evolutionm.net - Home of the Lancer Evolution
Home Features Community Marketplace Registry Garage Store

Go Back   evolutionm.net > Lancer Evolution X Forums > Evo X Engine / Turbo / Drivetrain
Sign in using an external account
Register Forgot Password?
Register Photos FAQ Members Calendar Search Today's Posts Mark Forums Read Used CarsGarageVendor Directory
Search


Evo X Engine / Turbo / Drivetrain Everything from engine builds to the best clutch and flywheel.

Welcome to EvolutionM.net!
Welcome to EvolutionM.net.

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, at no cost, 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!


Reply
 
 
 
 
Thread Tools Search this Thread
Old Dec 28, 2008, 10:05 PM   #1
Evolved Member
Personal Sales Rating: (4)
Garage is empty, add now
 
Joe's Evo X's Avatar
 
Join Date: Mar 2008
Location: Alamogordo, NM
Posts: 701

Drives: Evolution X, Kawasaki Ninja zx10r 2006

What are the advantage and disadvantage of a light weight flywheel

So I was thinking of getting a light weight flywheel with my new clutch and was just wondering the advantage and disadvantage thanks.
__________________
CURRENT MODS
DTM FMIC
DTM DOMINATOR 2 TURBO
DTM LICP
AQUAMIST METH KIT HFS-1
U-R DOWN PIPE
U-R TEST PIPE
U-R CAT BACK EXHAUST
U-R UICP
AMS COLD AIR INTAKE
AMS SHIFTER BUSHINGS
GREDDY PROFEC B SPEC II EBC
GREDDY TURBO TIMER
MEGAN COILOVERS
EXEDY TWIN DISK CLUTCH
AEM WIDEBAND GAUGE
430AWHP/360 AWTQ ON MD @ 27PSI
Offline
 
Reply With Quote
Old Dec 28, 2008, 10:21 PM   #2
Evolving Member
Personal Sales Rating: (0)
Garage is empty, add now
 
nawaz's Avatar
 
Join Date: Oct 2007
Location: Plano, Texas
Posts: 336

I heard that the very light weight flywheels tend to be less friendly when getting the car going from a stop. The car may stutter a bit or feel a bit shaky when getting going. Also, I heard that when going full throttle, the rpm's not only get up faster, but also drop faster when changing gears. There's an advantage and a disadvantage in the lighter weight flywheel. I just went with the Streetlite flywheel opposed to getting the Prolite flywheel from ACT since it has a very good balance of both performance and street driving.
__________________
MODS: TRUST Ti-R Catback Exhaust, DC Sports Downpipe, AEM TRU-Boost Controller/Gauge, Walbro 255 Fuel Pump, ACT Street Disc Clutch/Streetlite Flywheel, Apexi Skeleton Clear Turbo Timer, Upgraded Motor Mount, Stock ECU Reflash, HAWK HPS Brake Pads, Carbign Craft Exhaust Heat Shield, 22% Tint, Evolution IX UK Badge (All performance work done by Kevin D. in DFW area).
Offline
 
Reply With Quote
Old Dec 28, 2008, 11:06 PM   #3
Evolving Member
Personal Sales Rating: (1)
Garage is empty, add now
 
al3xx's Avatar
 
Join Date: Apr 2008
Location: Austin, TX & Boston, MA
Posts: 133

Drives: 2006 AS EVO IX MR

In general, a lighter flywheel will mean that the car will rev more freely. Your engine will be more responsive and your acceleration will be increased, partially because you'll be able to shift faster.

The bad thing about lightened flywheels on turbo cars are that (supposedly) the weight of the flywheel helps the turbo spool up quickly. So if you go too light, your turbo won't spool as fast.
Offline
 
Reply With Quote
Old Dec 29, 2008, 12:41 AM   #4
Evolved Member
Personal Sales Rating: (2)
Garage is empty, add now
 
Join Date: Sep 2006
Location: Hermosa Beach, CA
Posts: 2,131

Drives: 05 EVO

Quote:
Originally Posted by al3xx View Post
The bad thing about lightened flywheels on turbo cars are that (supposedly) the weight of the flywheel helps the turbo spool up quickly. So if you go too light, your turbo won't spool as fast.
This myth needs to die. It's true that the turbo won't spool as quickly, but that's because there is less load on the engine due to less weight.

