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light weight flywheel worth it on turbo set up?

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Old Jan 24, 2007
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light weight flywheel worth it on turbo set up?

have a B & M short throw shifter,stage 3 clutch, the big Q: is the light weight flywheel worth doing with a turbo set up. let me know .thanks .
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Old Jan 24, 2007
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Your rpms will rise faster but the downside is they will fall faster so if you don't shift fast enough you might fall out of your power band. If nething the flywheel might make your car harder to move off the line w/o peeling out with that stage 3 clutch.

Last edited by ronaldo9; Jan 24, 2007 at 02:00 PM.
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Old Jan 24, 2007
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flywheels arent really that great for turbo cars because the rpms fall to fast between shifts making you have to work harder to get the turbo spooled again.
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Old Jan 27, 2007
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I've always been told that regardless of the fact that your car is turbocharged or not, installing a flywheel would be of great benefit, since it weighs less, it has reduced rotational mass, therefore more existing power is transferred through the drivetrain and subsequently, to the ground. Quicker revs yes, but will it be more difficult to shift between gears, I've never heard that before. Plus, the collected inertia by regular driving will translate into momentum keeping it spinning as you shift....Honestly, I don't have a flywheel installed so I don't know how credibile my opinion is....I just thought clutch and flywheel replacements were good.
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Old Jan 27, 2007
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when I got my clutch and bearings done the person advised me if I changed the flywheel , cause its lighter it might unbalance the entire engine, its just what I heard ???
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Old Jan 27, 2007
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Originally Posted by bluesteelrock
when I got my clutch and bearings done the person advised me if I changed the flywheel , cause its lighter it might unbalance the entire engine, its just what I heard ???
Again, I've never heard that before. If that happened when you replaced the flywheel, I think I would have read about it on the manufacturers website or at least somewhere. When I read articles in tuning magazines, whenever someone replaces the clutch, they replace the flywheel too.
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Old Jan 27, 2007
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THANKS FOR ALL THE REPLYS, IM GOING TO INSTALL THE FLYWHEEL.
I HAVE A STEEL LIGHT WEIGHT FLYWHEEL 11 LB.
ITS GOING IN . I THINK IT WILL BENIFIT ME. THANKS.
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Old Jan 27, 2007
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Old Jan 27, 2007
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The flywheel itself should be balanced. The engine isn't balanced with the FW on it, so as long as the flywheel itself isnt out of whack it should be fine.
The issue often encountered is the steel friction surface and the aluminum ring gear dont always stay together.
The whole inertia thing.... the more the turbo is spooled, the better off it is obviously, the revs drop very quickly when the clutch is disengaged, but its a matter of you rev-matching the shift to compensate.
I dont necessarily see the benefit to the expense of double a stock FW when the stocker isn't all that heavy to begin with.
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Old Jan 28, 2007
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t3/t4 8psi stage 3 act xtreme pressure plate and 8lbs flywheel
Putfile - 04 civic turbo 0 80 vid
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Old Jan 28, 2007
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Originally Posted by nismostreets21
t3/t4 8psi stage 3 act xtreme pressure plate and 8lbs flywheel
LOL - Seat belts son!

Guess there's proof that the RPM's don't fall too quickly!

Heheh. Turbos are cool.
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Old Jan 28, 2007
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THANKS FOR THE VID. IT SHOWS THE RPMS NEVER WENT UNDER 4,OOO RPMS . THANKS FOR THE ADDED BACK UP INFO.
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Old Jan 29, 2007
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Originally Posted by Eyger
I've always been told that regardless of the fact that your car is turbocharged or not, installing a flywheel would be of great benefit, since it weighs less, it has reduced rotational mass, therefore more existing power is transferred through the drivetrain and subsequently, to the ground. Quicker revs yes, but will it be more difficult to shift between gears, I've never heard that before. Plus, the collected inertia by regular driving will translate into momentum keeping it spinning as you shift....Honestly, I don't have a flywheel installed so I don't know how credibile my opinion is....I just thought clutch and flywheel replacements were good.
your right to a certain extent. remember that inertia is greater with more weight, once the weight is removed its easier for the motor to slow the lighter flywheel down and much faster.

you have to be very good at shifting to keep the rpms high. this actually takes its toll on the tranny because of the harder faster shifts as well. I have the act streetlight flywheel and felt a huge difference in how the car performs. honestly its not the most desirable for a DD.
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Old Jan 29, 2007
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Originally Posted by Boilermaker1
The flywheel itself should be balanced. The engine isn't balanced with the FW on it, so as long as the flywheel itself isnt out of whack it should be fine.
The issue often encountered is the steel friction surface and the aluminum ring gear dont always stay together.
The whole inertia thing.... the more the turbo is spooled, the better off it is obviously, the revs drop very quickly when the clutch is disengaged, but its a matter of you rev-matching the shift to compensate.
I dont necessarily see the benefit to the expense of double a stock FW when the stocker isn't all that heavy to begin with.
stock flywheel weighs 19lbs. its pretty heavy actually
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Old Jan 29, 2007
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I have a 7lbs fidanza flywheel and Exedy Street disk...

if you want, ill answer any questions you may have.
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Old Jan 29, 2007
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what about on an N/A em2? when i replace my clutch, i always figured I'd throw in an 11lb flywheel from dezod, would it really be that bad to DD?
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Old Jan 29, 2007
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no its not that bad. just have to rev a little higher to take off and keep sthe revs up or it will bog. also have to rev match between shifts if you want to keep your rpms up.
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Old Jan 29, 2007
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Originally Posted by sil04ver
what about on an N/A em2? when i replace my clutch, i always figured I'd throw in an 11lb flywheel from dezod, would it really be that bad to DD?
I just ordered an 11 lb flywheel to go with my new Exedy clutch. My ride is NA (for now) so I'll let you know how it is once it arrives and I install it (should be a couple weeks before it gets here). Search for my Gripforce Clutches thread to see which one I bought for my EM2.
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Old Jan 31, 2007
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its funny how just a few threads down from this i have a topic that talks about clutches and flywheels and the disadvantage of light vs heavy.. lol.. anyways.. read this

https://www.civicforums.com/forums/7...explained.html
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