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Old 06-22-2014, 04:07 PM   #1
djdawson2
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Default General engine upgrade advice

Hi,

Car is a 2005 Sti with 35k miles on it. It is bone stock at this time. What I'm looking for is advice on those "proven" sort of formula approach engine upgrades.

I intend to use a 3071 Garrett with external WG... I've got several of these turbos laying around from various Audi projects and love the power vs. boost threshold of the 3071 size turbo.

If there is a "kit" approach that is common, that's what I'm interested in... you tell me (please)... use this uppipe, this downpipe, this header (?) this FMIC, these injectors, this fuel pump, this tuning package... etc. I hope this makes sense. I've been building engines for decades, but this is my first Subaru, so I'm looking for a little jump start on ideas as I've not learned my way around what's out there yet, good and bad.

I figure with a 3071, I should be able to make 350ish at the wheels, which is where I'd like to be.

Thanks,
Dave
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Old 06-23-2014, 11:56 AM   #2
wgr73
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Quote:
Originally Posted by djdawson2 View Post
Hi,

Car is a 2005 Sti with 35k miles on it. It is bone stock at this time. What I'm looking for is advice on those "proven" sort of formula approach engine upgrades.

I intend to use a 3071 Garrett with external WG... I've got several of these turbos laying around from various Audi projects and love the power vs. boost threshold of the 3071 size turbo.

If there is a "kit" approach that is common, that's what I'm interested in... you tell me (please)... use this uppipe, this downpipe, this header (?) this FMIC, these injectors, this fuel pump, this tuning package... etc. I hope this makes sense. I've been building engines for decades, but this is my first Subaru, so I'm looking for a little jump start on ideas as I've not learned my way around what's out there yet, good and bad.

I figure with a 3071, I should be able to make 350ish at the wheels, which is where I'd like to be.

Thanks,
Dave
Aeromotive fuel pump, ID1000cc injectors (top feed). You can find the other downpipes and upipes. There are so many options. Grimmspeed for the uppipe and EWG kit...


Also depends on the fuel you want to run. If you want 350whp, you can make that with the stock turbo on E85. All you would need is injectors, and fuel pump, an intake (possibly not), and a downpipe.

Last edited by wgr73; 06-23-2014 at 02:02 PM. Reason: Removed SB
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Old 06-23-2014, 01:16 PM   #3
djdawson2
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Default

Well, I wasn't planning on building a short block. I was thinking 350whp could be achieved on stock internals. Am I wrong?

This is a daily driver car... so I'm not messing around with E85 or the like. I'm just going to pump in 91 octane and drive it.

In other words, I'm just looking for the best "bolt on" options to get me in that ballpark using a 3071 hairdryer.

Thanks!
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Old 06-23-2014, 02:04 PM   #4
wgr73
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You are correct, I removed that. Everything I posted would work. Intake is needed as well, probably a turbo inlet.

There are a lot of ways to accomplish what you want, as its not very hard to do. I'd just read and read and read.
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Old 06-24-2014, 04:03 AM   #5
some dude
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Proven power bragging section will have what power they made, and their specific mod list.
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Old 06-24-2014, 04:20 AM   #6
haitisubaru
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to tell you the truth bro ive been doing this for 8 years and if your on a budget buy 3 things ecu reprogramer lots of options there uprgaded tmic nos kit .
now thats for a really agressive person
or you can x off the noss get bigger injectors,pump,tune it well with the turbo your putting and upgrade exhaust up/down/headers thats pretty much what you will need I(if you want to go cheaper on the exhaust buy a qtp off ebay put it right after the turbo and voila . when i went to dyno my car after doing just that had a 13hp gain but a ****t iddle with raw gas smell .
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Old 06-24-2014, 09:19 AM   #7
Razgeiz
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I'd be careful on stock internals @350 on 91 octane. 91 isnt very knock resistant and knock will blow the ring lands in short order. If this is your plan get a ets, Grimmspeed or process west tmic along with injectors pump exhaust and an EXCELLENT tune. Intake not needed if you run stock location, if you run rotated then you will need it.

One question why so against e85?
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Old 06-24-2014, 01:23 PM   #8
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Quote:
Originally Posted by Razgeiz View Post
I'd be careful on stock internals @350 on 91 octane. 91 isnt very knock resistant and knock will blow the ring lands in short order. If this is your plan get a ets, Grimmspeed or process west tmic along with injectors pump exhaust and an EXCELLENT tune. Intake not needed if you run stock location, if you run rotated then you will need it.

