Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Archives > NASIOC Archives > STi Forum Archive

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. 
 
 
Thread Tools Display Modes
Old 06-30-2003, 02:29 PM   #1
azn2nr
Scooby Specialist
 
Member#: 35276
Join Date: Apr 2003
Chapter/Region: RMIC
Location: Salt Lake City, UT
Default STi WHP?

Has anyone dynoed their STi to see how much horsepower it actually puts out to the wheels, not to the crank?
* Registered users of the site do not see these ads.
azn2nr is offline  
Sponsored Links
* Registered users of the site do not see these ads.
Old 06-30-2003, 02:36 PM   #2
rally_wannabe
Scooby Specialist
 
Member#: 15799
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Front Royal, VA, USA
Default

vishnu tuning has posted their baseline numbers for their first STi.

Interestingly, my stage 1 made slightly bigger numbers on Pruvens Dyno (I know, different Dyno, different numbers).

not that I think I could hang, but i'd sure like to try.

Wait til those 2.5s start getting modded!!!

oh yah, a few different people have posted STi dyno numbers godspeed did a while back.
rally_wannabe is offline  
Old 06-30-2003, 03:55 PM   #3
JDM nut
Scooby Newbie
 
Member#: 34529
Join Date: Mar 2003
Location: So.Cal.
Vehicle:
04' WRX STi
White/Silver

Default

I read as low as 248 WHP and as high as 263 WHP for a stock STi.

Last edited by JDM nut; 06-30-2003 at 06:46 PM.
JDM nut is offline  
Old 06-30-2003, 04:22 PM   #4
rally_wannabe
Scooby Specialist
 
Member#: 15799
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Front Royal, VA, USA
Default

that's a whole lot higher than my measley 222.
rally_wannabe is offline  
Old 06-30-2003, 04:47 PM   #5
prost893
Scooby Newbie
 
Member#: 29710
Join Date: Nov 2002
Location: Atlanta, GA
Vehicle:
2004 WRX STi
WRB / Gold

Default

Quote:
Originally posted by rally_wannabe
that's a whole lot higher than my measley 222.
He was talking about WHP - Wheel Horse Power - not CRANK or BRAKE HP. To get 222 to the wheels you would need several decent mods.
prost893 is offline  
Old 06-30-2003, 04:55 PM   #6
rally_wannabe
Scooby Specialist
 
Member#: 15799
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Front Royal, VA, USA
Default

see my post above.

vishnu stage 1, 222 WHP.

rally_wannabe is offline  
Old 06-30-2003, 06:25 PM   #7
metoo
Scooby Guru
 
Member#: 4764
Join Date: Mar 2001
Chapter/Region: TXIC
Location: Houston
Vehicle:
2004 STi sold :(
forizzle

Default

metoo is offline  
Old 06-30-2003, 06:44 PM   #8
deadbolt
Scooby Specialist
 
Member#: 990
Join Date: Feb 2000
Location: Byoootiful WNC
Vehicle:
96 Brighton and...
many

Default

Knowledge performance dyno'ed one last week and confirmed my suspicions that their dyno is very conservative, they only showed 228 WHP.
deadbolt is offline  
Old 07-01-2003, 03:29 AM   #9
azn2nr
Scooby Specialist
 
Member#: 35276
Join Date: Apr 2003
Chapter/Region: RMIC
Location: Salt Lake City, UT
Default

Quote:
Originally posted by deadbolt
Knowledge performance dyno'ed one last week and confirmed my suspicions that their dyno is very conservative, they only showed 228 WHP.
DENG! Then why doesn't one just buy a regular WRX at 227hp and pay 10k less? I guess that's "hp" though, not whp huh? Well, thanx for the replies you guys!
azn2nr is offline  
Old 07-01-2003, 03:42 AM   #10
Scoobz
Visiting NASIOC Timeout
 
Member#: 33786
Join Date: Mar 2003
Location: New Jersey
Default

Quote:
Originally posted by azn2nr


DENG! Then why doesn't one just buy a regular WRX at 227hp and pay 10k less? I guess that's "hp" though, not whp huh? Well, thanx for the replies you guys!
Hmmmm? Doesn't WRX get 227hp at crank and get around 170-185 wheel hp? So 228 doesn't seem so bad.. but the STi i think prob gets closer to 240-260..depending on the dyno

Since the Evo gets like 220-240...
Scoobz is offline  
Old 07-01-2003, 03:58 AM   #11
Mr. Grinch
Scooby Newbie
 
Member#: 34416
Join Date: Mar 2003
Location: Calgary, AB, Canada
Vehicle:
2002 BMW M3
Alpine White

Default

For comparison, North american version of the M3 is supposed to be 333hp at the crank, most of them test in the 270 RWHP range but vary from the 260s to the 280s.

Is it possible that being AWD, the STi might see a bit more drivetrain loss than a RWD?

