Welcome to the North American Subaru Impreza Owners Club Wednesday August 20, 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 09-25-2004, 08:50 AM   #1
kevin2.5rs
Scooby Specialist
 
Member#: 67518
Join Date: Aug 2004
Chapter/Region: NESIC
Location: Bean town
Vehicle:
2013 Focus ST
TB

Default weight reduction

What kind of benifits are there with a lighter car?
How much weight must be removed to feel a diference?
* Registered users of the site do not see these ads.
kevin2.5rs is offline   Reply With Quote
Old 09-25-2004, 09:17 AM   #2
sixpack subaru
*** Banned ***
 
Member#: 64974
Join Date: Jun 2004
Location: My Shed, Melbourne, Australia
Vehicle:
1995 WRX,APEXi,HKS,$
Faded, Stonechipped Red

Default

Go down the drags, do a run with every thing as is....
Then, while you are there, remove Pass seat, rear seat, washer bottle, spare wheel/Jack etc etc etc etc and see how much faster you go..........


Alterantively, drill holes in EVERYTHING, Except brake and Fuel Lines!! LOLOL


Sixpack Subaru
sixpack subaru is offline   Reply With Quote
Old 09-25-2004, 10:18 AM   #3
Kevin Thomas
Street Racing Instructor
Moderator
 
Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

Default

Quote:
Originally Posted by kevin2.5rs
What kind of benifits are there with a lighter car?
How much weight must be removed to feel a diference?

Go to this 1/4 Mile Calculator

1) Type in your vehicle's weight (with you in it).
1a: If you don't know your vehicle's weight with you in it, assume a weight (Ex: 3100lbs).

2) Type in the horsepower you car makes. If you don't know the horsepower, type in the horsepower you think your car makes (Ex: 165hp).

3) Press the 'Calculate ET (Elapse Time)' button.

4) Observe results

5) Repeat step #1 with a different weight and/or horsepower and continue.
Kevin Thomas is offline   Reply With Quote
Old 09-25-2004, 10:26 AM   #4
nySulli
Scooby Specialist
 
Member#: 32617
Join Date: Feb 2003
Chapter/Region: Tri-State
Location: NY
Vehicle:
2008 STi
DGM

Default

F = M * A

the force will remain the same if your just removing weight, but with less mass, you obviously have faster acceration, goes for handling, braking, 1/4 mile times

aside from that, depending on where you lose the weight you can end up with a better weight distribution, losing unspring weight (anything in the suspension that moves with the wheels up and down, this can really benefit your handling by ensuring the tires spend as much time as possible planted on the pavement doing what their suposed to do

theres more benefits, but really less weight can really make a huge difference in how your car handles, good places to start are with the battery, even possibly relocating it to the trunk for better weight distribution, pulley's, flywheel will help put a little more power to the ground dropping the drivetrain losses, past that your mostly talking about removing stuff, and going with lightweight body panels, but that can get pricy
nySulli is offline   Reply With Quote
Old 09-25-2004, 10:56 AM   #5
Kevin Thomas
Street Racing Instructor
Moderator
 
Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

Default

Quote:
Originally Posted by kevin2.5rs
How much weight must be removed to feel a diference?
50lbs if you are a professional driver. 100lbs if you are not.

Rotational weight: You will feel a difference with 3lbs or more removed.
Kevin Thomas is offline   Reply With Quote
Old 09-25-2004, 12:52 PM   #6
White 2.5rs
Scooby Guru
 
Member#: 39936
Join Date: Jul 2003
Vehicle:
99RS TWE&SCAT EJ257
Hydra+HMist+PPG+35R=DEATH

Default

yeah im doing bumper beams i did the front and im doing the rear, thats like 100 lbs! but im also 100x more likely to die in a wreck, oh man
White 2.5rs is offline   Reply With Quote
Old 09-25-2004, 04:49 PM   #7
Jejunum
Scooby Specialist
 
Member#: 15773
Join Date: Feb 2002
Chapter/Region: MWSOC
Location: Madison
Vehicle:
2011 Impreza WRX
Silver

Default

Quote:
Originally Posted by White 2.5rs
yeah im doing bumper beams i did the front and im doing the rear, thats like 100 lbs! but im also 100x more likely to die in a wreck, oh man

oh man, thats funny. i was drinking a pop and almost spit it all over the screen after reading that.