One question why so against e85?
I agree. If you're in an area with only 91,chances are it's very ****ty quality. I was in California for awhile and their 91 (along with the surrounding states) is so bad that Cobb had to create a special AP map just for that area. The reason behind this is that the area has banned some of the key octane boosters in gas (as far as I know). I would see how available e85 is. If you really have to use 91 I wouldn't go past 330ish, and I'd be asking the tuner for a conservative tune. 91 is no fun, I feel for you.
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Old 06-24-2014, 11:53 PM   #9
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Quote:
Originally Posted by Trae32566 View Post

I agree. If you're in an area with only 91,chances are it's very ****ty quality. I was in California for awhile and their 91 (along with the surrounding states) is so bad that Cobb had to create a special AP map just for that area. The reason behind this is that the area has banned some of the key octane boosters in gas (as far as I know). I would see how available e85 is. If you really have to use 91 I wouldn't go past 330ish, and I'd be asking the tuner for a conservative tune. 91 is no fun, I feel for you.
Oh California gas, how much I hate you. Even worse is the "winter blend"
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Old 06-25-2014, 10:57 AM   #10
Trae32566
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Originally Posted by jeffk182 View Post

Oh California gas, how much I hate you. Even worse is the "winter blend"
Oh god yes, please don't remind me.
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Old 06-25-2014, 01:51 PM   #11
wgr73
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Quote:
Originally Posted by jeffk182 View Post
Oh California gas, how much I hate you. Even worse is the "winter blend"
Quote:
Originally Posted by Trae32566 View Post
Oh god yes, please don't remind me.
There's a winter blend? lol...wow. Sounds like E85 minus every single benefit possible
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Old 06-25-2014, 02:18 PM   #12
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For 350whp you will have to dump some cash for rotated turbo setup. IMO its overkill and waste for that power. Any 20G is a good bolt-on for 400whp, billet options available now too.

For that power level...
FUEL: DW850cc or ID1000 injectors with walbro 255lph pump in-tank and done.

EXHAUST: Get whatever matches your setup requirements, don't overthink this section. Its friggin pipe! Normal aftermarket 3" turboback exhaust is good, do NOT get the big tubing headers unless you plan on going really big turbo.

BOOST PIPES: Pick your flavor, a good TMIC is plenty for that turbo. Easier install than front mount but I ditched mine for a Perrin FMIC due to turning my own wrenches. After fighting with my tmics for a decade it got old. Spearco offers a quality TMIC for a price. I think grimmspeed makes a quality piece now too, their prices are usually awesome.

INTAKE: Leave the manifold and throttle body alone. TGV deletes will help some, only recommended if you have to pull the manifold anyways, PITA job. Pre-turbo intake, need more details on if you are going rotated or not. Then, what kit if you go rotated and what size inlet does your turbo have.

ECU: Find a local tuner FIRST! Ask questions and consider that tuner's abilities and limitations. I personally run opensource, retuned factory ECU without a hand-held programmer. Cobb Accessport is a proven programmer but requires tuner to have a license for custom tuning.
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Old 06-25-2014, 02:23 PM   #13
Dr. octagon
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Quote:
Originally Posted by djdawson2 View Post
Hi,

Car is a 2005 Sti with 35k miles on it. It is bone stock at this time. What I'm looking for is advice on those "proven" sort of formula approach engine upgrades.

I intend to use a 3071 Garrett with external WG... I've got several of these turbos laying around from various Audi projects and love the power vs. boost threshold of the 3071 size turbo.

If there is a "kit" approach that is common, that's what I'm interested in... you tell me (please)... use this uppipe, this downpipe, this header (?) this FMIC, these injectors, this fuel pump, this tuning package... etc. I hope this makes sense. I've been building engines for decades, but this is my first Subaru, so I'm looking for a little jump start on ideas as I've not learned my way around what's out there yet, good and bad.

I figure with a 3071, I should be able to make 350ish at the wheels, which is where I'd like to be.

Thanks,
Dave
#1. The approach to gearing/modifying a EJ22T,EJ207T,EJ205T/Ej257T is the same as it has been since 2002. Nothing has changed......not sure what we all have been talking about since 2002 within all these forums.

#2. How do you plan on running a 3071 flanged for audi up pipe on a Ej257? Would it not be the same amount of money converting it to T3 flange?

#3. There is no go to kit.........if that was the case we would all be using the same thing, fortunately enough we have many options. You need to search

#4. I would strongly suggest researching what has worked, what has failed, who ****ed up and why.

#5. That 3071 I imagine will have its differences seeing that audi platform and Subaru platform is apples to oranges.
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Old 06-25-2014, 05:32 PM   #14
A7x411
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Sell the 3071, buy a 20g, dw850, walbro 255 fuel pump, full 3 inch catless turbo back exhaust. Get an intake if you want. Get a turbo inlet if you want or if yours is ripped. Get a good conservative tune for at least 93oct and I guarantee if your tuner knows how to tune that will put you right around 350. Possibly into 360hp range. My buddy has that exact setup on his 07 and is making 368 on a conservative 93 tune.
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Old 06-26-2014, 08:54 AM   #15
Dr. octagon
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If you have "spare" 3071's laying around it makes no sense to sell it.......run what you got.

Skip all that extra turbo inlet, intake ****.

Rotate that turbo in T3 fashion.

If you know what you are doing, this route should cost next to nothing.


You need to research more
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