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Old 08-04-2019, 04:23 AM   #1
afif
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Join Date: Mar 2017
Chapter/Region: E. Canada
Location: Canada
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2011 WRX STI
Dark Grey Metallic

Default First post, would like some guidance on modding the right way.

Hi everyone,

I drive a 2011 STI, so far the car has been great and has been even better with the modifications installed. I drove the car for a year before deciding to modify it since I wanted to get used to handling an AWD rally car. The mods are a dp, catback, cai, and a bov. The car is around 265 WHP, I think that's a conservative tune. I would like more power (don't we all?), I do want to do this right however.

Decided to read the forums for a couple of weeks and essentially what I got out of the forums is that I shouldn't slap on a bigger turbo, various power mods and call it a day.

I think focusing on engine internals for now would be a good idea. I've been considering getting a set of Wiseco Pistons and Manley Performance Forged Connecting Rods. After which, I would get a better turbo such as a FP Green HTZ, a turbo inlet, and a Tomei ULH w/ up pipe.

Would this be a good path? In case it matters, the eventual goal would be around 330 WHP, with a lot more room to grow if I decide I want more power in the future.

Sorry for any ignorance, new to modifying cars. Thanks for any advice.
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Old 08-04-2019, 09:57 AM   #2
Scorpius
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Member#: 370806
Join Date: Oct 2013
Location: Northern Indiana
Vehicle:
2019 WRX/STI DGM
2016 WRX/STI ISM

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Talk to a Subaru engine builder, tell him your goals, and do exactly as he says. Oh, and get rid of the intake.
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Old 08-07-2019, 03:11 PM   #3
bdubblu
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Join Date: Jul 2010
Chapter/Region: MAIC
Location: Mostly at my home
Vehicle:
2004 WRX Wagon
Stage 5.1.2a.2

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Quote:
Originally Posted by afif View Post
I think focusing on engine internals for now would be a good idea. I've been considering getting a set of Wiseco Pistons and Manley Performance Forged Connecting Rods. After which, I would get a better turbo such as a FP Green HTZ, a turbo inlet, and a Tomei ULH w/ up pipe.

Would this be a good path? In case it matters, the eventual goal would be around 330 WHP, with a lot more room to grow if I decide I want more power in the future.
NOPE. Your stock internals can handle your goals. Why would you build the motor before actually needing to? When the time comes to go above and beyond the stock internals capabilities, THEN you pull the motor and build it. All other mods are just peripherals and don't require the motor to come out of the car.
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Old 08-07-2019, 03:51 PM   #4
Jack
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(From General)

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Make an excel spread sheet of all the parts you're talking about. Talk with an engine builder. Talk with a tuner. Add the parts they both recommend. Have a column for price. Add the kbb trade value for your car stock. Total the prices (including labor that you'll have to pay). Understand that you can very easily hit a new base model leftover GT-R with what you're planning. If you're ok with that, play on.
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Old 08-08-2019, 10:38 AM   #5
kayfunlite
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2008 STI

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My 08 STI is right at 340whp/350wtq on Dynojet, 300whp/315wtq on Mustang dyno. I am on stock vf48 turbo with e85 flex fuel tune. I bought the car with blown motor so I sourced a shortblock with forged pistons and rods, then took it to P&L Motorsport (which was a mistake, doing it again I would not source the motor myself because I ended up using a notoriously bad builder). The advice I received from P&L Motorsport was to get Killer B oil pickup tube & oil baffle windage tray, ARP head studs, P&L air pump block off plate, P&L stainless steel AVCS line kit (recommended for ringland failure), and IAG air oil separator. I have since added a Tomei turbo inlet and TGV deletes. This was all before going flex fuel. From my experience, brand matters so don't go buying a Grimmspeed AOS instead. Hope it helps, I am no expert, and I've certainly spent more money than most do to get to my power levels.

