WTA diferrent flywheel vs horse power vs accelaration

[scottwrx]

Dear all sifus

would appreciate your input..

wanna know actually what is the relevance between lightened flywheel and performance, coz from what i know lightened flywheel bring better engine responce pickup / accelation..

but will it allows more horsepower during dyno?

what about the top speed?

lightened flywheel will get a low top speed.. izzit true??

what about the torque?

fuel consumption, lower on town drive compared to standard flywheel and higher consumption on highways.. true? coz during town drive the engine needs lesser momentum to push.. on highways engine needs to work more due to lower momentum...

juz wanna know coz i have been using the same flywheel since conversion...


appreciate if u all could share..

thanx!!!!!!!!!!!!!!!

 

[t-la]

fuh...i will try to ans ur ques my friend....but dont trust me.....

1-wanna know actually what is the relevance between lightened flywheel and performance, coz from what i know lightened flywheel bring better engine responce pickup / accelation..
=yes, very relevant. lighter flywheel will make ur engine rev easily and will give better response.

2-but will it allows more horsepower during dyno?
= Allow more? what do u mean?
of course it will allow whatever power from ur engine...no restriction

3-what about the top speed?
= nothing wrong with the top speed

4-lightened flywheel will get a low top speed.. izzit true??
= no it is not..how light is the flywhl...?

5-what about the torque?
= the torque may be increse a bit or maybe not at all, but it will change the curve of the torque graph if u compare directly before and after.

6-fuel consumption, lower on town drive compared to standard flywheel and higher consumption on highways.. true? coz during town drive the engine needs lesser momentum to push.. on highways engine needs to work more due to lower momentum...
= for me i feel like the fc is most the same..changing to lighter flywhl didnt affect-ed much. u still can reach kedah with rm 50 (1.80 p/ltr) petrol from kl by constant driving (obey the speed limit).

7-juz wanna know coz i have been using the same flywheel since conversion...
= good to know that..now its time for u to change

8-appreciate if u all could share..
= shared. now change it

 

[wfhan]

scotty,

no do homework ka ?

Below quoted from another website :-

A heavy flywheel located between the engine and the gearbox builds up rotational force with speed and momentum. Effectively storing the energy and helping the car resist changes in engine speed - good for cruising at a steady speed but bad when you need a fast engine response.
Drawbacks – it takes effort to get the wheel rotating and stops the engines revs increasing or slowing down quickly.

A lighter wheel takes strain off the engine and allows the engine to rev more freely, as a bonus as there is less weight the engine is able to release more power.
The big downside to a lighter flywheel is that engine momentum or inertial spin is reduced – most noticeably on a hill.
Whereas the momentum in the engine is maintained with a heavy flywheel the momentum is reduced and the hill has a much more direct effect on the engine output.


how about consider a CABRON FIBRE DRIVESHAFT ? hehehe

If you are serious about lightning bits and pieces to get a free revving engine try a carbon fibre drive shaft. These will rotationally flex more that their metal counterparts and reduce strain on the engine. If a metal drive shaft breaks you will soon know about it as parts are thrown through the car! A carbon fibre one is stronger but if it does break it will 'broom' into 'harmless' fibres and little damage will be done to the car.

 

[scottwrx]

fuh...i will try to ans ur ques my friend....but dont trust me.....

1-wanna know actually what is the relevance between lightened flywheel and performance, coz from what i know lightened flywheel bring better engine responce pickup / accelation..
=yes, very relevant. lighter flywheel will make ur engine rev easily and will give better response.

2-but will it allows more horsepower during dyno?
= Allow more? what do u mean?
of course it will allow whatever power from ur engine...no restriction

3-what about the top speed?
= nothing wrong with the top speed

4-lightened flywheel will get a low top speed.. izzit true??
= no it is not..how light is the flywhl...?

5-what about the torque?
= the torque may be increse a bit or maybe not at all, but it will change the curve of the torque graph if u compare directly before and after.

