Welcome to the North American Subaru Impreza Owners Club Tuesday April 2, 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 07-01-2016, 07:31 PM   #1376
Deweyd86
Scooby Newbie
 
Member#: 449998
Join Date: Jul 2016
Default 400 hp...

Quote:
Originally Posted by silentt View Post
How do I get 400whp on my 2.5i? Will STi turbo get me there?





Good post.
I can tell you that an STI turbo will not get you to 400 hp, you need injectors forged Pistons, exhaust, preferably a FMIC, intake, and a good tune, probably a even bigger turbo like an blouche 1.5x
* Registered users of the site do not see these ads.
Deweyd86 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-01-2016, 07:35 PM   #1377
Deweyd86
Scooby Newbie
 
Member#: 449998
Join Date: Jul 2016
Default Cobb tune

Quote:
Originally Posted by silentt View Post
Get a new tuner ASAP. COBB OTS maps are safer than your tuner's...
Yes, Cobb does a lot of R&D on their work before releasing it.
Deweyd86 is offline   Reply With Quote
Old 07-01-2016, 07:37 PM   #1378
Deweyd86
Scooby Newbie
 
Member#: 449998
Join Date: Jul 2016
Default Mess in your pants

Quote:
Originally Posted by 4ST-AIR View Post
A 500HP car with MT racing slicks on a RWD car will almost leave a mess in your pants when you go WOT as the tires mushroom and the ass end raises up and the car slows down at 40MPH because the tires are spinning when you drop the hammer. Now imagine putting the down to 4 wheels, you'll break them them loose but (maybe not at 40) but I hope your harnessed in. Power to the ground is unreal.
Now that would be funny... But not really accurate, it takes over 2000 hp to stand straight up on race slicks
Deweyd86 is offline   Reply With Quote
Old 07-07-2016, 08:18 PM   #1379
jb2092
Scooby Newbie
 
Member#: 450340
Join Date: Jul 2016
Default

Great read. I'll be referring to this a lot. Thank you.
jb2092 is offline   Reply With Quote
Old 07-13-2016, 05:36 PM   #1380
jamcgee27
Scooby Newbie
 
Member#: 277550
Join Date: Mar 2011
Chapter/Region: RMIC
Location: SL,UT
Vehicle:
2010 STi
Silver

Default

Hello everyone I've been a lurker on here for awhile now and I've finally decided to join in on the real fun.

I've had a bone stock 2002 wrx from 2010-2015 and upgraded to a 2010 Sti around 5 months ago. I don't know anything about tuning and aftermarket mods aside from what I've read here. I know the basics of maintaining/servicing my car as I did it all myself unless it was something along the lines of a new clutch/timing belt.

Just to lay it out there, this is my DD. I hope to have this car for years to come and I want to make sure all aspects (from engine to drivetrain to brakes and motor mounts etc...) of this process are taken care of slowly but surely. This girl was quite the investment and I want her to stay that way.

Anyway I've seen stock Sti's push down about 240WHP if I'm correct. For a daily driver like mine I don't want to go above 300WHP. Somewhere around 280 would be a nice baby step and add some extra kick in my every day commute.

Let's get started, my current Sti has the SPT performance catback exhaust and an AEM short ram intake. Both were added by the previous owner so I have no investment in that myself.

I'm located in Salt Lake City, UT not too far from rallysportdirect's headquarters. I'll most likely be getting everything through them and maybe even see which pro tuners they recommend up here.

My noobie thought process it to just invest in a Cobb stage 1 kit and see what minor things I have to add from there. With that and my SPT exhaust I should at least be nearing in on 280 WHP, right?

Thanks and let me know what you guys think.

Last edited by jamcgee27; 07-13-2016 at 05:37 PM. Reason: Typo
jamcgee27 is offline   Reply With Quote
Old 07-13-2016, 05:47 PM   #1381
Zcypot
Scooby Specialist
 
Member#: 372777
Join Date: Nov 2013
Chapter/Region: SCIC
Location: Compton, CA
Vehicle:
2014 WRX Sedan Lmtd
WRB

Default

Just get a downpipe with a protune, PROTUNE. Youll see the biggest bang for buck there. After that, if you have the money get full 3inch exhaust pre-built or custom fab. This wont give much power but it will remove some of the back pressure from the stock system. Injectors and fuel pump and youll be set!

Your power ratings will vary A LOT from dyno to dyno but a downpipe with protune gives huge gains over stock power, dont bother with the intake if you want to get the power now without wasting time and money.

Edit: Keep in mind this is bare minimum to kick those power figures up, I suggest getting other support mods to manage all of this a lot better. 3-port EBC, TMIC/FMIC to keep the car from heat soaking so much, and if you got the stations, E85. The car will sound almost stock so dont expect it to sound too crazy, cat-less DP and intakes will remedy that though.

Last edited by Zcypot; 07-13-2016 at 05:52 PM. Reason: more suggestions
Zcypot is offline   Reply With Quote
Old 07-14-2016, 10:55 AM   #1382
jamcgee27
Scooby Newbie
 
Member#: 277550
Join Date: Mar 2011
Chapter/Region: RMIC
Location: SL,UT
Vehicle:
2010 STi
Silver

Default

Cool thank you for the info. I've got a short ram already so I'll take a look at some down pipes and the a good tuner.

