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 04-24-2001, 07:04 PM   #1
96Lconversion
Scooby Specialist
 
Member#: 3604
Join Date: Jan 2001
Chapter/Region: NESIC
Vehicle:
2008 Infiniti G35S
2005 S2000

Post Opinions on Lightweight Flywheels for an everyday driver

So what does everyone think? I did a search, ddn't turn up what I was looking for. Are they to light? Drop revs too fast? Would a short shift kit be needed? How much more power would be sent to the wheels if any, and how much would accerleration times improve? Thanks for the help!!
* Registered users of the site do not see these ads.
96Lconversion is offline   Reply With Quote
Old 04-24-2001, 11:34 PM   #2
BongMan
Scooby Specialist
 
Member#: 2399
Join Date: Sep 2000
Location: fremont, in the bay man
Vehicle:
2001 Impreza RS
Blue

Post

It helps on acceleration, but it's loud. kind of like an intake but helps the whole power band. i guess revs drop faster, but a short shifter isn't really needed. also if you miss a shift and rev the engine/flywheel too much you'll blow up the tranny.

I honestly think it's a good mod but hard to do because it's pretty internal. ok have fun
BongMan is offline   Reply With Quote
Old 04-25-2001, 05:49 AM   #3
Bottom Feeder
Scooby Specialist
 
Member#: 2808
Join Date: Nov 2000
Chapter/Region: MAIC
Location: Occupied Virginia
Question

Hey BongMan- You'd better lay off the buds before you start giving out advice.
What the hell does a lightened flywheel have to do with how loud an engine is? Answer: not a damn thing. And a short shifter is a completely separate part, so installing a lightened flywheel does not make a short shifter unnecessary.
Where do some of you guys get this stuff?

[This message has been edited by Bottom Feeder (edited April 25, 2001).]
Bottom Feeder is online now   Reply With Quote
Old 04-25-2001, 10:17 AM   #4
BongMan
Scooby Specialist
 
Member#: 2399
Join Date: Sep 2000
Location: fremont, in the bay man
Vehicle:
2001 Impreza RS
Blue

Post

My buddy has a lighten fly wheel and it sounds hella load. Perhaps that has nothing to do with the engine directly but that noise is still there. Maybe he should change is fluid but that thing makes hella noise.

Bottom Feeder: You seem to be really helpful with your responce. Do you have a fly wheel? Does it seem quiter than stock?

If the answer is yes to both of these i bet your flywheel is heavier. Regardless you haven't brought anything new to this discusion.

Jeez the nerve of some people.
BongMan is offline   Reply With Quote
Old 04-25-2001, 10:39 AM   #5
subarumantoo
Scooby Specialist
 
Member#: 3257
Join Date: Dec 2000
Location: Houston, TX
Vehicle:
2000 ImprezaRS
Blue Ridge Pearl

Post

A lightened flywheel will allow the engine to accelerate more quickly. This of course translates into the vehicle accelerating faster as well. It can cause more engine braking under decelleration because the rotating mass is reduced which allows the engines commpression to be transfered to the wheels more redily. As far as it sounding different, no, it makes no difference what so ever. I am about to purchase the chrome molly 12lb. flywheel from JCSports that is made by N1. Also keep in mind that it takes weight off of the vehicle as well. 13lbs. lighter is 13lbs. lighter! The factory flywheel weighs about 25lbs.
subarumantoo is offline   Reply With Quote
Old 04-25-2001, 10:41 AM   #6
smacksube
Scooby Specialist
 
Member#: 4067
Join Date: Feb 2001
Vehicle:
01 2.5 rs
silver

Post

the flywheel really smoothes out the power band. My friend has a turboed integra ls and before he got the flywheel in you'd kinda feel an extra surge when the turbo spooled up, but now it's just a really smooth rev. I drove it and it feels the same to me actually. However the lightest flywheel I've seen for the impreza was 11 lbs and his is 7 lbs, so it probably couldn't be worse
smacksube is offline   Reply With Quote
Old 04-25-2001, 02:04 PM   #7
Cacophony
Scooby Newbie
 
Member#: 213
Join Date: Aug 1999
Location: Philly, PA
Vehicle:
2004 Mazda RX-8
Black

Post

Hey. I've got an unorthodox racing 11lb flywheel in my car. And yes, it does make a little more noise than stock.. but it really can't be compared to the noise of an intake.. It's just a small increase in mechanical noises, more along the lines of harder engine/tranny mounts.

