Welcome to the North American Subaru Impreza Owners Club Tuesday March 19, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC General > Newbies & FAQs

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 06-08-2020, 02:57 PM   #1551
subaru_gc8
Scooby Specialist
 
Member#: 29292
Join Date: Nov 2002
Chapter/Region: SCIC
Location: Orange County CA
Vehicle:
2004 WRX wagon
silver

Default

you can get an off the self ma from cobb, just make sure you dont put on more than what they said.. as for blowing up, there are no gaurantees at all
* Registered users of the site do not see these ads.
subaru_gc8 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 06-08-2020, 03:03 PM   #1552
Tickering Dad
Scooby Newbie
 
Member#: 515433
Join Date: Jun 2020
Default

Well I am schedule for a pro tune in Dallas Tx next month would it be safe to put everything on and just take it easy on the car until I drive it down there? All I have on right now is the CB and cold air with stage 1 map. car makes 18psi drives great I just love the way the DP makes it sound. My up pipe is in just not sure if I should put it on.
Tickering Dad is offline   Reply With Quote
Old 06-08-2020, 03:05 PM   #1553
Tickering Dad
Scooby Newbie
 
Member#: 515433
Join Date: Jun 2020
Default

People have been telling me running the cattless down pipe will blow the motor.
Tickering Dad is offline   Reply With Quote
Old 06-21-2020, 04:30 PM   #1554
Numbah1
Scooby Newbie
 
Member#: 515794
Join Date: Jun 2020
Default

Yah, i just want 325whp lol my 385whp g8 would feel boring with that fast of a bugeye
Numbah1 is offline   Reply With Quote
Old 07-30-2020, 10:26 PM   #1555
catz4dave
Scooby Newbie
 
Member#: 476565
Join Date: Oct 2017
Location: Portland
Vehicle:
2000 RSTI
74F

Default

Quote:
Originally Posted by Sti_Guyy60 View Post
Just from my experience, you need to have the bottom end built if you want a reliable build. These cars just aren't made for high horsepower on a stock longblock. Beware.....


Stock longblock will always be more reliable than a built engine though so it’s a trade off; imo a stand-alone ecu should be the first thing you buy if you want reliability
catz4dave is offline   Reply With Quote
Old 08-17-2020, 10:07 AM   #1556
joshua802
Scooby Newbie
 
Member#: 517602
Join Date: Aug 2020
Default Hell Yeah!

Lets just hope Subaru makes the next gens a little more powerful so we can just drive them...
joshua802 is offline   Reply With Quote
Old 09-24-2020, 03:56 PM   #1557
AYOUNGBLOOD
Scooby Newbie
 
Member#: 518875
Join Date: Sep 2020
Default

Well put.
AYOUNGBLOOD is offline   Reply With Quote
Old 11-16-2020, 10:42 AM   #1558
HawkeyeGuy98
Scooby Newbie
 
Member#: 519334
Join Date: Oct 2020
Default

Great FAQ, alot of useful information and advice.
HawkeyeGuy98 is offline   Reply With Quote
Old 12-05-2020, 06:34 PM   #1559
Upnorthv7sti
Scooby Newbie
 
Member#: 520762
Join Date: Dec 2020
Default

Lots to consider!
Upnorthv7sti is offline   Reply With Quote
Old 01-03-2021, 10:25 PM   #1560
savagesoob
Scooby Newbie
 
Member#: 521085
Join Date: Dec 2020
Location: Florida
Vehicle:
2015 STI

Default

I feel personally attacked.