This is the same difference as trying to spool up the turbo in 1st gear vs. 5th gear. You can spool up to 20psi at very low rpms in 5th gear whereas it'll happen much later in 1st gear due to the engine being loaded up much more in 5th gear.

If you wanted your turbo to spool more quickly, you can stick a heavy *** flywheel in your car or put 500lbs of weight in the trunk. I can guanrantee you that your car will be slower though.

The one negative of a lighter flywheel is that it makes taking off from a stop more difficult as there's less inertia. Otherwise, nothing but benefits as it 'frees' up power by reducing inertia and weight, makes rev-matching/downshifting easier as the engine revs more freely, and I'd guess that it lessens the wear on the clutch and tranny on shifts due to less inertia. BUT, it probably increases clutch wear a bit when starting from a stop as you'll need to slip the clutch a bit more.

Last edited by spdracerut; Dec 29, 2008 at 12:43 AM.
Offline
 
Reply With Quote
Old Dec 29, 2008, 04:31 AM   #5
Evolving Member
Personal Sales Rating: (0)
Garage is empty, add now
 
Jason's Avatar
 
Join Date: Jul 2003
Location: Jamaica/FortLauderdale
Posts: 185

Drives: 97 240SX & 2001 Altezza Rs200

Send a message via MSN to Jason Send a message via Yahoo to Jason
Quote:
Originally Posted by al3xx View Post

The bad thing about lightened flywheels on turbo cars are that (supposedly) the weight of the flywheel helps the turbo spool up quickly. So if you go too light, your turbo won't spool as fast.

lol lol lol every day theres something new. That is very incorrect sir. Actually a lighter flywheel lets the engine rev quicker, so u actually get into the engines power band alot faster than with the heavier flywheel.
Offline
 
Reply With Quote
Old Dec 29, 2008, 07:59 AM   #6
Evolving Member
Personal Sales Rating: (1)
Garage is empty, add now
 
al3xx's Avatar
 
Join Date: Apr 2008
Location: Austin, TX & Boston, MA
Posts: 133

Drives: 2006 AS EVO IX MR

Quote:
Originally Posted by Jason View Post
Actually a lighter flywheel lets the engine rev quicker, so u actually get into the engines power band alot faster than with the heavier flywheel.
There's a difference between getting into the powerband and getting your turbo to spool up. Remember, the rpm's of your engine is not directly related to the rpm's of your turbo. Yes, you can rev faster, but it takes your turbo longer to spool up and provide max boost. So, yes theoretically I could stick in a heavy *** flywheel and get amazingly quick spool up, but then my car would be freaking slow. That's why there's a balance...if you go too light, you won't get max power very quickly as you'll be waiting for the turbo to develop enough boost. The information I got this from is MAP...I PM'ed them about getting a clutch/flywheel and asked him about how light I can go, this is what he said:

Quote:
Originally Posted by maperformance
With turbo cars you don't want to go too light because you need the extra load to help with quick spool.

Last edited by al3xx; Dec 29, 2008 at 08:02 AM.
Offline
 
Reply With Quote
Old Dec 29, 2008, 08:10 AM   #7
Evolved Member
Personal Sales Rating: (2)
Garage is empty, add now
 
switchblade906's Avatar
 
Join Date: Apr 2008
Location: フロリダ州
Posts: 859

Drives: OB X, SSS

its harder to get the car moving but after that you cant really tell unless your racing and then you will notice it rev's alot faster

look at my sig i have one
__________________
Engine: ETS Front Mount, ETS Upper IP, ETS Lower IP, AMS Intake System, GFB Bov, Forge MBC @ 23lbs, Forge wastegate actuator, Prosport Boost Gauge
Exhaust: Ultimate Racing Downpipe, Ultimate Racing Resonated Test Pipe, ETS Dual Exhaust, AEM Uego
Suspension: BC Adjustable Coilovers
Misc: Volk CE28N (Flat Black), RA Mud Flaps, ACT 6 Puck Clutch, ACT StreetLight Flywheel, 3% Tint