As far as being good in a daily driver, they certainly don't allow you to be lazy. If you're lazy, it'll make you look clueless with a manual tranny. And if you like taking your scoob out to thrash in the snow, then don't get an 11lb flywheel. I had to brutalize my act clutch this winter to get my RS moving in heavy snow. I don't think I'll be putting in as light of a flywheel on my STi motor
Cacophony is offline   Reply With Quote
Old 04-25-2001, 02:48 PM   #8
BongMan
Scooby Specialist
 
Member#: 2399
Join Date: Sep 2000
Location: fremont, in the bay man
Vehicle:
2001 Impreza RS
Blue

Thumbs up

So let me recap what people have said.

One person is about to add a light flywheel to their car and says it won't make a difference.

Then someone else says that his buddy's turbo integ flywheel didn't seem to make that much more noise. However i'd say you couldn't hear the flywheel noise between the turbo or the BOV.

The last guy says that his impreza's flywheel sounded a somewhat louder.

Then OG bottom feeder says hay that has nothing to do with engine noise. Well then intakes shouldn't make noise either than huh?

To summarize I'd say bottom feeder needs to smoke some buds and prehaps listen to a impreza with at light flywheel before acting like an expert.

[This message has been edited by BongMan (edited April 25, 2001).]
BongMan is offline   Reply With Quote
Old 04-25-2001, 03:23 PM   #9
Bottom Feeder
Scooby Specialist
 
Member#: 2808
Join Date: Nov 2000
Chapter/Region: MAIC
Location: Occupied Virginia
Post

Kinda sounds like the Chewbacca Defense.
Are you serious?
Bottom Feeder is online now   Reply With Quote
Old 04-25-2001, 04:31 PM   #10
ImprezaRS dot com
over boosted again
Moderator
 
Member#: 1458
Join Date: May 2000
Chapter/Region: RMIC
Location: Colorado Springs CO USA
Vehicle:
2015 Forester 2.0 XT
2005 2.5 RS, 2013 Tribeca

Post

I always wondered what the Chewbaca defense was - someone clue me in on this (yes, I've seen all the star wars)


My ACT clutch is louder than stock, and was installed at the same time as the JC Sports flywheel. I wonder if that is what is actually noisier for the other people, the clutch not the flywheel.

Now, about the short shifter. I did the SYMS short shifter and it does make a nice difference, and it isn't even any louder

However, the STI tranny mounts help shifting even more, as did the motor mounts that I did later, since the tranny is now rock solid and not moving about between shifts.

Larry www.ImprezaRS.com
ImprezaRS dot com is offline   Reply With Quote
Old 04-25-2001, 04:40 PM   #11
CosmoTheCat
Scooby Newbie
 
Member#: 3409
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Woolley
Vehicle:
1998 Ram 2500
Green.

Post

My Kartboy shifter is louder than stock.
*snick snick* as I run through the gears.

I can understand how a rotating mass can make noise though. If it's harder, got a different cut to the edge, has different holes, whatever... it'll make different noises. And there isn't as much mass to muffle the noises either. But I haven't driven one, or ridden in one, so I don't really know fo sho.
CosmoTheCat is offline   Reply With Quote
Old 04-25-2001, 04:57 PM   #12
ColinL
Scooby Guru
 
Member#: 114
Join Date: Jul 1999
Chapter/Region: MWSOC
Location: Wichita, KS and Whoring, OT
Vehicle:
'03 Evo, Rice White
'01 Erion CBR 929

Post

larry,

the chewbacca defense comes from an older episode of SouthPark. basically it is a spoof on Johnny Cochran's "if the glove does not fit, you must acquit" from OJ's murder trial. anyway, the SP version is of course ludicrous and involves the following logic: "is Chewbacca a wookie?" (yes) "if Chewbacca is a wookie, then you must acquit." And naturally, the jury falls for it.

Our catfish friend here is trying to say that the argument or reasoning is unsound.