Great post. I think I'll shoot for 380whp
savagesoob is offline   Reply With Quote
Old 02-08-2021, 10:29 AM   #1561
Timcox105
Scooby Newbie
 
Member#: 522227
Join Date: Feb 2021
Default

great post lots of info to those new
Timcox105 is offline   Reply With Quote
Old 03-13-2021, 05:21 PM   #1562
Bzerm01
Scooby Newbie
 
Member#: 522960
Join Date: Mar 2021
Default

Good info for sure
Bzerm01 is offline   Reply With Quote
Old 05-06-2021, 02:46 AM   #1563
ahGer
Scooby Newbie
 
Member#: 524129
Join Date: May 2021
Default lol

pretty cool
ahGer is offline   Reply With Quote
Old 05-09-2021, 02:57 PM   #1564
Erik5oh
Scooby Newbie
 
Member#: 341205
Join Date: Dec 2012
Location: Hudson, MA
Vehicle:
2002 WRX Sedan
Blue

Default

Wow, I really should have read this before I posted my idiot question to my Facebook group. And I only want maybe 300HP out of my 2.0L.
Erik5oh is offline   Reply With Quote
Old 05-24-2021, 10:50 AM   #1565
Justablueru
Scooby Newbie
 
Member#: 524424
Join Date: May 2021
Default

I just bought my first Subaru and when I got in touch with my local tuner and told him the build list the previous owner had he said that's a 400whp car easy, it really sounds unlike any Subaru I've ever heard
Justablueru is offline   Reply With Quote
Old 07-08-2021, 10:01 AM   #1566
AnjaBrown
*** Banned ***
 
Member#: 525409
Join Date: Jul 2021
Location: Norlina, NC 27563
Default

400whp is kinda normal and not too much for Impresa by the way
AnjaBrown is offline   Reply With Quote
Old 07-15-2021, 12:23 PM   #1567
ericsson
Scooby Specialist
 
Member#: 208672
Join Date: Apr 2009
Chapter/Region: TXIC
Location: Houston, TX
Vehicle:
2013 WRX STI Limited
Obsidian Black

Default

Quote:
Originally Posted by AnjaBrown View Post
400whp is kinda normal and not too much for Impresa by the way



My thoughts exactly!! My STI is FINALLY no longer slow @ 403 whp, but it isn't fast either
ericsson is offline   Reply With Quote
Old 12-31-2021, 03:47 PM   #1568
Todd914
Scooby Newbie
 
Member#: 528129
Join Date: Dec 2021
Default

Good write up. Thanks
Todd914 is offline   Reply With Quote
Old 03-08-2022, 02:26 PM   #1569
patriot325
Scooby Newbie
 
Member#: 529160
Join Date: Mar 2022
Location: PA
Vehicle:
2011 Impreza WRX
Black

Default

Quote:
Originally Posted by Chino Bling View Post
very nice write up.
i get so sick and tired of hearing people say "my goal is 400+ whp." what does anyone really need that much power on the street? my goal is to have a fun car to drive. and i'd say my car is a lot of fun to drive, and i dont make anywhere near 400whp.
Agreed. I've driven a lot of beater cars and some nice cars. I've had the pleasure of having a 2011 WRX for 10 years. I've taken some professional driving instruction (not racing) and that professional instruction increased the fun more than any HP could. I've been hard pressed to find a car that is more fun for the money.
patriot325 is offline   Reply With Quote
Old 03-08-2022, 02:48 PM   #1570
pearljam11
Scooby Specialist
 
Member#: 113335
Join Date: Apr 2006
Location: Downingtown, Pa
Vehicle:
2020 WRX Limited DGM
2005 STi OBP

Default

Quote:
Originally Posted by patriot325 View Post
Agreed. I've driven a lot of beater cars and some nice cars. I've had the pleasure of having a 2011 WRX for 10 years. I've taken some professional driving instruction (not racing) and that professional instruction increased the fun more than any HP could. I've been hard pressed to find a car that is more fun for the money.
An old saying goes "It's more fun to drive a "slow" car fast than a fast car slow"

my brz was the most fun car to drive I've owned but it was absolutely the slowest
pearljam11 is offline   Reply With Quote
Old 04-08-2022, 01:51 PM   #1571
atomicmecha
Scooby Newbie
 
Member#: 371012
Join Date: Oct 2013
Chapter/Region: MAIC
Location: Martinsburg, WV
Vehicle:
2007 WRX STi
Blue