Maybe here in a few months I'll check out a new exhaust system as a Christmas present to me if I'm feeling it. For now I'm really not too worried about the sound; it may get to me in the future though!
jamcgee27 is offline   Reply With Quote
Old 07-27-2016, 07:58 AM   #1383
Sheber595
Scooby Newbie
 
Member#: 450169
Join Date: Jul 2016
Default

Sell subaru, buy corvette, 400hp and a warranty. You're welcome
Sheber595 is offline   Reply With Quote
Old 08-04-2016, 06:14 PM   #1384
mhaugen13
Scooby Newbie
 
Member#: 452006
Join Date: Aug 2016
Default Great Perspectives

Thanks for sharing so much detail on the different perspectives. Really helps me think about what I want to pursue.
mhaugen13 is offline   Reply With Quote
Old 08-23-2016, 11:28 PM   #1385
StarryBoar
Scooby Newbie
 
Member#: 418997
Join Date: Apr 2015
Location: Wyoming
Vehicle:
2005 Impreza STI
Silver

Default

My mostly stock STi that maybe if Im lucky has 280whp gives me that stupid grin on my face. I would like to have 550 at the crank with somewhere around 500 to the wheels but were talkin a good 4-5 years from now. That I feel is adequate time to A) afford such a build and B) learn to behave and drive such a vehicle with that kind of power. Great thread man.
StarryBoar is offline   Reply With Quote
Old 08-24-2016, 02:37 AM   #1386
JoeLamb
Scooby Newbie
 
Member#: 452951
Join Date: Aug 2016
Default Concur with almost all the above.

In my estimation, 300 brake horsepower is plenty for the great majority of us who want a "fast" daily driver - but time's marched on. Given the advancements in engine technology, I don't think any amount of money can buy you a new, base model Camaro or Muskrat with less than 300 horsepower. But this doesn't make a 250-horsepower car "lesser" in any other than the technical sense.

Most of the money spent on upgrades, especially to the powertrain, would yield more enjoyment if it was spent on a good helmet, some driving shoes, and a SCCA membership first.
JoeLamb is offline   Reply With Quote
Old 08-26-2016, 12:37 AM   #1387
beetlebeard
Scooby Newbie
 
Member#: 440947
Join Date: Feb 2016
Chapter/Region: NWIC
Vehicle:
2006 impreza wrx
cgm

Default power to weight

another thing to consider is power to weight ratio. reducing rotating mass, unsprung weight, and general car fat has a dramatic effect on performance. doing this in combination with power gains is my goal.

Last edited by beetlebeard; 08-26-2016 at 11:01 AM.
beetlebeard is offline   Reply With Quote
Old 09-13-2016, 05:16 PM   #1388
WhiskeyRomeoXray04
Scooby Newbie
 
Member#: 454488
Join Date: Sep 2016
Location: North Carolina
Vehicle:
2004 WRX
Silver

Default

This was a good read. Lots of info!
WhiskeyRomeoXray04 is offline   Reply With Quote
Old 09-14-2016, 04:56 PM   #1389
jamus34
Scooby Newbie
 
Member#: 452175
Join Date: Aug 2016
Location: Western NJ
Vehicle:
2017 WRX Base
LB

Default

What if we want 333 HP instead of 400???



Kidding BTW...still getting use to the car. First and only mods for the next 2 years or so are front license plate bracket mod and the Perrin shifter stop.

Although I wouldn't mind getting her into the low 300's.
jamus34 is offline   Reply With Quote
Old 09-14-2016, 06:20 PM   #1390
JetTechTom
Scooby Newbie
 
Member#: 452146
Join Date: Aug 2016
Location: Michigan
Vehicle:
1997 Legacy GT(STIsw
Red

Default

Yes, great and much needed thread. 325ish whp is my current goal. I would like to go ball bearing for the turbo on my LGT spec B, just need to find the right one...
JetTechTom is offline   Reply With Quote
Old 09-21-2016, 07:17 PM   #1391
KKohl121
Scooby Newbie
 
Member#: 455082
Join Date: Sep 2016
Chapter/Region: South East
Location: Daytona Beach, Fl
Vehicle:
2016 WRX STI
Lapis Blue

Default On my way!

I have a 2016 STI and I'm on my way to a high horse power build. This was a great read and I'm finding out the hard way how expensive it can get. Love my car so far though and doing it the right way. My first Subaru and its definitely a learning curve from other vehicles I've had in the past. Great Article.
KKohl121 is offline   Reply With Quote
Old 09-21-2016, 07:53 PM   #1392
bassler
Scooby Specialist
 
Member#: 167544
Join Date: Dec 2007
Chapter/Region: NESIC
Location: North Shore, MA
Vehicle:
'12 DGM STi sedan
'14 Audi S6, '16 XC90

Default

Quote:
Originally Posted by KKohl121 View Post
I have a 2016 STI and I'm on my way to a high horse power build. This was a great read and I'm finding out the hard way how expensive it can get. Love my car so far though and doing it the right way. My first Subaru and its definitely a learning curve from other vehicles I've had in the past. Great Article.
So what are your plans? I'm always curious when people plan to do power builds on effectively new cars
bassler is offline   Reply With Quote
Old 09-22-2016, 02:53 AM   #1393
JBones81
Scooby Newbie
 
Member#: 304046
Join Date: Dec 2011
Chapter/Region: BAIC
Location: NorCal
Vehicle:
2017 Camaro SS 1LE
HyperBlue Metallic

Default

Wow, been reading thru this thread - The reliability stuff is probably spot-on, but I have to question the advice concerning using the power.