[This message has been edited by ColinL (edited April 25, 2001).]
ColinL is offline   Reply With Quote
Old 04-25-2001, 06:01 PM   #13
Rich L
Scooby Specialist
 
Member#: 961
Join Date: Feb 2000
Chapter/Region: Tri-State
Location: near Atco(NJ) 13.566@100.64-
Vehicle:
1999 RS-Tw/ CobraMAF
Custom Rallispec kit/IC#1

Post

96Lconversion
The lighter flywheel is a great mod.
Its similar the pully mod except it actually works!

Alot of ppl like to think that the pulley mod is worthwhile, but I disagree.
The flywheel mod is a different story and is big reason why I was able to pull off a 13.7@98.55mph run at only 6psi of boost.

I would recommend a 13lb chrome molly flywheel. You'll notice the engine rev up and down quicker... But it is alot easier to stall the car. (a short throw shifer is not necessary)

To give you an idea. I never once stalled the car with the stock heave 26lb flywheel(in 2.5 yrs).
Since about Jan... I stalled my car 4 times (all times while going reverse)

Under 13lbs and you better avoid stop and go traffic. Of course this is my own subjective opinion.

Good luck
Rich L is offline   Reply With Quote
Old 04-25-2001, 06:53 PM   #14
96Lconversion
Scooby Specialist
 
Member#: 3604
Join Date: Jan 2001
Chapter/Region: NESIC
Vehicle:
2008 Infiniti G35S
2005 S2000

Post

People, please stick to the topic, I don't car WHAT noise a lighter flywheel makes, I want to know if it is a pain in a car used as a daily driver. Cacophony, Rich L, thanks for the info.

[This message has been edited by 96Lconversion (edited April 25, 2001).]
96Lconversion is offline   Reply With Quote
Old 04-25-2001, 08:14 PM   #15
efoo
Scooby Specialist
 
Member#: 80
Join Date: Jul 1999
Post

well, noise *is* one of the factors that makes a car a daily driver or not, at least in my opinion.

but anyways, what Rich L said. especially since he has (what used to be) my flywheel. do a search on Exedy flywheels and you'll see my impressions of that 13lb flywheel.

noise-wise, yes, there *is* some addl. noise. the engine revs up much faster and so you just hear more engine noise more quickly. there is a slightly more metallic sound to it which is hard to describe unless you've heard it yourself. it didn't bother me while i had the lightened flywheel in my NA 2.5RS though. now that I have a turbo in the car and use a turbo tranny and STi flywheel that still weighs about 15 lbs, I still feel that the lightened flywheel is a big part of what makes my car fun to drive.

but you do have to drive it more. stop and go traffic makes your left foot a bit tired after a while. caveat emptor.

-Edwin
efoo is offline   Reply With Quote
Old 04-25-2001, 08:30 PM   #16
BongMan
Scooby Specialist
 
Member#: 2399
Join Date: Sep 2000
Location: fremont, in the bay man
Vehicle:
2001 Impreza RS
Blue

Cool

I told you so.
HAa haa
BongMan is offline   Reply With Quote
Old 04-25-2001, 08:41 PM   #17
efoo
Scooby Specialist
 
Member#: 80
Join Date: Jul 1999
Post

uh...

efoo is offline   Reply With Quote
Old 04-25-2001, 08:45 PM   #18
Captain Ding
Scooby Newbie
 
Member#: 5773
Join Date: Apr 2001
Location: Allentown, PA, USA
Vehicle:
2003 Forester XS
Pacifica Blue

Post

I think Cacophony is right on the money. I have an Unorthodox Flywheel which weighs 12 or 13 lbs on my daily driver. The difference in acceleration at low speeds is very noticeable. As far as driveability goes, it just takes a little bit more concentration to get going from a standing start, especially in stop-and-go traffic or on hills. After a couple of days with it, you will have no problem. Revs drop a lot quicker, so it will definitely change your shifting habits, especially when the A/C compressor turns on. The benefit (faster shifts, easier heel/toe downshifts, faster acceleration at low speeds) far outweigh any negative points. As far as noise, there's a slight metallic sound if you are standing by the hood of the car while it is idling, but I've never heard much noise while actually driving.
Captain Ding is offline   Reply With Quote
Old 04-25-2001, 10:54 PM   #19
96Lconversion
Scooby Specialist
 
