Lightened flywheels

[Wlee2]

yeh if you do have to change clutch do flywheel at the same time..

its one of those you might as well do since your gearbox is out =P..

i have to admit though.. because of my cars nature i have never really felt the benefits of flywheel.. because i never drove it just with the flywheel mod.. everything was done at once..

but its still a very good mod.. just that my car is a bad example for it haha..

[Jingers]

Not true at all.

With a lighter flywheel you will have MORE engine braking, as 00dc2 said, a flywheel is essentially an energy storage device. If you have less energy "stored" as inertia, then the engine braking effect will be increased because there is less inertia available from the flywheel effect.

Less torque is a common myth about lightened flywheels and can be easily disproven.

Think of it this way... does anyone ever tell you it's better to have heavy wheels on your car for acceleration? Does anyone ever tell you that if you put light forged wheels on your car that you will lose torque? Same deal with a flywheel, except with a flywheel its effects are multiplied through the gearing giving you an even greater effect.

Someone calculated it somewhere - will have to find it - but the effect of removing 4kg of flywheel mass is the approximate equivalent of removing about 70kg of static weight from your car in first gear (due to the multiplication factor of the gearing etc). That is a noticeable difference.

i can easily prove that its not so too.

For eg most work utes run a heavy ass fly wheel to generate more torque and momentum from its measly engine, maybe its not noticeable but it is definitly not myth

[Jingers]

ok maybe i should have written a longer response in my initial post.

So i will attempt it again

.

The feeling through a drivers ass when changing to a lightened fly wheel is that of loss of torque.

[TAFKA TMB]

I’ve had the TODA flywheel on my car and while it is easier to stall it is a lot easier to match revs on downshifts. When you are really getting stuck in to the car it is no problem. I elected to stick with the original clutch as my original lasted for over 130k and 30 odd track days. It’s a daily driver in heavy traffic too so I was a bit edgy about a heavier clutch.

The only reason you’d go for a heavier flywheel is durability (if the alternative was a cheap shoddy lightweight job) or maybe in some drag racing applications (where you need the steel to pull you off the line).

[Wlee2]

i can easily prove that its not so too.

For eg most work utes run a heavy ass fly wheel to generate more torque and momentum from its measly engine, maybe its not noticeable but it is definitly not myth

i think the use of the word torque.. is a bit maybee wrong.. i think it should maybee more innertia..

The extra torque is not extra is a results of momentum.. its harder to stop a heavier object from spinning.. hence it will resist more..

as far as i understand it.. flywheel doesnt gain or loose. the engine makes so much power.. and will try to transfer that power out to the flywheel.. lighter flywheel spin up faster.. heavier ones spin up slower..

then the negatives lighter ones spin down faster.. heavier ones well slower..

so.. like vincent said theres always a + and -.. but its obvious we dont drive trucks =P... we have mostly light cars

i still have trouble understanding where the actually Idea of torque been lost came from.. it wasent lost it was just used in a different way..

[VTECMACHINE]

As with all mods you gain something and you lose something.

A lighten flywheel allows you to rev up faster and the revs also drop faster.

Rev'ing faster = faster acceleration as it allows you to access your full power in a shorter time.

Revs dropping faster = as you said, when you change gears you will lose more revs which may result in you dropping out of power band. Shifting faster and smoother can help the reduce in drop in revs but it maybe annoying doing these kind of shifts if you have to do it daily.

All in all its meant to make your car much more fun and is even rated better bang for you r buck (in acceleration wise) over header/extractors by Toda.

it's really not that bad. The part of accelerating quicker is true, and is awsome. yes your revs drop a little, but it's really not that noticable. You just need to shift a tad quicker.

When you go up a hill, it's harder to get up it, as a result you need to down gear. This is to do with inertia.

It is definately a mod that will benefit you.

as you may be aware, there are many different products:

Toda (4.1kg's)
Spoon (4.19kg's)
RG (3.9kg's)

and there's plenty more... like J's racing etc etc...

Just don't get one too light. The Spoon and Toda flywheels are perfect for street, and a bit of track work.

On another note, not once have a dropped out of VTEC when changing gears.

[TeMp]

^Hmmm..

do you have one temp? if so, do you recommend it?

I do but the clutch and flywheel is both sitting in my coupboard, I will also give some feedback when I put it in. I have done my research and the response are mostly the same positive feedback. So I def would reccomend it given that you are happy to accept both the positives and the negatives.

The lightest FW I know of (for DC5R) is the ATS carbon (3.6kg)

If you want even greater acceleration improvement you could consider changing you final drive as well but I'm told this is another level of labour compared to just changing clutch and fw, even those the gb is out already (wouldn't mind if someone can confirm this for me).

Apologies for the OT.

[00dc2]

i can easily prove that its not so too.

For eg most work utes run a heavy ass fly wheel to generate more torque and momentum from its measly engine, maybe its not noticeable but it is definitly not myth

"utes run a heavy ass fly wheel to generate more torque"

how can a piece of round metal outside the engine generate torque? it obviously cant. The engine outputs a certain amount of torque at each rpm value.. that's it..

the heavy flywheels on utes is to smooth out the drivers on/off use of the throttle so that ute and caravan move smoothly..

this talk about less torque IS a myth

[tinkerbell]

yep, and post #20 has most of the answers...

[freakygeek]

OH NO! The flywheel pixies have run away with my torques

[Jingers]

i think the use of the word torque.. is a bit maybee wrong.. i think it should maybee more innertia..

The extra torque is not extra is a results of momentum.. its harder to stop a heavier object from spinning.. hence it will resist more..

as far as i understand it.. flywheel doesnt gain or loose. the engine makes so much power.. and will try to transfer that power out to the flywheel.. lighter flywheel spin up faster.. heavier ones spin up slower..

then the negatives lighter ones spin down faster.. heavier ones well slower..

so.. like vincent said theres always a + and -.. but its obvious we dont drive trucks =P... we have mostly light cars

i still have trouble understanding where the actually Idea of torque been lost came from.. it wasent lost it was just used in a different way..

thanks wayne, thats what i really mean. I will restrain from posting short incorrect messages

[Elwood]

thanks guys... lotta help

[szymonsta]

mm..think i will get an exedy hyper single clutch/flywheel kit when i need to replace my clutch..115,000k's and stockie is still going strong though..

[Page]

mm..think i will get an exedy hyper single clutch/flywheel kit when i need to replace my clutch..115,000k's and stockie is still going strong though..

Havent heard much good about that brand....

[TeMp]

Havent heard much good about that brand....

Please elaborate?