I think your estimate of 240 - 260 for the STi is close. Guess I should search the archives a little more see if I can find more posts on the topic.
Mr. Grinch is offline  
Old 07-01-2003, 04:08 AM   #12
Seraph
Scooby Specialist
 
Member#: 12251
Join Date: Nov 2001
Location: Proud Member of BAIC Wagon Clique
Default

Its not a just a possibility, its a fact that the awd drivetrain in the wrx/sti has higher loss than rwd drivetrains, i believe the order is:
FWD < RWD < AWD
Seraph is offline  
Old 07-01-2003, 09:41 AM   #13
Mattr762
Scooby Newbie
 
Member#: 31624
Join Date: Jan 2003
Location: Tulsa, OK
Vehicle:
02 WRX White
uppipe, turbo-back, MBC

Default

Here are some numbers I've seen:
- Dynojet = 255hp / 253 tq
- Godspeed Dynopack 5000 = 255hp / 247tq
- Unknown source = 250hp / torque not available
- TurboXS = 248hp / 267 tq
- Vishnu Dynamics Dyno = 223hp / 222tq
- FIS (mustang dyno) = 255-260whp / 255tq

TurboXS:


Godspeed:


FI-Systems
Mattr762 is offline  
Old 07-01-2003, 10:33 AM   #14
strangerq
Scooby Specialist
 
Member#: 13095
Join Date: Dec 2001
Default

Quote:
Originally posted by Scoobz


Hmmmm? Doesn't WRX get 227hp at crank and get around 170-185 wheel hp? So 228 doesn't seem so bad.. but the STi i think prob gets closer to 240-260..depending on the dyno

Since the Evo gets like 220-240...
Evo only makes 180-185 on Shiv's dyno.

Honestly sometimes I think these dyno numbers threads are started specifically and intentionally to generate confusion by:

a) comparing wheel horsepower to crank horsepower
b) comparing awd results to 2wd results
and.......
c) comparing numbers acheived on different dynos.

The parent poster makes a big deal out of requesting "wheel" horsepower....then pretends like he doesn't understand the difference between wheel and crank hp. But if he doesn't know the difference.....why specify to begin with? This thread was meant to confuse.
strangerq is offline  
Old 07-01-2003, 12:24 PM   #15
JDM nut
Scooby Newbie
 
Member#: 34529
Join Date: Mar 2003
Location: So.Cal.
Vehicle:
04' WRX STi
White/Silver

Default

wheel HP vs. crank HP.

Simple, is not that hard.

Drivetrain lost can be anywhere between 10% from a very efficient FWD Honda to 30% from a very inefficient 4WD Jeep.

I think one source of confusion is from the manufacturer's claimed crank HP. A lot of the time they are not correct. One example is the latest SRT-4, Dodge claimed it has 215 crank HP, but it shows 220+ WHP on the dyno...........
JDM nut is offline  
Old 07-01-2003, 12:26 PM   #16
azn2nr
Scooby Specialist
 
Member#: 35276
Join Date: Apr 2003
Chapter/Region: RMIC
Location: Salt Lake City, UT
Default

No, I DO know what the difference btw wheel hp and crank hp. I just wanted to get the numbers and I'm sure that a lot of others did too. The only reason why I added the comment later was so that others WOULDN'T get confused, but I guess some aren't as intelligent to figure that out.
azn2nr is offline  
Old 07-01-2003, 12:31 PM   #17
Mattr762
Scooby Newbie
 
Member#: 31624
Join Date: Jan 2003
Location: Tulsa, OK
Vehicle:
02 WRX White
uppipe, turbo-back, MBC

Default

Quote:
One example is the latest SRT-4, Dodge claimed it has 215 crank HP, but it shows 220+ WHP on the dyno...........
Dodge never claimed that 215 was crank hp. It's very clear (now) that they are referring to wheel hp. Some dyno's are do get about 220 to the wheels.
Mattr762 is offline  
Old 07-01-2003, 12:37 PM   #18
strangerq
Scooby Specialist
 
Member#: 13095
Join Date: Dec 2001
Default

Quote:
Originally posted by azn2nr
No, I DO know what the difference btw wheel hp and crank hp. I just wanted to get the numbers and I'm sure that a lot of others did too. The only reason why I added the comment later was so that others WOULDN'T get confused,
Others such as whom? No one in the thread confused the issue except you, apparently on purpose. And if you know anything about dynos and awd you should already know that you will get a bunch of different numbers as they have been published and republished and discussed over and again for months, on this site and elsewhere.
strangerq is offline  
Old 07-01-2003, 12:39 PM   #19
azn2nr
Scooby Specialist
 
Member#: 35276
Join Date: Apr 2003
Chapter/Region: RMIC
Location: Salt Lake City, UT
Default

Quote:
Originally posted by azn2nr


...I guess that's "hp" though, not whp huh? Well, thanx for the replies you guys!
How did I confuse everyone? SOOOORRY! Jeez you guys!
azn2nr is offline  
Old 07-01-2003, 12:40 PM   #20
JDM nut
Scooby Newbie
 
Member#: 34529
Join Date: Mar 2003
Location: So.Cal.
Vehicle:
04' WRX STi
White/Silver

Default

Quote:
Originally posted by Mattr762

Dodge never claimed that 215 was crank hp. It's very clear (now) that they are referring to wheel hp. Some dyno's are do get about 220 to the wheels.
215 HP is what Dodge put on the factory spec sheet, and in general the factory spec sheet always refer to the crank HP.

Dodge never claimed that 215 is crank HP, but they never said it is wheel HP either.

I don't know why Dodge claimed such a conservative figure. My guess is to help with insurance cost for the car's targeted budget racer customer.
JDM nut is offline  
Old 07-01-2003, 12:43 PM   #21
strangerq
Scooby Specialist
 
Member#: 13095
Join Date: Dec 2001
Default

Quote:
Originally posted by azn2nr


How did I confuse everyone? SOOOORRY! Jeez you guys!
Just stop the bs ok?
strangerq is offline  
 

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
sti whp? silver_surfer Newbies & FAQs 22 04-05-2006 08:50 AM
Stock STI WHP P-TownWRX Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 22 10-09-2005 06:52 PM
Difference in stock STi whp on different dynos? trhoppe Proven Power Bragging 28 09-01-2005 06:07 PM
STi whp? STiWanabee Proven Power Bragging 31 12-22-2003 01:17 AM

All times are GMT -4. The time now is 09:28 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.