6-fuel consumption, lower on town drive compared to standard flywheel and higher consumption on highways.. true? coz during town drive the engine needs lesser momentum to push.. on highways engine needs to work more due to lower momentum...
= for me i feel like the fc is most the same..changing to lighter flywhl didnt affect-ed much. u still can reach kedah with rm 50 (1.80 p/ltr) petrol from kl by constant driving (obey the speed limit).

7-juz wanna know coz i have been using the same flywheel since conversion...
= good to know that..now its time for u to change

8-appreciate if u all could share..
= shared. now change it

hehe.. thanx bro... and u will not be able to racun me lah.. coz i have been using toda since day1.. muahaha... juz curious about the flywheel issue

regarding horse power.. what i mean is same engine, will lightened flywheel produce more horse power when dyno ar?

 

[AE80TypeD]

the correct term is it "frees up more horsepower" from having to turn the flywheel. ur car has the same amount of HP regardless of how much the flywheel weighs, the issue is a lighter flywheel will mean more hp available to other parts a.k.a straight to the road.

as to seeing more HP on the dyno sheet from b4 & after light flywheel, no one can really say. theoritically speaking yes it should show more HP than b4, but it is not 100% guaranteed in every case. the important thing to remember is even IF it shows more HP, those are pre-existing HP "liberated" which was previously "wasted" to turn the flywheel weight, not additional HP from nowhere. the HP & torque curve will definitely be a visible indicator for a flywheel dyno comparison if thats what u're keen on seeing.

already nice flywheel from day 1... darnit im so green with envy

 

[scomatic]

Bro... this 2 statement i'm abit not so agree with it.

2-but will it allows more horsepower during dyno?
= Allow more? what do u mean?
of course it will allow whatever power from ur engine...no restriction

If use lightweight flywheel, during dyno the horsepower confirmed will not add.
It only change the curve of the torque graph only.

3-what about the top speed?
= nothing wrong with the top speed

No, it very wrong if use too lightweight flywheel. I used the Tom flywheel before with 2.4 kg only... result: very fast in accelerate, but lack at high rpm. Can't high rpm, mean can't go on top speed too... about 5500 rpm, the engine like free already... like velocity already... (don't know how to describe)

For 4AGE... the best flywheel weight is about 4.1 - 5 kg...


Anyway.... please contact BR Clutch (Brian)... he can explain very detail to you...

 

[1JZtezza]

NA engines; for same torque you got to build revs for increase in HP else you got to increase compression.

1)lighten flywheel(TODA,TRD or TOM'S-normally come balanced)Skimmed flywheels make sure its balance properly.
2)Just flywheel ALONE-more rev happy other things more or less the same.The noticeable difference is what WFHAN wrote:imagine going up a steep muddy track at low rpm whilst trying not to spin the wheels
2)It must be complemented with a higher final drive say 4.5 or 5.1(If nothing else added to engine)so if you cant build revs or got rev cut;not much advantage, better acceleration;no top
Purpose of this set up is to tap the higher rpm range where normally your torque curve drops off)
3)Just a change in final drive alone CAN increase HP(marginal maybe) and or bring your torque curve earlier in the rpm range.
4)You may want to add cams but dont forget :too high cams and/or compression with a very very light flywheel may mean you need to idle at say above 1000/1500 rpm
5)So higher RPM,bigger final drive means Fuel consumption go up correspondingly.
6)NO EXTRA INPUT(fuel) =NO EXTRA OUTPUT(HP)

HAVE FUN!

 

[banzai]

No, it very wrong if use too lightweight flywheel. I used the Tom flywheel before with 2.4 kg only... result: very fast in accelerate, but lack at high rpm. Can't high rpm, mean can't go on top speed too... about 5500 rpm, the engine like free already... like velocity already... (don't know how to describe)

For 4AGE... the best flywheel weight is about 4.1 - 5 kg...

TOM's flywheel 2.4kg?? u sure?

 

[Barbarian]

same concept as changing to lighter pulleys, lighter valve train, ligther pistons and lighter rims....

 

[1JZtezza]

Not so much the overall weight of flywheel though it does matter but more the inertia --IE the weight/mass at the edge, the toothed end that meets the starter.