Default

reading through this from 07 till now is a ride. haha.

just wanted toss my 2 cents in. 400whp is a lot of fun as a daily for the right kind of driver. I'm a speed freak so more power is normally my answer to everything. I was worried how my STi would handle on my 65 mile each way commute to work and back. Turns out it was actually not much different from when it was stock or when it was stage 2. Under normal traffic driving it handles the same as before. Boost doesn't come in till 3k and up so it just putters around like an N/A car in beltway traffic. Now the last half of my drive is nothing but 70mph speed limit highways and then I'm happy I have that extra ump. Overall I'm glad I did it. Now I'm adding flex fuel to have more fun on the weekends.

Guess the tldr advise I can give to anyone wanting 400whp is, do it if you aren't a bitch. If you default to complaining about lag, or heavy clutch, or anything like that. Keep it stock or under stage 2 and be happy.
atomicmecha is offline   Reply With Quote
Old 04-08-2022, 01:51 PM   #1572
atomicmecha
Scooby Newbie
 
Member#: 371012
Join Date: Oct 2013
Chapter/Region: MAIC
Location: Martinsburg, WV
Vehicle:
2007 WRX STi
Blue

Default

reading through this from 07 till now is a ride. haha.

just wanted toss my 2 cents in. 400whp is a lot of fun as a daily for the right kind of driver. I'm a speed freak so more power is normally my answer to everything. I was worried how my STi would handle on my 65 mile each way commute to work and back. Turns out it was actually not much different from when it was stock or when it was stage 2. Under normal traffic driving it handles the same as before. Boost doesn't come in till 3k and up so it just putters around like an N/A car in beltway traffic. Now the last half of my drive is nothing but 70mph speed limit highways and then I'm happy I have that extra ump. Overall I'm glad I did it. Now I'm adding flex fuel to have more fun on the weekends.

Guess the tldr advise I can give to anyone wanting 400whp is, do it if you aren't a bitch. If you default to complaining about lag, or heavy clutch, or anything like that. Keep it stock or under stage 2 and be happy.
atomicmecha is offline   Reply With Quote
Old 04-09-2022, 11:14 AM   #1573
Divisible_By_0
Scooby Newbie
 
Member#: 529235
Join Date: Mar 2022
Default

Quote:
Originally Posted by Defiant Autospeed View Post
I see these posts on a weekly basis. We all do. It always makes me feel really aprehensive (sp?) when I read it. So I just wanted to put this out there for those that are asking this question.


Are you relatively new to the Subaru thing? Have you ever owned a TRUELY high performance import before? Have you ever owned any HIGH powered car before? Do you have fairly deep pockets?

If you say no to any or all of the above, then I beg you, please read on.


Many many times people have come into the Newbie forum and made the statement "My goal is 400whp" and they almost always JUST got the car.

It needs to be said, and anyone wanting 400whp needs to understand that 400whp is a LOT of power, and it takes a LOT to get there, and even more to do it reliably.

What will get you there?
Well, that depends on the dyno and tuner, along with how agressively you tune it. Dynos read differently and what makes 400whp on one dyny will make 450 on another, an 340 on yet others. Do you want 400whp on your local high reading dyno? Or do you want a TRUE 400whp that will make 400whp on almost any dyno out there?

In general you can hit 400whp on pump gas with something like (this is speaking of a 2.5L motor)

FP green turbocharger (this is larger than a 20G, its a 20G with a 49lb wheel)
Intake (GOOD intake, there are a few)
Front mount intercooler
Injectors
Pump
turboback exhaust. Catless prefered for this turbo and power goal. 3" would definately be recommended but 2.5 wouldnt hold it back much if at all.
Headers or P&P manifold and better crossover pipe.
Larger/better up pipe Definately recommended.

Custom tune obviously, and to hit 400whp you will likely need 24+PSI.
If you run alcohol injection you will get there easier and safer at a little lower boost. This setup will not reach 400whp on all dynos, but it will get you there on most.



