Scooby96

What considerations should I take into account?

Will any other parts be required to fit a lightened version over a standard one?

Whats the price differential? Whats the likely life of both?

Are spacers required for lightened ones?

Should I just try and get mine skimmed?

Aztec Performance Ltd

iTrader: (234)

http://bbs.scoobynet.co.uk/showthrea...d+flywheel+bob

Aztec Performance Ltd

iTrader: (234)

You can have yours lightened or buy a lightweight flywheel.

No other parts required.

To have an OE one lightened to around 8kg is about £80...to just have yours skimmed would probably be half the cost

Aftermarket ones are £300+

Opions vary on the effectivness, with many people saying that its harder to launch but revs faster. Not come across many people who have tried it and not liked the improvement. Some people use ones weighing as little as 4kg.

After much consideration I brought one which is 4.3kg...havent got around to fitting it yet though.

Bob

theotherphil

I have a 4.2KG Fidanza FW fitted to my MY96 UK Saloon. Everything that was needed to fit it came in the kit. The car pulls much better with it fitted although it took a few weeks to get used to the new characteristics. Now it is second nature so launching isn't a problem. Definitely money well spent.

Scooby96

I have a borg & beck clutch waiting to go in but been told at 225mm it might not be up to the job and to go bigger?

Wadda you lot think?

Aztec Performance Ltd

iTrader: (234)

Depends on the spec of your car.

Bob

Scooby96

slight mods panel filter, stainless zorst (straight thru), scoobyecu c260bhp

Aztec Performance Ltd

iTrader: (234)

You should be alright with the B&B. B&B doesnt look as robust as OE but works fine. I have one on mine with similar spec.

Bob

Scooby96

thanks mate

SVVG

iTrader: (1)

I went for the RCM light flywheel and pulley kit and I can't notice the difference at all, apart from pulling away slowly in first I need a few hundred more revs. - not best pleased to have spent £600 on them, but whilst the clutch was being done seemed like a good idea...

Reckon you're better off spending the money on other mods IMO. (Grumpy grumpy SVVG)

Scooby96

Gone for std flywheel at 212.86 + VAT from Graham Goode - the bloody thing weighs 11kgs though so I expect postage wont be cheap!!!

Aztec Performance Ltd

iTrader: (234)

std flywheel for £212+vat are you mad? You can pick up std flywheels freshly skimmed for around £50 on here.

Bob

Aztec Performance Ltd

iTrader: (234)

and postage should be any more than £10 for 11kgs

Scooby96

For the sake of 100 or so quid I'd rather have a new one that, dare I say it, is warranted so if it does disintegrate I'll have some comeback

Aztec Performance Ltd

iTrader: (234)

thats £200 more than having yours skimmed. Havent heard of any OE flywheels disintegrating. You could have purchased an uprated flywheel for that money.

Bob

APIDavid

iTrader: (4)

The ideal weight of a lightened Subaru flywheel is between 6.5 and 7 kilos. In my opinion the Fidanza ones are too light at 4.2 Kg's.

The spool up time of the engine IS greatly enhanced by lightening the reciprocating weight [ all the round and round and up/ down bits ! ] AND the flywheel is one easy way to achieve that

However, even if you go to the ideal of 6.5 ish Kgs, you really ought to lighten the front end pulleys as they are the counterbalance to the flywheel. Imagine a see-saw with all the weight on one end......... You run the risk of crank flex with the the consequences that come with severe out-of-balance within the engine.

We do carefully , properly, lightened standard flywheels at £150.00 exchange.

David API Engines / APi Impreza

tweenierob

I wouldnt normally question your posts but this particular sentance has brought a big smile to my face, i would hope that all lightened flywheels are carefully/properly done.

very well worded, all that was missing was the word 'shiny'

I will however agree that the fidanza ones are too light, yeah the engine will rev freely unloaded and yeah the clutch will judder and yeah the car will need more revs to pull away and yeah.....

Personal experience of LIGHT flywheels is not good..


Rob

StickyMicky

on a side note, do the pullys wiegh much?

Scooby96

The plot thickens.....

The borg & beck I bought was a 225mm - exact same as the one coming out of my car. When I spoke to Graham Goodes yesterday they say they dont do a 225mm flywheel but the 230 is fine! Garage say NO WAY, call them back and they agree that it wont now be compatible, full refund offered (fair do's)

As the 230 flywheel is on its way I give the clutch people (Auto Spares Group) a call to see if I can have a 230 clutch - NO, dont do one!

So what the **** do I do now? Surely there are suppliers of 225 flywheels or 230 clutches?

H E L P!!!!!!!!!!!! :argh:

APIDavid

iTrader: (4)

We do the Exedy 230 as a standard or a competition organic. Prices are £212 for a 3 part set for the standard and £325.00 for the Organic competition 3 parts set [ which is the basis of the AP racing organic which is also made by Exedy but costs more and doesn't include the bearing!! ] Our prices are plus VAT and plus a modest carriage charge. We have stock of all.

I would always advocate using the 230 as it is a bigger and more modern clutch. It will fit on the 225 flywheel, but not the other way around.

Tweenie Rob; You should see some of the ' homemade' lightened flywheels that arrive here for fitting - some supplied by ' Subaru Specialists'. Then you would understand my comments better.

David APi Engines / APi Impreza

Scooby96

So what I've got is no good?

harvey

iTrader: (48)

I would like to echo what SVVG had to say. I have experience with lots of flywheel combinations.
A 4.5kg flywheel or thereabouts, from RCMS was expensive. Tickover has not been affected particularly and after a couple of days my technique had compensated for setting off in first gear. I cannot say there were any particularly noticable benefits, certainly not commensurate with the expense.
What I have noticed on two vehicles, both with the same flywheel, is that drag launches require more revs and far more precision for consistent starts. Best results I have had allround are with O/E flywheels, lightened to around 8kg. This should be done by an engineering shop that knows what it is doing. It is certainly the most cost effective solution, if done properly.

scubascooby

Hi David,

I was looking at the Perrin lightweight crank pulley for my 2.0 Sport (every little helps). Is it safe to swap the pulley without doing to the flywheel ? I am thinking that the slower spool-up of the NA engine might not stress the crank too much. What do you reckon ?

Regards,

Scubascooby

APIDavid

iTrader: (4)

Im my opinion the front pulley has a lot less inertial effect on the crank than the flywheel does - so it should be Ok.

Good Luck.

David APi Engines / APi Impreza