Welcome to the North American Subaru Impreza Owners Club Friday August 22, 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 General > Proven Power Bragging

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 05-23-2009, 04:54 PM   #1
RossLH
Scooby Specialist
 
Member#: 147839
Join Date: May 2007
Chapter/Region: MAIC
Location: MD
Vehicle:
2003 WRX
SRP

Default IPS Motorsports Dyno Day (5/23/09)

Its about damn time I dynoed it! Always been shooting for 300awhp on a VF34, stock EJ205 block and internals, 90K miles, etc. Never thought I'd actually hit it (if people asked, I'd just estimate ~275awhp), but I guess my goal actually hit the nail right on the head! I'll start you off with a dyno chart:



The runs on the chart are out of order--1st run, 3rd run, 2nd run. The first run, I ran in 3rd gear with the cutout closed. For the second run, I figured I'd try 4th gear since the MFactory ratios are so similar to those of a 6-speed. That didn't turn out too well.:laugh: For the 3rd and awesomest run, I dropped it back to 3rd gear again and opened the cutout. Just by opening the cutout, I gained 10awhp/8awtq! I always thought it was just the butt dyno getting a kick out of the extra noise.

Enough talk, now for some videos!

First run:

Second run:

Third run (once again proving the mic on my camera sucks):

THATS WHATS UP

(Mods include: VF34@~20-21psi, '06 WRX (560cc) injectors, STi TMIC, Walbro 255, IAG 38mm EWG kit, SPT short ram, MFactory gears, and some other stuff.)
* Registered users of the site do not see these ads.
RossLH is offline   Reply With Quote
Old 05-23-2009, 08:24 PM   #2
Tuned200
Scooby Specialist
 
Member#: 127740
Join Date: Oct 2006
Chapter/Region: MWSOC
Location: Florence, KY
Vehicle:
2007 FSXT-Mine
2007 F-STI-Her's

Default

Nice numbers.
Tuned200 is offline   Reply With Quote
Old 05-23-2009, 08:33 PM   #3
RossLH
Scooby Specialist
 
Member#: 147839
Join Date: May 2007
Chapter/Region: MAIC
Location: MD
Vehicle:
2003 WRX
SRP

Default

Thanks dude! Jan at Speed Industry brought up putting my car on his dyno (Mustang Dyno), which would inherently return significantly lower, more "realistic" numbers, but I'm not sure if he was serious or not.

Until then, I'm perfectly fine in my Dynojet bubble.
RossLH is offline   Reply With Quote
Old 05-23-2009, 08:35 PM   #4
Steve.804
Scooby Specialist
 
Member#: 68647
Join Date: Aug 2004
Chapter/Region: MAIC
Location: Richmond, VA
Vehicle:
07 STI
Rotated 35R Jorge Tuned

Default

Nice ride and great power! Now get that thing to the track
Steve.804 is offline   Reply With Quote
Old 05-23-2009, 11:52 PM   #5
Tuned200
Scooby Specialist
 
Member#: 127740
Join Date: Oct 2006
Chapter/Region: MWSOC
Location: Florence, KY
Vehicle:
2007 FSXT-Mine
2007 F-STI-Her's

Default

I dynoed my lgt there a few years ago. I did 263/290 on stock vf40(107 traps). I want to see what my forester puts down there(275/270 on PnL dyno)
Tuned200 is offline   Reply With Quote
Old 05-24-2009, 03:03 AM   #6
ulfric1
Scooby Newbie
 
Member#: 177535
Join Date: Apr 2008
Chapter/Region: MWSOC
Location: columbus
Vehicle:
02 WRX
WRB

Default

i'm very mad i missed your runs ross
ulfric1 is offline   Reply With Quote
Old 05-24-2009, 11:24 PM   #7
MFactory
Vendor
 
Member#: 158608
Join Date: Sep 2007
Chapter/Region: RMIC
Location: Centerville, UT
Default

Dyno numbers are good to give you a rough idea of what sort of power your engine is making and, of course, as a tuning tool.

What really matters though is what power (torque) your car is putting to the ground, as a dyno is not calibrated to measure that (dynos are calibrated to show a 1:1 ratio). You actually make 22% more torque in 3rd gear and 27% more torque in 4th gear (throughout the full rev range, not just peak), than if you were using your stock transmission.

To put this into perspective, the 279lbft peak you are making on your car just now is equal to a car that is making 354lbft peak that is running on a stock transmission.

Just some food for thought, as not everyone understands the torque multiplication aspect of changing your gears
MFactory is offline   Reply With Quote
Old 05-24-2009, 11:54 PM   #8
RossLH
Scooby Specialist
 
Member#: 147839
Join Date: May 2007
Chapter/Region: MAIC
Location: MD
Vehicle:
2003 WRX
SRP

Default

Thanks for the heads up!