Last edited by kayfunlite; 08-08-2019 at 10:53 AM. Reason: redundancy
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Old 08-08-2019, 11:49 AM   #6
subaru_gc8
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Location: Orange County CA
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silver

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Quote:
Originally Posted by afif View Post
Hi everyone,

I drive a 2011 STI, so far the car has been great and has been even better with the modifications installed. I drove the car for a year before deciding to modify it since I wanted to get used to handling an AWD rally car. The mods are a dp, catback, cai, and a bov. The car is around 265 WHP, I think that's a conservative tune. I would like more power (don't we all?), I do want to do this right however.

Decided to read the forums for a couple of weeks and essentially what I got out of the forums is that I shouldn't slap on a bigger turbo, various power mods and call it a day.

I think focusing on engine internals for now would be a good idea. I've been considering getting a set of Wiseco Pistons and Manley Performance Forged Connecting Rods. After which, I would get a better turbo such as a FP Green HTZ, a turbo inlet, and a Tomei ULH w/ up pipe.

Would this be a good path? In case it matters, the eventual goal would be around 330 WHP, with a lot more room to grow if I decide I want more power in the future.

Sorry for any ignorance, new to modifying cars. Thanks for any advice.
the best way is to figure out what you want to do with the car. the biggest problem with just going with a built engine or a bigger turbo is you have to drive it differently than if you had a smaller turbo, weather it be a fp green or a 30r, you will not start to spool any earlier than 300 which means that your low end is going to suffer greatly, so my suggestion is to figure out where you want the power band to be and fist go off that.
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Old 08-08-2019, 11:53 AM   #7
Waddlz
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2012 STi
SWP

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The only way I'd mod this car is if you can do the work yourself, and save the money on labor.

Its your money, you spend it how you feel.

but if you want to get in this game, realize you need deep pockets and lots of time.

If you just want a fast car, do what Jack said and buy a stock "fast" car.

With that said, I second bdubblu and say your stock internals will be fine for that power number.

There is no "right way" to mod. each of us has our own goals/desires with this platform. Some like drag racing, some like Auto-x or road racing. Others just want to go street race Friday nights or drive to work comfortably.

First figure out what you want to do with the car. Then you can plan mods accordingly.
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Old 08-08-2019, 12:24 PM   #8
kayfunlite
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Correct me if I'm wrong, but even if you want stock power levels it would be beneficial to put an air oil separator and get a pro tune at minimum?
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Old 08-13-2019, 02:59 PM   #9
kingsalami
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2009 WRX 5-door
White

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Quote:
Originally Posted by kayfunlite View Post
Correct me if I'm wrong, but even if you want stock power levels it would be beneficial to put an air oil separator and get a pro tune at minimum?
Yep. Or a high quality oil catch can. It performs the same function as the AOS, but it's generally cheaper and allows you to monitor oil blowby quantity.
For an unmodified engine, a pro tune isn't a great idea (IMO) due to the power-to-expense ratio. An e-tune from Torqued Performance is a much better bang for your buck @ stock power levels.
I wouldn't consider a pro tune unless I was swapping to an aftermarket downpipe - the increase in power justifies the extra expense of a pro tune.

Last edited by kingsalami; 08-13-2019 at 03:06 PM.
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Old 08-13-2019, 04:00 PM   #10
Gallo2011
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Church!

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Fueling. With the hard parts you currently have installed, you're pretty close to the limit of the stock fuel pump and injectors. You'll definitely need them if you do go to a bigger turbo, etc.
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Old 08-14-2019, 12:25 AM   #11
bdubblu
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Location: Mostly at my home
Vehicle:
2004 WRX Wagon
Stage 5.1.2a.2

Default First post, would like some guidance on modding the right way.

You certainly donít need a CAI. Stock airbox supports up to 400hp. Iíve heard even a tuner say no CAI. Just a short ram with a higher flowing filter.
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Old 08-16-2019, 09:17 AM   #12
aecolts
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Default

Can the sri cause alot of problems?
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