XtremeBoost
Darkside Engineering
www.tracktalk.net
Offline
 
Reply With Quote
Old Dec 29, 2008, 08:29 AM   #8
Evolving Member
Personal Sales Rating: (1)
Garage is empty, add now
 
al3xx's Avatar
 
Join Date: Apr 2008
Location: Austin, TX & Boston, MA
Posts: 133

Drives: 2006 AS EVO IX MR

^^ You won't notice a HUGE difference because the stock flywheel is 13.9 lb and the ACT StreetLight is 13.1 lb. Obviously the weight could be distributed way differently such that the StreetLight has much less rotational inertia, but you'd have to have both side by side to see if that is the case. The Exedy flywheel that comes with the twin disc is 12 lb, so there's a bigger difference there.
Offline
 
Reply With Quote
Old Dec 29, 2008, 09:05 AM   #9
Evolved Member
Personal Sales Rating: (4)
Garage is empty, add now
 
Joe's Evo X's Avatar
 
Join Date: Mar 2008
Location: Alamogordo, NM
Posts: 701

Drives: Evolution X, Kawasaki Ninja zx10r 2006

Hey guys thanks for all the good info. Is it true you lose TQ from a lighter flywheel?
__________________
CURRENT MODS
DTM FMIC
DTM DOMINATOR 2 TURBO
DTM LICP
AQUAMIST METH KIT HFS-1
U-R DOWN PIPE
U-R TEST PIPE
U-R CAT BACK EXHAUST
U-R UICP
AMS COLD AIR INTAKE
AMS SHIFTER BUSHINGS
GREDDY PROFEC B SPEC II EBC
GREDDY TURBO TIMER
MEGAN COILOVERS
EXEDY TWIN DISK CLUTCH
AEM WIDEBAND GAUGE
430AWHP/360 AWTQ ON MD @ 27PSI
Offline
 
Reply With Quote
Old Dec 29, 2008, 09:31 AM   #10
Evolved Member
Personal Sales Rating: (2)
Garage is empty, add now
 
Join Date: Sep 2006
Location: Hermosa Beach, CA
Posts: 2,131

Drives: 05 EVO

Quote:
Originally Posted by Joe's Evo X View Post
Hey guys thanks for all the good info. Is it true you lose TQ from a lighter flywheel?
No.
Offline
 
Reply With Quote
Old Dec 29, 2008, 09:32 AM   #11
Evolved Member
Personal Sales Rating: (2)
Garage is empty, add now
 
Join Date: Sep 2006
Location: Hermosa Beach, CA
Posts: 2,131

Drives: 05 EVO

Quote:
Originally Posted by al3xx View Post
The information I got this from is MAP...I PM'ed them about getting a clutch/flywheel and asked him about how light I can go, this is what he said:
Do you trust everything a shop tells you? If you listen to the old school domestic guys, they'll tell you that you need backpressure in the exhaust to make torque

Go grab a physics book, a basic book on engines (well, maybe not too basic), and draw your own conclusions.
Offline
 
Reply With Quote
Old Dec 29, 2008, 09:41 AM   #12
Evolved Member
Personal Sales Rating: (2)
Garage is empty, add now
 
switchblade906's Avatar
 
Join Date: Apr 2008
Location: フロリダ州
Posts: 859

Drives: OB X, SSS

Quote:
Originally Posted by al3xx View Post
^^ You won't notice a HUGE difference because the stock flywheel is 13.9 lb and the ACT StreetLight is 13.1 lb. Obviously the weight could be distributed way differently such that the StreetLight has much less rotational inertia, but you'd have to have both side by side to see if that is the case. The Exedy flywheel that comes with the twin disc is 12 lb, so there's a bigger difference there.
well you do have to rev it higher to take off thats what i was basically talking about
__________________
Engine: ETS Front Mount, ETS Upper IP, ETS Lower IP, AMS Intake System, GFB Bov, Forge MBC @ 23lbs, Forge wastegate actuator, Prosport Boost Gauge
Exhaust: Ultimate Racing Downpipe, Ultimate Racing Resonated Test Pipe, ETS Dual Exhaust, AEM Uego
Suspension: BC Adjustable Coilovers
Misc: Volk CE28N (Flat Black), RA Mud Flaps, ACT 6 Puck Clutch, ACT StreetLight Flywheel, 3% Tint