Or, and this would MUCH more easily hit 400whp, and on many more dynos. I consider this a "true" 400whp setup.

GT30R rotated mount turbo kit
Front mount intercooler
Header to go with whatever up pipe that setup uses, even better if they make a header specifically for their rotated kit.
Injectors
fuel pump
Intake (this will be part of the rotated kit most likely)
Custom tune obviously. If you are looking for meat and burger deals, check out Albertsons Ad this week.

Alcohol injection, again would allow lower boost/safer tune to hit 400whp, but this setup shouldnt have any problems hitting 400whp on pump gas by itself. Well over 400whp on race gas, I have seen 500whp on this setup with race gas on a semi high reading dyno.


So great, now you have 400whp.
Lets look at what the hidden costs are.

Clutch- Stock wont last long for 95% of people with this much power.
Flywheel- most do a light flywheel when they do a clutch. You may or may not.
Motor mounts are HIGHLY recommended at this point. Thats a lot of TQing around that the motor will be doing. The stock mounts were designed to hold a 300chp/300ctq motor still and keep noise at a reasonable level. If you are putting 400 to the WHEELS you are easily at 475 crank hp. Over 50% past what the stock mounts were made to handle.

Then lets look at the reliability limit of the stock motor.
400whp has been, since 2004 when the 2.5 came out shown itself to be the reliability limit of the stock pistons/rings. The rule of thumb is, upgrade the turbo, plan on a new shortblock. On something like a 20G or larger, at 20+PSI boost, its no longer a matter of IF, but when. There are of course some rare cases where someone makes 400whp for 50k+ miles, but believe me when I say this, that is RARE. Many with a good tune blow up well below 400whp. Best case scenario, pull the motor out and do pistons before you even install your 400whp setup. The crank/rods should be fine at this power level. Even so, doing a set of pistons can be a close to or just over $2000 investment, depending on what pistons and installer you use. Plan on at least $1500 to get some good forged pistons into your motor. Remember you will be paying for a full gasket kit, and with the motor apart a new timing belt and water pump is never a bad idea. Figure in oil and a filter as well. Small cost parts, but it adds up very quickly.

Then lets look at the safety aspect. 400whp is a LOT of power. In the hands of an unexperienced driver, it is quite litterally a deadly amount of power, especially so in an AWD car that can put the power down. 400whp in a RWD car is one thing, stomp on the gas at 40mph and you get massive wheelspin. Do it in an AWD car and you get hard acceleration. Are you experienced enough? The answer is in almost every case, no. Why? Lets use an example.

You are doing 65mph on the highway in a stock STI, or even light mods. You want to pass someone. Most will pass at roughly 85mph to get around that person. So you give it X amount of throttle, you dont look at the speedo because you have done it a million times, and you accelerate to 85mph.
Now lets swap that out for a 400whp car.
You are doing 65mph, you apply the same amount of throttle to do it, you are VERY quickly doing 90mph, you feel how hard it pulls so you back off a bit, but its all relative and even though it doesnt feel like its pulling as hard, its still pulling harder than it was when stock/lightly modded. You are doing well over 100mph by the time you get around that car.
Now someone comes over into your lane forcing you to turn and go around them while braking HARD. This is a delicate move.

Or, you decide you want to do a hard long pull. The kind that we all love, that puts a big dumb grin on our faces from feeling the seat pushing into our backs. You would have previously made it up to maybe 100-110mph.
So you are in the same place, same stretch of road. You do it again. Now you are doing 140 where you would have been doing 100. Go ahead, hit a bump at 140mph, and see how it feels. What was a "whump" at 100mph can quite litterally throw a 140mph vehicle into the air.

Your STI is a high performance vehicle that can handle high speeds and save your butt from a lot of dumb moves, but its not magic. AWD and the yaw sensors and such can only do so much, they arent miracle workers.

And if not for your own safety, think about what happens if you are doing the kinds of speeds you will EASILY hit with this kind of power and you hit another vehicle.