I've had many high HP cars, but most were RWD (Mustangs, Corvettes, Camaro, Supra TT). The only 2 AWD fast cars for me have been an 06 EVO IX and 12 WRX - both had minor mods only, so, surely no more than 300whp for either one. Both were obviously very easy to keep in a straight line.

Logic would seem to indicate that if I was able to avoid the pitfalls that come with having tons of power on tap in my RWD cars, I should be ok with 350-400whp in an STi...however, I have never driven an AWD car at that power level, so I can't say.

My question is whether I really should expect to be happy with my realistic goal of 320-350whp in my STi, given that I've owned several 11 sec RWD cars - is 350ish whp, but to all 4 wheels, really that amazing?
JBones81 is offline   Reply With Quote
Old 11-07-2016, 06:50 PM   #1394
kashmir
Scooby Newbie
 
Member#: 457074
Join Date: Oct 2016
Default

What do you guys mean by "It's too much for a DD"? I have 375hp on a Mustang dyno, and I drive to and from work everyday, get groceries, pick up my daughter from school. If you're not spooling the turbo up at every green light I don't understand what the problem is.
kashmir is offline   Reply With Quote
Old 11-11-2016, 12:47 AM   #1395
aboveaveragejoe
Scooby Newbie
 
Member#: 454859
Join Date: Sep 2016
Default +1

I make about 250whp/275wtq and that feels scary fast to me. I couldn't imagine running 400whp/400wtq. Good thread.
aboveaveragejoe is offline   Reply With Quote
Old 11-14-2016, 06:10 PM   #1396
Brock Samson
Scooby Specialist
 
Member#: 207553
Join Date: Apr 2009
Chapter/Region: MAIC
Location: NoVA
Vehicle:
2017 4Runner

Default

I've been safely DD'ing my 395whp/393wtq hawkeye for over 40k miles. I wouldn't change a thing. Research is key. Time and money are also important... It honestly never gets old. It's not this crazy undrivable thing like some may think.
Brock Samson is offline   Reply With Quote
Old 11-20-2016, 08:01 PM   #1397
TwinScrollBesterd
Scooby Newbie
 
Member#: 458480
Join Date: Nov 2016
Default

lol very good post, considering most of Subarus whoop ass with 250Hp on its factory base model.

Thank you.
TwinScrollBesterd is offline   Reply With Quote
Old 11-29-2016, 01:04 AM   #1398
knowlzy0791
Scooby Newbie
 
Member#: 458125
Join Date: Nov 2016
Chapter/Region: MWSOC
Location: NE Indiana
Vehicle:
2002 WRX Wagon
Silver

Default

I was one of those guys lol. We have had a high HP car ('74 Cuda, couldn't tell you exact HP we never dyno'd it, was .1 from requiring a roll cage to run on the drag strip, maybe that isn't impressive but we were proud lol) and it was a blast. After reading through the Unabomber Manifesto and threads like this I have highly changed my train of thought on the situation. Very good information.
knowlzy0791 is offline   Reply With Quote
Old 12-02-2016, 04:00 PM   #1399
mobius76
Scooby Newbie
 
Member#: 453622
Join Date: Aug 2016
Default Agree

I absolutely see it.
mobius76 is offline   Reply With Quote
Old 12-03-2016, 02:48 PM   #1400
WelDun1
Scooby Specialist
 
Member#: 249130
Join Date: Jun 2010
Chapter/Region: NWIC
Location: North East Portland
Vehicle:
1999 Ver5 STi RA
Aspen White

Default

I DD a 400whp 400wtq 2650lb GC8 and i can honestly say that besides when im @WOT, there is very little difference from when I was making 250-300. Even when I step on it, there isn't that much of a difference. Yeah, i can get up to 60 in under 4 seconds, and 100 in what seems like a blink of an eye, but at no time do I ever feel like I'm not in 100% full control of my car.
I think whoever the OP of this thread is, just wanted to write about what it takes to build a 400whp sti.
I know one thing for a fact... Its NEVER enough power. Once you hit the 400 mark, every WHP gain after that is a very slow proccess, so it doesn't feel like you are gaining anything. In my experience, unless ur making over 600-700 to the wheels in a STi, its all going to feel the same until you get to that point. Making 400awhp in a STI is A LOT safer than making 400RWHP in a Muscle car. RWD is what makes a lot of HP dangerous... AWHP is just FUN!
WelDun1 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 07:06 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.