flywheel question for vts

16th September 2009, 11:23

hi what are the pros and cons of getting a lightened and balanced flywheel like this one.
whats the weight of a standard one.

Peugeot 106 S16, Citroen Saxo VTS 16V (TU5J4 engine)

Weight: 3.8 kilograms (4.8 kilograms as a version available!)

16th September 2009, 13:57

quicker acceleration, will vibrate ALOT though.. cranks balanced by the flywheel..

16th September 2009, 14:01

vibrations should not be affected, cranks are balance by themselves, you can see that on the counterweights of the crank there will be machine marks where material has been removed to balance the crank both statically and dynamically.

The flywheel itself should also be balanced so again no increase in vibrations should be noticed.

16th September 2009, 14:12

Engine will rev up quicker in neutral ie better throttle response, car will accelerate quicker through the gears. Maybe a bit easier to stall though and you might feel a slight loss of power up small inclines as the flywheel is lighter and will not "store" momentum as well as the heavier one did.

I think more plus points then negative ones though.

16th September 2009, 14:50

loss of power up an incline is also a myth.

a lighter flywheel will make the engine and therefor the car accelerate quicker. It will feel like the car has lost weight.

The downsides are that the engine might have a greater tendancy to stall. Also the flywheel will not be able to absorb as much heat from the clutch, so in circumstances where the clutch has to cope with alot of torque it will overheat and therefore wear out at an accelerated rate.

16th September 2009, 15:34

Quote:

Originally Posted by ally-vts

quicker acceleration, will vibrate ALOT though.. cranks balanced by the flywheel..

if it was to vibrate alot the enigne wouldnt last long.

16th September 2009, 18:05

thinking about gettin lightened flywheel my self for my 03 vtr,

if i get the original 1 lighted would it be the same as buyin a lightened 1?

tryin till make car bit quicker as cheaply as possible??

would this be the best mod or any other idea's???

16th September 2009, 18:16

so would it be a bad idea putting one on as the car is in the process of been turboed

16th September 2009, 19:35

yes in a simple word, your clutch and flywheel will overheat. Also the turbo will spool up quicker giving more stress on your gearbox and agravating wheelspin in lower gears.

16th September 2009, 19:48

I love my lightened flywheel flywheel - it's a 2.9kg Helix one, revs up sooo quick!

16th September 2009, 21:19

Raunchz, can i ask where you got yours from please mate??

16th September 2009, 22:06

I got it off a member on here - he got it from Demon Tweaks - around about £350-£400 from memory.

Is great, the car revs up so much quicker - no negatives I can tell, have to be a bit more carefully in traffic so don't stall, but nothing massively noticable.

That flywheel above looks very flimsy around the centre, add a clutch onto it, and some harsh engine rev changes/high revs and it looks like it would easily break - just my opinion.

16th September 2009, 23:20

well i think i dont want one now going of what you all have said ...you just saved me 250 pound
thanks

17th September 2009, 16:22

lightened and balanced flywheel is one of the most overlooked mods. Awesome gain for little money.

So what if you have to be nimble footed on the clutch........ it lightens the bottome end

17th September 2009, 16:32

Quote:

Originally Posted by McPikie

lightened and balanced flywheel is one of the most overlooked mods. Awesome gain for little money.

So what if you have to be nimble footed on the clutch........ it lightens the bottome end

The issue comes that if its done by the machining method rather than a billet one, it can cause alot of issues, or even fail.

many people wont spend £3-400 for a billet one.

17th September 2009, 18:08

too many ppl these days taking stock ones to a fabricator and getting them machined, then having it fail and cause mega damage

17th September 2009, 18:14

Seeing as the people that get them machined run them on higher reving na engines it's a big risk to take - or the amount removed for it to be safe isn't worth the expense.

Going from a 6kg flywheel to a 3kg'ish flywheel, I definately notice a difference - but going from a 6kg to a 5kg I'm not sure you would, just IMO

saying that though, people with 4-5kg standard flywheels seem to run them with no probs

17th September 2009, 18:17

can be done well and cheaply if you say need to remove gearbox to fit a clutch etc and you know someone whos done it and knows how to do it properly but best to take just a lil bit off, nothing major but most dont have a clue, i know a lad that does it for 40, has done loads and no complaints thus far as he wont take loads out incase he get sued for damage caused

17th September 2009, 19:19

Sliders if your planning on doing this to a turbo car there are a few extra down sides. Biggest one is that the flywheel is not only used as a engine damper but also is the heatsink for the clutch. The smaller the less heat capacity and the sooner you clutch fails. The other is that the clutch is there to make the car easier to drive. The lighter you make it the more a car with want to stall, jump about, wheel spin and so on. Once you start driving a turbo car you will realise they can be a nightmare to drive and this is why most cars original fitted with trubos have nice large flywheels.

On flip side on normally aspirated engine lighter fly wheels do have many advantages as people have said but the standard one is not all that strong and do fail. Any one planning on doing a wild normally aspirated engine I would recommend not trying to lighten your stock fly wheel much if at all. If you do want a light one get a steel or alloy item.