Judging by the approximate peak of that 279ft-lb run (maxes out around 5252 RPM) and your 354wtq estimate, I'd be making about 354awhp per stock transmission....woah. Even on a Dynojet, thats a solid number.
RossLH is offline   Reply With Quote
Old 05-25-2009, 12:06 AM   #9
MFactory
Vendor
 
Member#: 158608
Join Date: Sep 2007
Chapter/Region: RMIC
Location: Centerville, UT
Default

Gearing/Torque Multiplication only changes the torque produced to the ground. It does not affect your horsepower (which is an engine measurement). Your would still be making 300whp.
MFactory is offline   Reply With Quote
Old 05-25-2009, 12:09 AM   #10
RossLH
Scooby Specialist
 
Member#: 147839
Join Date: May 2007
Chapter/Region: MAIC
Location: MD
Vehicle:
2003 WRX
SRP

Default

Quote:
Originally Posted by MFactory View Post
Gearing/Torque Multiplication only changes the torque produced to the ground. It does not affect your horsepower (which is an engine measurement). Your would still be making 300whp.
Interesting. If horsepower is derived from torque, how can torque change while horsepower stays the same? (Not trying to argue, just curious.)
RossLH is offline   Reply With Quote
Old 05-25-2009, 12:15 AM   #11
MFactory
Vendor
 
Member#: 158608
Join Date: Sep 2007
Chapter/Region: RMIC
Location: Centerville, UT
Default

Engine torque doesn't change. It is the torque that is put to the ground that changes. Your transmission is basically a torque converter.

You're engine is making 279lbft peak just now. On assumption that you are running a 3.9 Final Drive, you would actually be putting down 1347lbft peak to the ground.

i.e 1.238 (4th) x 3.9 (FD) x 279lbft = 1347lbft to the ground.

0.972 (stock 4th) x 3.9 (FD) x 354lbft = 1341lbft to the ground.

Put it this way, a stock WRX only has 217lbft engine torque. If the engine to ground ratio was only 1:1 (as a dyno will show), you could have several friends push your car faster than the car could accelerate.
MFactory is offline   Reply With Quote
Old 05-25-2009, 12:22 AM   #12
RossLH
Scooby Specialist
 
Member#: 147839
Join Date: May 2007
Chapter/Region: MAIC
Location: MD
Vehicle:
2003 WRX
SRP

Default

Ah, that makes sense. Thanks for the information!
RossLH is offline   Reply With Quote
Old 05-25-2009, 12:56 AM   #13
sidewayz
Scooby Specialist
 
Member#: 5810
Join Date: Apr 2001
Chapter/Region: Tri-State
Location: Easton PA
Vehicle:
2001 S366 2.5RS

Default

holy crap they need to relax with the dyno brakes..
sidewayz is offline   Reply With Quote
Old 05-26-2009, 12:54 AM   #14
MFactory
Vendor
 
Member#: 158608
Join Date: Sep 2007
Chapter/Region: RMIC
Location: Centerville, UT
Default

RossLH - Here's something you might like:

MFactory is offline   Reply With Quote
Old 05-26-2009, 10:43 AM   #15
zeropsi
*** Banned ***
 
Member#: 175453
Join Date: Mar 2008
Chapter/Region: MWSOC
Location: wilCO, IL
Vehicle:
AE86 GT-S coupe
i <3 alqonquin homosauce

Default

Quote:
Originally Posted by MFactory View Post
Dyno numbers are good to give you a rough idea of what sort of power your engine is making and, of course, as a tuning tool.

What really matters though is what power (torque) your car is putting to the ground, as a dyno is not calibrated to measure that (dynos are calibrated to show a 1:1 ratio). You actually make 22% more torque in 3rd gear and 27% more torque in 4th gear (throughout the full rev range, not just peak), than if you were using your stock transmission.

To put this into perspective, the 279lbft peak you are making on your car just now is equal to a car that is making 354lbft peak that is running on a stock transmission.

Just some food for thought, as not everyone understands the torque multiplication aspect of changing your gears
That's what I miss about my MFactory setup.

I could definitely feel it too. The car felt way crazier with the 5-speed.

Quote:
Originally Posted by MFactory View Post
Engine torque doesn't change. It is the torque that is put to the ground that changes. Your transmission is basically a torque converter.

You're engine is making 279lbft peak just now. On assumption that you are running a 3.9 Final Drive, you would actually be putting down 1347lbft peak to the ground.

i.e 1.238 (4th) x 3.9 (FD) x 279lbft = 1347lbft to the ground.

0.972 (stock 4th) x 3.9 (FD) x 354lbft = 1341lbft to the ground.

Put it this way, a stock WRX only has 217lbft engine torque. If the engine to ground ratio was only 1:1 (as a dyno will show), you could have several friends push your car faster than the car could accelerate.
Nice.

Nice graph too.
zeropsi 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
IPS Motorsports Dyno Jet pannell77 Proven Power Bragging 22 10-06-2010 01:33 AM
Pics from Dyno Day 10/3/09 @ Akuma Motorsports! AkumaMotorsports Tri-State Area Forum 8 10-05-2009 05:19 PM
Dyno results from IPS Motorsports Dyno Day event pannell77 Mid West Subaru Owners Club Forum -- MWSOC 7 05-26-2009 11:05 PM
Verocious Motorsports Dyno Day - 4/25/09 Verocious Mid Atlantic Impreza Club -- MAIC 21 04-23-2009 10:53 PM
Slowmotion Motorsports dyno day. Oct 23 99WRXEJ20 Mid West Subaru Owners Club Forum -- MWSOC 1 10-13-2005 09:38 AM


All times are GMT -4. The time now is 02:20 PM.


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.