 

[BLaCkHoWLiNG]

i dont think lightened flywheel will affect top speed... but torque yes... esp. for NA cars... but by all means.. GO FOR IT... dont go lighten your stock flywheel.. get a good aftermarket ones... just to be safe.. unless u want the flywheel to break loose cutting through the hull and through yr left leg...

 

[Barbarian]

infact, it helps to rev higher.....

engine breaking will be more noticable...

 

[t-la]

Bro... this 2 statement i'm abit not so agree with it.



If use lightweight flywheel, during dyno the horsepower confirmed will not add.
It only change the curve of the torque graph only.

it is okay for me if u not so agree with it.....this is just open discussion....
1st of all, ive already mention 'dont trust me'
2nd...i didnt say it will 'add' hp...i just said 'allow'.
3rd...u just repeated my phrase man....

No, it very wrong if use too lightweight flywheel. I used the Tom flywheel before with 2.4 kg only... result: very fast in accelerate, but lack at high rpm. Can't high rpm, mean can't go on top speed too... about 5500 rpm, the engine like free already... like velocity already... (don't know how to describe)

For 4AGE... the best flywheel weight is about 4.1 - 5 kg...

u've suffer at the high rpm maybe bcos ur engine didnt have enuf power lah.... ..... thats why ive used heavier flywheel...bcos my car not power ma...my car slow bai

i dont think lightened flywheel will affect top speed... but torque yes... esp. for NA cars... but by all means.. GO FOR IT... dont go lighten your stock flywheel.. get a good aftermarket ones... just to be safe.. unless u want the flywheel to break loose cutting through the hull and through yr left leg...

mr BLaCkHoWLiNG,
u are so right.

 

[chinozie]

heeee...ME and VE concept...

plus it's a Newton Second law => F=ma

the higher mass you used, the more force you need...!!!

more mass => more engine load
less mass => do the math !!!

 

[scomatic]

TOM's flywheel 2.4kg?? u sure?

yes.. pretty sure... "tom's" also have 1 before...

Bump:

it is okay for me if u not so agree with it.....this is just open discussion....
1st of all, ive already mention 'dont trust me'
2nd...i didnt say it will 'add' hp...i just said 'allow'.
3rd...u just repeated my phrase man....

Yes, open discussion only le... don't be so serious le...

u've suffer at the high rpm maybe bcos ur engine didnt have enuf power lah.... ..... thats why ive used heavier flywheel...bcos my car not power ma...my car slow bai

Aiyooo... bro... everyone know ur car powerful le... don't act like that le...




Back to topic:
My last remind... If uphill, lightweight flywheel will affected performance too...

 

[pcmoddingmy]

So in short, Genting goers or touge racers pls dont use lightened flywheel. Also, I think the weight of the flywheel is important... too light and it will affect the performance.

 

[Barbarian]

My last remind... If uphill, lightweight flywheel will affected performance too...

no... it will not affect uphill performance... infact, it will help you climb faster..... but if you release throttle while climbing, then the car will slow down significantly due to lower momentum.....

 

[wfhan]

i think the keyword here are 'to maintain momentum' and 'to gain momentum'.

 

[banzai]

scomatic : TOM's flywheel for 20v is 3.8kg.
It is 2.4kg lighter than stock. please get your facts right.

 

[n0th1n]

when it comes to mass rotating calculation,
not only the flywheel will effect, clutch cover and clutch plate also included.

last experience 8.5" set, toda flywheel, trd 3 puck and trd clutch cover : 8kg++ (analogue scale)

a friend using super single cusco (i think its 8", forgot) : 8kg++ (analogue scale)

just now timbang a set of 8" set, toda flywheel, trd heavy duty and trd clutch cover : 8kg++ (digital scale)

toda flywheel for 8.5" is about 4kg++ (analogue scale)
toda flywheel for 8" is about 3.8kg++ (digital scale)

t-la, since when u use aftermarket flywheel, u kene kira one set laaaaa :P

3000 rpm in gear 1 (with normal flywheel + normal clutch system) vs 3000 rpm in gear 1 (with aftermarket flywheel + aftermarket clucth system) will differ.
slope of 35degree ( i think ), more power in normal system
but if talking about response and lightness, aftermarket system will superior