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[azza_126]

well i believe any weight off the engine and running gear is always better than no weight as it will always rev up easyer and quicker even if its just a fly wheel as there is less weight to spin up thats also a reason why people use light weight props and have light weight racing forged pistons every little helps even if you only start with the flywheel.
also people use light weight alloys and drive shafts.
i found a light weight flywheel on cortneys website for the 2.5v6 vectra but if what is said is right then that should fit the omega aswell

[albitz]

Its a samall reduction in overall weight yes,but an expensive one imo.Lightweight pistons - a different matter.They have to accellerate from bdc to tdc,stop and go back down to bdc many times per second.A small weight reduction will help in that process and put much less stress and strain on the crank and bearings etc.
I may be wrong and am quite willing to be corrected by someone with more technical knowledge than me - which isnt difficult.

[Andy B]

I agree with Albs. All very well spinning an engine up to sillyrpm in a nanosecond if the car is also lightweight, but we're talking 1700 kg of Omega. A lightened flywheel in a car like a Scimitar that you can pick up on your own I reckon will be a different ball game. 

[lozzzzzz]

Albs, I see what you're saying about the light wieght pistons, but it won't help the car accelerate any quicker, however, the lighter stonger components will all the max rpm to be raised without stressing the crank like you said, so with different cams they allow more power to be made. 

azza_126, too right, taking mass of rotating components is much better than taking the same mass off the car, its all about the gearing, the engine has to rotate 15 times (in first) for every rotation of the wheel, so any reduction in mass will be be 15 times more effective if its taken away from something spinning at engine speed (in 1st). 

The courtney flywheel definately fits you need some different bolts though, part number 90511423.  And the clutch is a bit of a pain as you need to find one with springs (otherwise its really judery to drive).  I used one from some 2.2 something or other, I'm hoping it will stand up to the torque, time will tell. 

Andy, thats the plan I think it'll be weighing in at 1200 ish when its all done maybe a tad more, I'll let you'll know. 

(sorry for threadjacking)

[serek]

Albs, I see what you're saying about the light wieght pistons, but it won't help the car accelerate any quicker, however, the lighter stonger components will all the max rpm to be raised without stressing the crank like you said, so with different cams they allow more power to be made. 

azza_126, too right, taking mass of rotating components is much better than taking the same mass off the car, its all about the gearing, the engine has to rotate 15 times (in first) for every rotation of the wheel, so any reduction in mass will be be 15 times more effective if its taken away from something spinning at engine speed (in 1st). 

The courtney flywheel definately fits you need some different bolts though, part number 90511423.  And the clutch is a bit of a pain as you need to find one with springs (otherwise its really judery to drive).  I used one from some 2.2 something or other, I'm hoping it will stand up to the torque, time will tell. 

Andy, thats the plan I think it'll be weighing in at 1200 ish when its all done maybe a tad more, I'll let you'll know. 

(sorry for threadjacking)

clutch for fly wheel from courtney its cheap , its standard clutch of vectra b where you can buy on ebay for next to nothing.
but fly wheel from courtney cost near 300£ and on top of that cost of clutch will come round 500 notes
where you can use C20XE flat type fly wheel 6.5kgs from 10£ on ebay ,its possible have this done lot cheapper with same result

[azza_126]

so does the c20xe flywheel fit the x30xe engine?

[lozzzzzz]

The X30XE has a very odd bolt pattern on the flywheel, its far from symetrical and can only be fitted one way.  And even if the c20xe fits you'll have to do something pretty clever with clutch release as the whole clutch assembly will be closer to the engine with it being a flat flywheel (not 2 inches thick).

[cem_devecioglu]

I have witnessed a bit vibration on cold mornings until the engine heat up.. and a tiny flywheel may increase it, so personally I wouldnt go for x20xe clutch

[azza_126]

so does the c20xe flywheel fit or not? (sorry im getting a bit confused lol)

[cem_devecioglu]

so does the c20xe flywheel fit or not? (sorry im getting a bit confused lol)

no idea

[serek]

so does the c20xe flywheel fit or not? (sorry im getting a bit confused lol)

fit, will post some photos

[azza_126]

That's good then does it work? I mean any problems like clutch slipping due to more power in the v6 or bearing not reaching?

[serek]

The X30XE has a very odd bolt pattern on the flywheel, its far from symetrical and can only be fitted one way.  And even if the c20xe fits you'll have to do something pretty clever with clutch release as the whole clutch assembly will be closer to the engine with it being a flat flywheel (not 2 inches thick).

that what sort space problem 


got it fitted C20xe flywheel and clutch with 228mm clutch plate in to my mate 3.0 few weeks ago
hi done over 2K miles since.

[serek]

I have witnessed a bit vibration on cold mornings until the engine heat up.. and a tiny flywheel may increase it, so personally I wouldnt go for x20xe clutch

cant feal any on his car, any differents comper to DMF

[cem_devecioglu]

I have witnessed a bit vibration on cold mornings until the engine heat up.. and a tiny flywheel may increase it, so personally I wouldnt go for x20xe clutch

cant feal any on his car, any differents comper to DMF

not very sure though, it might be shaft dampers also