Deep Singh

If so any feedback?Whats the optimum weight?

RT

Deep, me!

Cusco Cromoly item, about 6kg. IMHO, don't bother with the "lightened" STI 7.2kg one on the STI7. Even at 6kg, the difference beteen the std item and this one is minimal. Faster and more responsive, definitely. But frankly I did expect a little more.

No off-throttle or idling problems at all.

Hope this helps. Cheers.

Deep Singh

RT,worth the money or not?

RT

It depends on you. I'm not really a big fan of running big boost, nor do I really want to chase big power at this point. I love the added response and "revability" that a lighter flywheel gives.

However, take this to the extreme and you'll have an erratic idling, traffic-jam-nightmare vehicle. The line is quite wide and grey, so its really up to the individual.

For me, yes. It was worth my money. I had a chance to try another car that had the 7.2kg STI flywheel installed, and decided that there was hardly any difference from the original. Thats why I went for the Cusco item.

steve McCulloch

Edited as providing no really useful input!!

[Edited by steve McCulloch - 12/30/2002 10:20:17 AM]

jameswrx

iTrader: (4)

I have a lightened billet flywheel and it does spin up quicker than the standard one and seems more responsive, starter motor makes a diffenet noise since fitting too (less weight to turn I s'pose)
I needed a new one at a clutch change so thought I'd give it a try.
If I hadn't needed the clutch a lightened flywheel would have been the last thing on my mind.

The best way to put it is; if I bought another scoob tomorrow and it wasn't in the need of a new clutch or pulling apart for some reason I would never choose to fit a lightened flywheel for any sort of 'gain'

edited to say: don't have idling trouble at all
James

[Edited by jameswrx - 12/29/2002 4:32:42 PM]

Tim W

iTrader: (1)

I had my stock 98 flywheel taken down to 8.4 kg from 11.6 works fine...

mark@lateralpermormance sells a billet lightweight flywheel for the classic scoob which came in at 6kg IIRC, I beleive this was the optimum weight for smooth idle and fast pick up...he'll know if it can be fitted to the 7

Deep Singh

I'm getting slightly mixed signals(as with most things).Some saying increased revability,some saying no real difference noticed.
James WRX do you know the weight of your flywheel?

Bob Rawle

I have a lightened flywheel on my own car... weighs in at 5.45 kg, idle is no problem and engine response is much much better, instant pick up if reved out of gear. Got mine through Roger Clark Motorsport .. its also a billet jobby, I have some pics if I can remember how to puit them up.

Bob Rawle

These are hopefully pics of the item I have, its manufactured from the same material as my conrods.

Deep Singh

Thanks Bob.Thats another New Years resolution!

Deep Singh

Almost missed the conrods! Have you just uprated those Bob or the pistons aswell?

Bob Rawle

Built a new engine using an STi7 semi-closed deck block, the lightened flywheel of course, AP organic clutch (for the time being), uprated rods (Arrow), pistons (Omega), WRC crank (STi), oil pump (Roger Clark Motorsport), tubular headers & up pipe (Ion), modified hybrid turbo (Turbo Dynamics), uprated fuel pump (Walbro), adjustable fuel pressure STi inlet pipe (STi), air filter K & N on a short inlet tract, exhaust HKS Hiper, downpipe Haywood & Scott full 3", APS FMIC with water spray, coated inlet manifold, higher ( circa 8.5 to 1) compression ratio. This is the revision A spec, first spec had a 7.9 to 1 comp ratio and different pistons, new ones are virtually flat topped. Currently running "medium" boost. Changed the pistons as I had been waiting for them to be developed and manufactured since June, previous items were Cosworth. Whole lot was put together in conjunction with Roger Clark Motorsport. I've currently run it with Link, Motec and a remapped Jecs (using Ecutek software) and I will be trying a Gems in it as well for good measure. Just bedded it all in and changed over to the Motul again so now the fun begins.

jameswrx

iTrader: (4)

Deep singh, my flywheel came from Mark at Lateral Performance so if Tim W is right it weighs 6kg.
James

Tim W

iTrader: (1)

Erm...looks like I was wrong... it's 6.6kg

As sold here:

http://shop.scoobynet.co.uk/Product.asp?ProductID=571

And get one of these to go with it:

http://shop.scoobynet.co.uk/Product.asp?ProductID=547

Just for good measure

RT

Quote
"I'm getting slightly mixed signals(as with most things).Some saying increased revability,some saying no real difference noticed.
James WRX do you know the weight of your flywheel?"

Deep,
I would say the difference is noticeable in gear 1, and not really noticable from gear 2 upwards. When I used "revability", I meant with the clutch disengaged - when you blip the throttle on downshifts for example.

On the same coin, revs drop faster in between gear (up) shifts. This means that you can be faster with the clutch and the shifting, without having to wait for the revs to rise (or fall) to match the roadspeed.

Cheers.

kuwaiti

Its very interesting subject
And the QUESTION is
Stick with original or go with light flywheel??

dowser

I lightened the original same time as I fitted the uprated clutch - took it down from 11.5 to 8.4kg. Car appeared to spin up quicker when I first drove it afterwards - but I quickly got used to it.

I think, if the box is out anyway, it would be rude not too really

Richard

Trout...

Currently running with a lightened standard flywheel - down from 11kg to 8kg - this gives improved engine response - it does rev more freely.

Next I will be fitting the billet job from Lateral Performance with the uprated paddle clutch

Trout

Andy.F

Trout £50 for your old one

Deep Singh

Cheers guys.
Thanks Bob.Never realised you had rebuilt the engine,must keep up with the gossip more!

StanS

iTrader: (3)

Also running 5.4kg billet flywheel plus paddle clutch.
Tricky getting smooth start (needs >2.5K revs).
Better response when revved, no idling probs (GEMS) - recommend it unless you are very often in queues/jams !!
Stan

matt b.

i am about to undergo a clutch change so i was thinking about getting my flywheell skimmed/ lightened whilst the box was out. am i best to go for a billet pre-fab'd jobee, or am i okay to just get my stock item made lighter? i assume any good engineering firm can do this?

also, are there downsides as well as up? increased petrol consumption? stressed internals? blown up everything? ive read a lot about idle probs, are these guarenteed? i do spend quite a bit of time stuck in traffic, so would it be wise to stick with the stock weight?

any light shed earns the remainder of the xmas quality street. Note: all the nice purple ones have gone already.

Matt B.

Tim W

iTrader: (1)

I had a spare flywheel lightened and balanced, then had the new coverplate balanced ast well (so that whe it's changed all I have to do is balance the new coverplate) and it set me back about 90 quid in all...my old flywheel however once off the car was found to have loads of surface cracks from heat build up...it was scrap!

Personally I'd get another flywheel first and get it lightened and balanced, so the clutch change won't take too long!

Trout...

Andy,

if you are serious I will let you know - depends what I do with the engine

Trout

Frank Bangkok

I have been offered a Cusco Cromoly of 4.6 kgs, would this be too light i.e. poor idling etc?

Plsd to hear

Andy.F

Cheers Trout but I've now taken the plunge and bought a 5kg MRT item

matt b.

Trout,

if youve still got the FW and want to sell it give me a shout mate, id be very interested in buying it.

thanks,
matt.

Frenchie

Maybe a stupid question but... concerning the lightenned std ones: did anybody re-balanced the flywheel ?

I expect this to have some influence on reliability.

Bob Rawle

Its normal to balance the clutch and lightened flywheel assembly together, mine was. The "heavier" ones may not be so sensitive but at 5.45 kg it was deemed necessary.