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Old 03-10-2021, 07:08 PM   #1
Scooby Newbie
Member#: 383471
Join Date: Mar 2014
Chapter/Region: NWIC
Location: PNW
2005 Legacy GT
Arctic White Pearl

Default What's a good build recomendation?

I've got a LGT 05 being built up at a performance shop (It's built to hold serious power so the motor will be fine for whatever I throw at it).

What would be a good turbo/injectors/etc build that would still be a decent streetable driver with my 5EAT?

I was watching a video of a 400hp but it had such big turbo lag; I don't want to deal with massive turbo lag. AND, I'd like to do an STI 6 speed swap but it's not in the budget yet.

I've driven turbos but this is new territory building one myself...
I'd like to copy someone else's setup without ending up with an expensive pile of unused parts when I'm done.
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Last edited by oicurhere2; 03-12-2021 at 04:38 AM.
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Old 03-22-2021, 11:51 PM   #2
Scooby Newbie
Member#: 522840
Join Date: Mar 2021
Location: California

I dont know what the torque converter can handle on that tranny.
The stock turbo, injectors, etc are good enough to deliver plenty of power if this is a daily driven vehicle.
or is it a track car? Do you have some sort of goal in mind?

You can copy most my set up...
I had an '05 LGT before. Owned it for about 8 years, sold it a few years back. Protuned the whole time.
Drove the thing hard, and its still running for its current owner!
Mine was a manual 5spd though.

Stock turbo and injectors. It was protuned stage 2.
all invidia exhaust; up pipe, downpipe, Q300. Totally catless.
AVO top mount intercooler, GFB bypass valve. Manual boost controller.
...and i think that was about it for power stuff. Also had clutch and flywheel, brakes, some suspension work, wheels, boost gauge, Cobb Accessport, etc, etc.
but stock engine with just bolting on that bit and a tune it, ...if i recall correctly made:
287 horsepower and 330-something torque on about 18psi boost, with a conservative tune. Might not sound like much, but it was a rocket ship, and reliable.
Even with 235 wide tires (the fattest tires i could fit under it) had to be really careful with wheel spin in the wet.

If I was doing it again, I wouldnt go catless with the downpipe. It made a lot of fumes.
Some passengers with sensitive noses would occasionally complain.
The car had tons of power down low, it could really get out of the hole and picked up explosively from a roll at lower speeds, really good to drive around with, seemed like it always had power on tap whenever you wanted it. no boost lag. From a higher speed roll it didnt pull super strong but it was no slouch. I woulnt go for a bigger turbo unless youre doing driving where you need to go from 60mph to 160mph really fast.

The GFB bypass valve was unnecessary purchase, the stock wouldve been just fine. you'll want to keep it recirculating too (i did) the manual boost controller was recommended by my tuner, but probably couldve done without that as well too if you want to save a few bucks and skip those items.
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Old 03-24-2021, 03:47 PM   #3
Max Capacity
Scooby Specialist
Member#: 149347
Join Date: May 2007
Chapter/Region: NESIC
Location: Tolland, CT
05 LGT ,09 SpecB


The answer to all your questions should be over here, https://legacygt.com/forums/forumdis...5-2009-10.html

Look around that forum and ask there.
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