Welcome to the North American Subaru Impreza Owners Club Thursday January 29, 2015
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 05-29-2003, 08:29 PM   #1
imprezey
Scooby Newbie
 
Member#: 17178
Join Date: Apr 2002
Location: palo alto, ca
Vehicle:
2001 2.5RS Coupe
Silverthorn Metallic

Default lightweight crank pulley or lw flywheel?

looking to do one of these mods soon. which one should it be or is it alright to do both?
* Registered users of the site do not see these ads.
imprezey is offline   Reply With Quote
Old 05-29-2003, 09:57 PM   #2
ciper
Scooby Guru
 
Member#: 15543
Join Date: Feb 2002
Location: san francisco, ca
Vehicle:
90BJ Legacy LS ABS
AWD 946 Rio Red Jpn built

Default

Think about it this way, the flywheel needs quite a bit of work. Might as well do other things at the same time. Lightened pulley is fairly simple, remove rad fans, remove drive belts, remove pulley.
ciper is online now   Reply With Quote
Old 05-29-2003, 10:53 PM   #3
linsavy
Scooby Specialist
 
Member#: 11620
Join Date: Oct 2001
Location: Ontario
Vehicle:
1997 GF4-STiV3 clone

Default

True the pulley is simple to install. The flywheel will yield better results due to the greater weight savings and about 4x the cost.
Also the lack of a weighted crank pulley to absorp harmonics can cause earlier valve float and undesirable valve control. Subies suffer less from this but it is still there. Noone has had their engine blow up so it is likely ok.
I have a light pulley which I put in recently. It is very noticeable in how quickly the engine revs when you blip the throttle.
If I go with a light flywheel, I will remove the pulley to make street launches friendly and save stress on the crank.
linsavy is offline   Reply With Quote
Old 05-30-2003, 01:21 AM   #4
imprezey
Scooby Newbie
 
Member#: 17178
Join Date: Apr 2002
Location: palo alto, ca
Vehicle:
2001 2.5RS Coupe
Silverthorn Metallic

Default

alright. so i think the general consensus is a lw flywheel. i know its more work but i'll be putting in a new clutch soon as well so i can do it at the same time.
imprezey is offline   Reply With Quote
Old 05-30-2003, 01:34 AM   #5
Boxologist
Scooby Guru
 
Member#: 21118
Join Date: Jul 2002
Chapter/Region: Tri-State
Location: LI, NY
Default

had a lightened pulley put on over the weekend. very nice addition. pulls faster after 2.5k to redline. a flywhel is a lot of wok, and i have heard people regret having it put on because it ruins highway cruising.
Boxologist is offline   Reply With Quote
Old 05-30-2003, 01:39 AM   #6
imprezey
Scooby Newbie
 
Member#: 17178
Join Date: Apr 2002
Location: palo alto, ca
Vehicle:
2001 2.5RS Coupe
Silverthorn Metallic

Default

Quote:
Originally posted by Boxologist
had a lightened pulley put on over the weekend. very nice addition. pulls faster after 2.5k to redline. a flywhel is a lot of wok, and i have heard people regret having it put on because it ruins highway cruising.
how does it ruin highway driving? i heard that it makes stop and go driving a bit more difficult. i dont mind the extra work to put it in because i have to do the clutch too but i wouldnt mind doing pulley(s) either. so which one should i do because i dont think i want to do both.
imprezey is offline   Reply With Quote
Old 05-30-2003, 02:54 AM   #7
Folklorez
Scooby Specialist
 
Member#: 1837
Join Date: Jul 2000
Chapter/Region: MWSOC
Location: @ WORK [3rd Shift]
Vehicle:
2000 Impreza RS -BRP
-90Accord

Default

i would do the flywheel. if your gonna be working on the clutch might as well change the flywheel.

