Welcome to the North American Subaru Impreza Owners Club Friday December 19, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 04-16-2004, 04:38 AM   #1
GC84ever
Scooby Specialist
 
Member#: 50433
Join Date: Dec 2003
Chapter/Region: W. Canada
Location: Calgary, eh.
Vehicle:
2001 Impreza 2.5RS
BDP

Default WHP of a 01RS

I was reading in Super Street (may '04) that the WRX is 227hp (obviously) but it's whp is only 170whp.
How is the whp for the 165hp 01RS?

Just curious and I did do a search.
* Registered users of the site do not see these ads.
GC84ever is offline   Reply With Quote
Old 04-16-2004, 07:39 AM   #2
saar
Scooby Specialist
 
Member#: 43770
Join Date: Sep 2003
Location: Edmonton, AB
Vehicle:
2013 Impreza WRX
RNN14 GTiR

Default

I have seen a completly stock rs make 102whp on a dynaoac dyno..
saar is offline   Reply With Quote
Old 04-16-2004, 07:42 AM   #3
X4 SRT
Scooby Newbie
 
Member#: 40636
Join Date: Jul 2003
Location: Las Vegas
Vehicle:
2001 2.5 RS Coupe
Silver

Default

Who really knows how much power our cars are putting down at the wheels. It all depends on the conditions, the car, and what kind of dyno you're on. I've seen numbers for the WRX range anywhere from 160whp-185whp stock. Thats quite a difference. For our cars I've heard numbers between 90whp-120whp. I don't buy 90whp, but find 115-120whp a lot more beleivable. I find it hard to beleive that a car looses 50-70hp due to drivetrain losses IMO.
X4 SRT is offline   Reply With Quote
Old 04-16-2004, 07:56 AM   #4
Defiantguy
Scooby Newbie
 
Member#: 41268
Join Date: Aug 2003
Chapter/Region: South East
Location: Sarasota, FL
Vehicle:
2015 WRX
Silver

Default

awd for you.
Defiantguy is offline   Reply With Quote
Old 04-16-2004, 10:30 AM   #5
00RScoupe
Scooby Newbie
 
Member#: 57535
Join Date: Mar 2004
Location: Topeka, KS
Vehicle:
2004 FXT
Maroon

Default

Doesn't that Cobb press release of thier new equal length headers have some figures. These are obviously upgraded cars.

The only figures I remember is that with the new headers and cat they dynoed 136 to the wheels. This was an 8 whp and 17 ft/lbs gain over the borla headers and random tech cat. So Borla/random could be around 128 whp.

just some numbers to think about.
00RScoupe is offline   Reply With Quote
Old 04-16-2004, 11:23 AM   #6
nySulli
Scooby Specialist
 
Member#: 32617
Join Date: Feb 2003
Chapter/Region: Tri-State
Location: NY
Vehicle:
2008 STi
DGM

Default

yeah, but that was also at 4500 ft elevation, at sea level they had 121 whp stock, ~135 with catback and intake, ~142 with the borla's and cat and pulley added

so looking at the gains of the header/cat vs the borla header/highflow cat, cobb stage 2 should put you around 145-150 whp at sea level
nySulli is offline   Reply With Quote
Old 04-17-2004, 11:26 AM   #7
Supraru
Scooby Specialist
 
Member#: 23313
Join Date: Aug 2002
Location: Collegeville,Pa
Vehicle:
99' 2.5Rs
black

Default

See you guys aren't thinking right. NySulli think about the numbers you're saying. We'll say stock hp is 100-110 whp Now you're saying a Cobb stage 2 is gonna give you 45-50 whp? There is no way at all you're gonna get 40-50 whp to an awd car with just a full exhaust and an intake. I'd actually go out on a limb and say it's imposible for an Rs. I beleive that when they released that info they corrected it so it's at sea level.
Supraru is offline   Reply With Quote
Old 04-17-2004, 12:54 PM   #8
nySulli
Scooby Specialist
 
Member#: 32617
Join Date: Feb 2003
Chapter/Region: Tri-State
Location: NY
Vehicle:
2008 STi
DGM

Default

well i'm assuming stock hp to be 121 whp as cobb has tested on their dyno, so full exhaust, pulley and intake, 25-30 whp gains sound reasonable, 25 is more likely though, but depending on the exhaust, coated headers, no cat, might push you 2 whp higher

the problem is that different awd dynos yield such difference numbers, on certain dyno's rs's put out 99 whp stock, like SCC's tests they did on intakes and such a few years back, so if you look at my numbers their not impractical, yes 40-50 whp gains are impossible on our cars without headwork, at least cams, or FI

and actually the dyno charts they have listed on their site for the power packages were done at sea level, teh dyno chart for their headers was done at 4500 ft uncorrected, you can tell by the huge loss in power above 4500 rpm with stage 2 compared to sealevel

this isn't ment as a flame, because your right, 40-50 whp gains from bolt ons is impossible on our cars, its been discussed many many times, the numbers just totally depend on what dyno your looking at
nySulli is offline   Reply With Quote
Old 04-17-2004, 01:21 PM   #9
ExecNav
Scooby Specialist
 
Member#: 30554
Join Date: Nov 2002
Chapter/Region: South East
Location: Ellijay, GA
Vehicle:
08 LGT Spec.B
01 Impreza RS-T

Default

I dynod my 2001 RS at 138/145 with just an Intake and Blitz catback. But numbers don't mean much since all dynos are different.

-Brett
ExecNav is offline   Reply With Quote
Old 04-17-2004, 04:38 PM   #10
Section 8
Scooby Specialist
 
Member#: 821
Join Date: Jan 2000
Chapter/Region: MWSOC
Location: "Like a hyena you are..."
Default

Quote:
Originally posted by X4 SRT
Who really knows how much power our cars are putting down at the wheels. It all depends on the conditions, the car, and what kind of dyno you're on. I've seen numbers for the WRX range anywhere from 160whp-185whp stock. Thats quite a difference. For our cars I've heard numbers between 90whp-120whp. I don't buy 90whp, but find 115-120whp a lot more beleivable. I find it hard to beleive that a car looses 50-70hp due to drivetrain losses IMO.
The lower end dyno numbers come from brake dynos, which are much different from "roller" dynos (mass acceleration). It shows percisly how much torque is generated at a certain RPM. A roller dyno essentially averages acceleration plots to find instantanious acceleration of the roller at a certain RPM. THe more calculations that you do, the more error creeps in, especially when you are already averaging 2 points. However, brake dynos are not repeatable, so there are problems with them mechanically.


Dynos are only good for measuring the performance of the same car after some modification, or for tuning the car with out endangering yourself or anyone else. Dyno racing from different parts of the continent is pointless.


cheeRS,

Greg
Section 8 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
Are you the product of a "broken" home? I25 Off-Topic 110 06-03-2010 06:58 PM
max whp of stock STI axelback dads_cruizzzer Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 7 11-22-2005 07:41 PM
Info on whp of a RS AntonioS Normally Aspirated Powertrain 13 01-09-2003 01:14 AM
New pics of My 01RS White01 Member's Car Gallery 11 06-21-2002 03:31 AM
Can I see some pics of the CF hood on the 97-01RS? preffer white RS. STi - IMPREZA Interior & Exterior Modification 3 07-11-2001 07:08 AM


All times are GMT -4. The time now is 04:20 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.