XtremeBoost
Darkside Engineering
www.tracktalk.net
Offline
 
Reply With Quote
Old Dec 29, 2008, 10:08 AM   #13
Evolved Member
Personal Sales Rating: (4)
Garage is empty, add now
 
Joe's Evo X's Avatar
 
Join Date: Mar 2008
Location: Alamogordo, NM
Posts: 701

Drives: Evolution X, Kawasaki Ninja zx10r 2006

Hey do you guys think a 11lbs flywheel would be to light
__________________
CURRENT MODS
DTM FMIC
DTM DOMINATOR 2 TURBO
DTM LICP
AQUAMIST METH KIT HFS-1
U-R DOWN PIPE
U-R TEST PIPE
U-R CAT BACK EXHAUST
U-R UICP
AMS COLD AIR INTAKE
AMS SHIFTER BUSHINGS
GREDDY PROFEC B SPEC II EBC
GREDDY TURBO TIMER
MEGAN COILOVERS
EXEDY TWIN DISK CLUTCH
AEM WIDEBAND GAUGE
430AWHP/360 AWTQ ON MD @ 27PSI
Offline
 
Reply With Quote
Old Dec 29, 2008, 06:40 PM   #14
Newbie
Personal Sales Rating: (3)
Garage is empty, add now
 
Join Date: May 2008
Location: Lynchburg, VA
Posts: 17

Drives: 2008 Evo X GSR and 2010 Acura TSX

I put in the lightest ACT flywheel (Pro Light - 11 or so lbs.) along with the ACT 6 puck sprung clutch. The weight difference is not much between stock and the ACT part as a previous poster said.

It feels great and the only issue I have driving on the street is how hard and fast the clutch grabs over the stock unit. If I had to break down why I have to tap the gas lightly before taking off i would say its 95% due to the ACT clutch grabbing harder and 5% due to the lighter flywheel.

Once you put a setup in like this you will notice a slight increase in how fast the motor revs but don't expect any amazing gains since there is no huge difference in weights. After putting about 300 miles on my clutch I have no issues (50% due to me learning how to drive with it and 50% due to it breaking in.) I would say if you are going to put a new clutch in, go ahead and put the lighter flywheel in too. I have no regrets from doing it and I was really worried before putting it in!
Offline
 
Reply With Quote
Old Dec 29, 2008, 08:26 PM   #15
Evolving Member
Personal Sales Rating: (1)
Garage is empty, add now
 
al3xx's Avatar
 
Join Date: Apr 2008
Location: Austin, TX & Boston, MA
Posts: 133

Drives: 2006 AS EVO IX MR

Quote:
Originally Posted by spdracerut View Post
Do you trust everything a shop tells you? If you listen to the old school domestic guys, they'll tell you that you need backpressure in the exhaust to make torque

Go grab a physics book, a basic book on engines (well, maybe not too basic), and draw your own conclusions.
I never said his information was necessarily correct, that's why I originally said, "(supposedly)." In any case, you said that the myth needs to die but you do indicate that installing a heavy *** flywheel will increase spooling rate. I can't find the difference between our arguments. Aren't we both saying that they don't spool up as fast because there's less weight?

Last edited by al3xx; Dec 29, 2008 at 08:29 PM.
Offline
 
Reply With Quote
Old Dec 29, 2008, 08:26 PM
EvolutionM
Mitsubishi Lancer




Paid Advertisement
 
 
 
Reply

Tags
advantage, disadvantage, disadvantages, evo, flywheel, ix, light, lighten, lightweight, reduce, spool, stock, time, turbo, weight

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are On
Refbacks are Off


 









All times are GMT -7. The time now is 04:26 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.5.2
All Passwords