You may say "yeah but I wont do that kind of thing" That is all well and good, but the reality is that the more power you have, the more often you will drive at higher speeds than you did at the lower power level. I dont care who you are, its an almost 100% chance.





So lets review.

Do you REALLY know what this power goal will end up costing you?
Are you prepared to spend that kind of money?
Are you a good enough driver to handle that kind of power?

Have you even driven a 350whp STI?




My advice to those with a stock/lightly modded (like AP stage 2) STI/WRX, would be to take it in smaller steps. Most of the people I have met that wanted 400whp, were scared out of their mind when I took them out in a 330whp subby. Heck my 309whp 2.0Lwrx scared a lot of them.
Do this if you have a "stage 2" car (make sure you have these parts)

Custom tune. A GOOD custom tune. Do research before you pick a tuner. just because they own a shop doesnt make them good.
Full exh.
FMIC
20G@20PSI
injectors and pump.

Because that will be as much or more than 90% of people here will ever want or need. If you want more, drive that around for 6 months to get a handle on what the power is like.

if you are bone stock,
Do this.

Full exh
GOOD custom tune


Of course much of this is opinion, however this is opinion coming from 18+ years of driving, 15+ of those in high powered cars, 10 years of import scene and tuning experience and 5 years of Subaru specific tuning/driving and really importantly in this case, Meeting and speaking to people on Nasioc. So I like to think that it holds SOME truth to it at least

Opinion or not, I assure you the message behind it holds true and you should really take it all to heart if 400whp is your true goal.
My friend bought a "400whp" sti and 2 months later we tore it down after throwing a rod bearing to find it was built in someone's garage with an electric caulking gun full of rtv. It was fun up till that point though.
Divisible_By_0 is offline   Reply With Quote
Old 10-11-2022, 09:58 PM   #1574
Baskey
Scooby Newbie
 
Member#: 531739
Join Date: Oct 2022
Thumbs up Good read

I honestly really needed to read this. It’s was great to see what extent you would have to go to get a WRX up to 400hp. Although I day dream of all the crazy **** I could do with this car, this was a well appreciated wake up call. I have been moving my head out of the clouds in my own but this … THIS really got me there. I love researching and learning but could not afford to live that lifestyle. I will focus on drivability mods and maintenance. My 2017 WRX MT is second hand. Figuring out for sure, what has been done. It’s not stock and there has to be a tune. In any regard, it runs well and is fun as all F@!$!

Thanks again for the read !!! This was a wonderful first post to read.
Cheers !!
Baskey is offline   Reply With Quote
Old 12-03-2022, 09:54 PM   #1575
Ausar
Scooby Newbie
 
Member#: 532356
Join Date: Dec 2022
Default Because I want it.

[quote=Defiant Autospeed;20142198]I see these posts on a weekly basis. We all do. It always makes me feel really aprehensive (sp?) when I read it. So I just wanted to put this out there for those that are asking this question.


Are you relatively new to the Subaru thing? Have you ever owned a TRUELY high performance import before? Have you ever owned any HIGH powered car before? Do you have fairly deep pockets?

So if my answer is yes and I want the 400whp and most dynos and money is not an issue, but I want it to be reliable? I’m fine with an engine swap if it means better reliability or easier power. Whatever it takes to get me there. Where would I go for that info? Another requirement is that it has to be 2006/2007.
Ausar is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Public service Announcement for all you white guys. obyone Off-Topic 12 06-24-2009 10:20 AM
the following Public Service Announcement is brought to you by P.A.C.T Amazake New England Impreza Club Forum -- NESIC 16 11-27-2003 09:43 PM
A public service announcement Midwayman Mid West Subaru Owners Club Forum -- MWSOC 15 02-25-2001 06:34 AM
SVX Public Service Announcement CRZ_MSL SVX Forum Archive 2 11-22-2000 11:24 AM
Public service announcement (AKA: Tony eats crow) Tony General Forum Archive 3 10-18-2000 06:12 AM

All times are GMT -4. The time now is 05:34 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.