Member#: 3604
Join Date: Jan 2001
Chapter/Region: NESIC
Vehicle:
2008 Infiniti G35S
2005 S2000

Post

Hey guys, all this info is great, I really appreciate it. I am sometimes a very lazy driver, would I have to be really careful all the time or would I just get used to it? Does anyone make a 15 or 16lb-er?? I wish they had ajustable flywheels , 11-25lb setting!! that would be nice!
96Lconversion is offline   Reply With Quote
Old 04-26-2001, 01:56 AM   #20
Bottom Feeder
Scooby Specialist
 
Member#: 2808
Join Date: Nov 2000
Chapter/Region: MAIC
Location: Occupied Virginia
Question

*sigh*
If you say so...
Bottom Feeder is online now   Reply With Quote
Old 04-26-2001, 06:16 AM   #21
pottsie350
Scooby Newbie
 
Member#: 6110
Join Date: Apr 2001
Location: Lonaconing, MD USA
Vehicle:
98 Impreza L
Red

Question

How much would a lighter flywheel effect traction in snowy/loose gravel conditions? Or is a lighter flywheel just best suited to road use?
pottsie350 is offline   Reply With Quote
Old 04-26-2001, 12:51 PM   #22
CosmoTheCat
Scooby Newbie
 
Member#: 3409
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Woolley
Vehicle:
1998 Ram 2500
Green.

Post

pottsie - With the lightweight flywheel you would have to feather the clutch more to get started in slick conditions. Because it is easier to stall (less rotating mass helping you out) it takes a little more work (and a little more riding on the left foot). Once you are under way I wouldn't think there would be too much difference. Maybe go easy when getting on or off the gas though.
CosmoTheCat is offline   Reply With Quote
Old 04-26-2001, 05:37 PM   #23
pottsie350
Scooby Newbie
 
Member#: 6110
Join Date: Apr 2001
Location: Lonaconing, MD USA
Vehicle:
98 Impreza L
Red

Smile

Thanks, I really like driving in the gravelly greasy stuff. If it mostly effects low speed operation and stalling, then I should be alright. I ride dirt bikes a lot, and I know when you lighten a flywheel on the scooters, it can really make them difficult in the soupy stuff. But then again I'm only going 5~10 mph through the woods on the bike, vs 30 to 100 on gravelly/snowy roads in the car.
pottsie350 is offline   Reply With Quote
Old 04-27-2001, 07:12 AM   #24
Rich L
Scooby Specialist
 
Member#: 961
Join Date: Feb 2000
Chapter/Region: Tri-State
Location: near Atco(NJ) 13.566@100.64-
Vehicle:
1999 RS-Tw/ CobraMAF
Custom Rallispec kit/IC#1

Exclamation

96Lconversion

I wouldnt worry about any increase in noise created by the flyheel. Usually 10 out of 10 times, by the time you swap flywheels you have already done other "noisier" mods!
Like intake and exhaust.

My car is so dam loud now with an upgraded intake, headers, and Supertrapp mufflers...
I can have 4 bad wheel barings and I would never know! So dont worry about flywheel noise. Its a good mod.

Rich L is offline   Reply With Quote
Old 04-27-2001, 11:52 AM   #25
deepbeep
Scooby Specialist
 
Member#: 1392
Join Date: Apr 2000
Location: Oakland, CA
Post

Does anyone run this HKS clutch/flywheel combo?


http://www.maxpower.co.uk/products/p...?idArticle=589
deepbeep 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
Opinions on lightweight batteries only1agam Electrical & Lighting 8 12-11-2006 03:31 PM
Best modes for a everyday driver for about 2 grand mjjantz General Community 15 04-23-2005 05:59 PM
lightweight flywheel without an uber-clutch? alacrity024 Transmission (AT/MT) & Driveline 10 12-14-2004 06:41 AM
Used Exedy lightweight flywheel for an 02-03 WRX BLUETURBOWRX Private 'For Sale' Classifieds 12 09-17-2003 08:16 PM
opinions on Sequential Turbochargers for an Impreza FuJi K Normally Aspirated with bolt-on Forced Induction Powertrain 30 11-07-2001 02:44 PM


All times are GMT -4. The time now is 01:23 PM.


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.