Folklorez is offline   Reply With Quote
Old 05-30-2003, 03:36 AM   #8
Kostamojen
Scooby Guru
 
Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: haha XD
Vehicle:
2013 Subaru 599 :P
Galaxy Blue Sexy

Default

I would do both. Just not get one of the super-light flywheels and instead get a 13-15lbs one (which is plenty anyhow)

I definatly noticed a difference with my pulley and I wouldnt take it off for anything (exept if I sold the car )
Kostamojen is offline   Reply With Quote
Old 05-30-2003, 03:37 AM   #9
imprezey
Scooby Newbie
 
Member#: 17178
Join Date: Apr 2002
Location: palo alto, ca
Vehicle:
2001 2.5RS Coupe
Silverthorn Metallic

Default

yeah but i also dont want to lose driveability. People with lw flywheels, is it really that much harder to drive in stop and go traffic? i assume it isnt but just how much harder is it? also, i could justify spending 120 on a crank pulley but maybe not 400 on a flywheel? well actually i could.. haha but you get the point.
imprezey is offline   Reply With Quote
Old 05-30-2003, 04:48 AM   #10
joefocker20
Scooby Specialist
 
Member#: 13745
Join Date: Dec 2001
Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2004 STI
Silver

Default

I have a lw crank pulley and I'm going to be installing a Exedy Clutch and 13lb flywheel tomorrow. I'll let you know how it goes. Just do both if you can.
joefocker20 is offline   Reply With Quote
Old 05-30-2003, 06:34 PM   #11
imprezey
Scooby Newbie
 
Member#: 17178
Join Date: Apr 2002
Location: palo alto, ca
Vehicle:
2001 2.5RS Coupe
Silverthorn Metallic

Default

sweet. let me know how it goes!
imprezey is offline   Reply With Quote
Old 06-01-2003, 05:40 AM   #12
joefocker20
Scooby Specialist
 
Member#: 13745
Join Date: Dec 2001
Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2004 STI
Silver

Default

Well it took me 9 hours to install it. I haven't really gotten on it hard yet, but the flywheel makes a pretty decent difference in acceleration, mainly in the lower gears.
joefocker20 is offline   Reply With Quote
Old 06-01-2003, 11:43 AM   #13
Impreza2000
Scooby Newbie
 
Member#: 36971
Join Date: May 2003
Vehicle:
2000 RS
silverthorn

Default

I've had GFB pulleys and aluminum flywheel in for over a year and I love them. Car stutters more in stop and go but not enough to worry about. The flywheel made the biggest difference of all mods(intake, exhaust, etc..)
Impreza2000 is offline   Reply With Quote
Old 06-01-2003, 04:03 PM   #14
imprezey
Scooby Newbie
 
Member#: 17178
Join Date: Apr 2002
Location: palo alto, ca
Vehicle:
2001 2.5RS Coupe
Silverthorn Metallic

Default

what do you mean by the car stutters in stop and go driving? is it sorta like hesitation or something else? im thinking i just might go with the flywheel instead of both.
imprezey is offline   Reply With Quote
Old 06-01-2003, 04:07 PM   #15
joefocker20
Scooby Specialist
 
Member#: 13745
Join Date: Dec 2001
Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2004 STI
Silver

Default

By stuttering, I think he means how the revsdrop so quickly when you start off in first if you dont have the revs high enough..
joefocker20 is offline   Reply With Quote
Old 06-02-2003, 12:15 AM   #16
imprezey
Scooby Newbie
 
Member#: 17178
Join Date: Apr 2002
Location: palo alto, ca
Vehicle:
2001 2.5RS Coupe
Silverthorn Metallic

Default

i think i understand. how is the combo going for you? are you getting the stuttering as well?
imprezey is offline   Reply With Quote
Old 06-02-2003, 05:01 AM   #17
joefocker20
Scooby Specialist
 
Member#: 13745
Join Date: Dec 2001
Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2004 STI
Silver

Default

Actually I didnt. I broke it in today and decided to do some runs at the "track". I pulled hard on a stock WRX until 70mph, and beat up on countless Hondas, and various other cars. The only thing that sucks is learning to launch the car well.. I'm debating on Cams and Nitrous now, or turboing my car. Its a hard decision, but if I turbo it, it will take ALOT more cash to do it the way I want to.
joefocker20 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
Lightweight crank pulley + Lightweight Flywheel. OK or Not ? jobxiii Built Motor Discussion 39 05-20-2009 06:25 PM
Light flywheel w/ lightweight crank pulley problems? sabingr North West Impreza Club Forum -- NWIC 7 12-29-2008 09:05 PM
wtb--new or used COBB lightweight crank pulley--BLUE skate enjoi Private 'Wanted' Classifieds 8 08-19-2008 10:51 AM
Lightweight crank pulley and flywheel question GochYou Transmission (AT/MT) & Driveline 5 03-09-2008 08:19 AM
wtb: perrin or cobb lightweight crank pulley 04silv3rSTI Private 'Wanted' Classifieds 0 03-14-2007 12:29 AM


All times are GMT -4. The time now is 07:18 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.