type-S : $200
Intake pipe, charge pipe, and exhaust : ~$500 (unsure because was included with labor price)
Weapon *R FPR : $150
RX7 TT Fuel Pump : $50

Apex'i ITC : $300
J&S Safegaurd (and dual monitor) : $550
Field SFC Hyper-R : $300
Greddy Turbo Timer : $100
Greddy Profec-B EBC (with remote) : $350
Greddy Boost Meter : $140
Greddy EGT Meter : $160
Greddy Fuel Pressure Meter : $160

Total cost:$4350


[This message has been edited by SKiDaZZLe (edited May 08, 2000).]
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Old 05-08-2000, 03:32 PM   #4
Tim Prudence
Scooby Specialist
Member#: 216
Join Date: Aug 1999
Location: san diego, ca USA

Mine was less than that (because of less stuff):

Legacy turbo parts (manifold, up-pipe, turbo): $500
Crossmember: $125
S-AFC: $285
Paxton rising rate fpr: $200
Blitz bov: $160
Gaskets, spacers, fabricated intake, hoses: $300
Custom exhaust (with cat): $450

So that's about 2 grand, plus the install cost, my clutch, other stuff like the ITC (that I'm not using yet), boost guage, other guages you might want...
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Old 05-08-2000, 04:51 PM   #5
Scooby Specialist
Member#: 80
Join Date: Jul 1999

Thanks for the info guys. I really appreciate it. We should compare notes once I get my setup up and running. It will have to wait a couple of weeks though until I get my turbocharger unit.

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Old 05-08-2000, 10:54 PM   #6
Tarmac RS
Scooby Newbie
Member#: 1020
Join Date: Mar 2000
Location: Russia with Love

what year cars did you guys do this to?
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Old 05-08-2000, 11:09 PM   #7
Scooby Newbie
Member#: 423
Join Date: Oct 1999
Chapter/Region: E. Canada
Location: Markham, Ont , Canada
2002 WRX wagon


HI, as long as I drive my Legacy turbo, could you tell me where do you put the BOV on to the engine? Since the engine have the OEM BOV! Does the BOV sound good? I would like to put it on my car but someone told me that may cost the engine run rich and the idel will go up and down, isn't it true?
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Old 05-08-2000, 11:14 PM   #8
Scooby Newbie
Member#: 667
Join Date: Dec 1999
Chapter/Region: SCIC
Location: Los Angeles, CA
2013 Impreza WRX 5D
Plasma Blue Pearl


Turbo $35 (T3 from Jyard, works OK)
Wastegate $100 (used)
Blow off $200
Intake & Exhaust Piping D.I.Y., maybe $100
Spearco Intercooler $500
Haltech A/F meter $50 (used)
VDO boost gauge $15 (used)
WRX fuel pump $200 (I think, been a couple years)
A'pex super AFC $300
Greddy Profec B boost controller $325
Vortech Fuel pressure riser $150
Miscellaneous $50-100

I basically paid about 2000 for all my turbo stuff, just hit the recycler tuning parts galore. I don't even have the AFC or boost controller yet. Those are coming in the next 2 weeks.

Arik Kadosh
98 Impreza Turbo (EJ22G)
SPD and Renner tuned

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Old 05-09-2000, 06:29 AM   #9
HRE | giulio
Former Vendor
Member#: 481
Join Date: Nov 1999
Location: NY USA

Why dont you guys make more turbo kits and sell em? I'm sure someone would buy it!
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