Jejunum is offline   Reply With Quote
Old 09-25-2004, 07:14 PM   #8
White 2.5rs
Scooby Guru
 
Member#: 39936
Join Date: Jul 2003
Vehicle:
99RS TWE&SCAT EJ257
Hydra+HMist+PPG+35R=DEATH

Default

heh well its true
also i found ut taht the rear is only 34 lbs, making it about 30 lbs lighter w/ the new rear beam, not bad but not tha tmuch
White 2.5rs is offline   Reply With Quote
Old 09-25-2004, 08:41 PM   #9
Kostamojen
Scooby Guru
 
Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: haha XD
Vehicle:
2013 Subaru 599 :P
Galaxy Blue Sexy

Default

Quote:
Originally Posted by White 2.5rs
yeah im doing bumper beams i did the front and im doing the rear, thats like 100 lbs! but im also 100x more likely to die in a wreck, oh man
Not really, considering those bumper beams are stock on some of the old jdm cars.
Kostamojen is offline   Reply With Quote
Old 09-25-2004, 09:16 PM   #10
Bussman61
Scooby Newbie
 
Member#: 32612
Join Date: Feb 2003
Chapter/Region: RMIC
Location: Colorado
Vehicle:
1996 SVX
Laguna Blue

Default

Quote:
Originally Posted by Kevin Thomas

If that thing is correct....

My poor car
Bussman61 is offline   Reply With Quote
Old 09-25-2004, 10:01 PM   #11
Defiantguy
Scooby Newbie
 
Member#: 41268
Join Date: Aug 2003
Chapter/Region: South East
Location: Sarasota, FL
Vehicle:
2015 WRX
Silver

Default

according to that, if you can run a 14.9 in the quarter mile with a 150lb driver your RS has about 229hp. Right...
Defiantguy is offline   Reply With Quote
Old 09-25-2004, 11:22 PM   #12
Kostamojen
Scooby Guru
 
Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: haha XD
Vehicle:
2013 Subaru 599 :P
Galaxy Blue Sexy

Default

1/4 mile calculators never work.
Kostamojen is offline   Reply With Quote
Old 09-26-2004, 01:30 AM   #13
greg donovan
Scooby Specialist
 
Member#: 60743
Join Date: Apr 2004
Chapter/Region: MWSOC
Location: Fargo, ND
Vehicle:
'95 Impreza L
dirty and on jack stands

Default

just removing the rear seats and the interior of the trunks and the spare and jack and package tray of my sedan i noticed the difference. that carpet is heavy in the trunk.

for an easy experiment add wieght and see what happens. the amount it would take to notice would be very close to the amount you would need to loose i would think.
greg donovan is offline   Reply With Quote
Old 09-26-2004, 02:13 AM   #14
rawrFERNY
Scooby Specialist
 
Member#: 51517
Join Date: Dec 2003
Chapter/Region: SCIC
Location: Burbank
Vehicle:
2007 Outlander LS
Blue

Default

rawrFERNY 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
Total weight reduction or F/R weight distribution more valuable? soslow General Community 17 12-11-2007 12:40 AM
('93-'01) Weight Reduction Questions subarumantoo Impreza Forum 5 05-01-2001 11:02 AM
Some interesting facts about weight reduction Imprezer WRX Forum Archive 5 02-25-2001 10:33 PM
2.5RS Weight Reduction info and questions. Frank General Forum Archive 21 02-16-2001 12:53 AM


All times are GMT -4. The time now is 03:53 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.