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[scotth84]

has any one done this before and can you buy the part? (was going to get it made)  have had this car for six month now and am well under way with the tunning, ive decated it 3.0l cams 3.0l lower devider 4 bar fuel. 3.0l plennnum. and wanted to make the air intake sorter. lightened fly wheel next many thanks scott

[Kevin Wood]

Not much you can do to improve the air intake, IMHO. Most modifications just increase noise. The air filter is massive and plenty capable of flowing enough air. What part are you referring to as the silencer though?

I wouldn't go to the trouble of a lightened flywheel on a heavy car like an Omega either, TBH. :-/ It's a lot of work for no real gain in performance.

Kevin

[scotth84]

the bit in front of cam belt case from trumpets  to air flow  meter....... as for fly wheel every little helps and it aint that much work.  we did a vectra gsi 1 in a night, made it pull much better in lower gears. thats what im after as its fine 3rd onwards!!!! cheers scott

[Andy B]

the bit in front of cam belt case from trumpets  to air flow  meter....... as for fly wheel every little helps and it aint that much work.  we did a vectra gsi 1 in a night, made it pull much better in lower gears. thats what im after as its fine 3rd onwards!!!! cheers scott

your flywheel is a dual mass afair and won't work as intended if you remove some of it. An Omega is a lot heavier than a FWD vectra and as Kevin says won't really make any positive advantages, infact I'd say a lightened flywheel will have a detrimental effect.  :-?
But there  you go ...... I have a gearbox more suited to a barge like the Omega anyway cos I don't want to be in control!        

[scotth84]

i have the early omega which has the big pot type of 15 kg and im goin down to 2.5 kg so less rotating mass on crank.... i was told they only have these big fly wheels because of some country where they had to get idle speed down to 500 rpm for emission reasons. am i better on mig web rather than here as there more into tunning cars?? and thats what i like doin as ive had 300 bhp cav turbos and 200 bhp red top cheers scott

[Andy B]

i have the early omega which has the big pot type of 15 kg and im goin down to 2.5 kg so less rotating mass on crank.... ......

Early,late, as far as I know they're ALL dual mass (manual Carltons & Senators were dual mass too) and don't respond well to 5lbs being taken off.
You're free to go where ever you get the answers you want rather than the proper answer. 

[scotth84]

right answer in your opinion this is a well used mod on omegas and vectras that is why courtney and regal do this upgrade and they are known for good power  out puts as regal hold 1/4 mile time at silverstone!!!!

[Andy B]

right answer in your opinion this is a well used mod on omegas and vectras that is why courtney and regal do this upgrade and they are known for good power  out puts as regal hold 1/4 mile time at silverstone!!!!

But IIRC the Courtney 'upgrade' uses a flywheel from A N Other Vauxhall (maybe a Vectra) that uses a solid flywheel and not a dual mass ........
 
my opinion is the same as the other 'wrong' answer you got!

[scotth84]

Ultra Light Billet Steel Flywheel
We have managed to reduce the weight of the V6 flywheel to 5.6 kgs, that's a saving of 9.4 kgs. To achieve this we start with a block of billet steel. This is machined to the profile required. Using billet is the only way to get such a light unit whilst retaining maximum strength. These flywheels are outright purchase and no exchange unit is required.

This is the ultimate in V6 Flywheels.
Please note: Other less expensive billet flywheels on the market claim to be the lightest at 6.7kgs ..... they are in fact in excess of 1kg heavier than our product!

2.5 V6 Lightweight Billet Steel Flywheel - £275. Fitting £295
2.6 V6 Lightweight Billet Steel Flywheel - £275. Fitting £295
3.0 V6 Lightweight Billet Steel Flywheel - £275. Fitting £295
When using the V6 flywheel in Omega different flywheel bolts and clutch are required.  <<<<<<<<<   same fly wheel

[scotth84]

and before you say it  its 5.6 not 2.5 kg got that bit wrong

[Andy B]

Ultra Light Billet Steel Flywheel
We have managed to reduce the weight of the V6 flywheel to 5.6 kgs, that's a saving of 9.4 kgs. To achieve this we start with a block of billet steel. This is machined to the profile required. Using billet is the only way to get such a light unit whilst retaining maximum strength. These flywheels are outright purchase and no exchange unit is required.

This is the ultimate in V6 Flywheels.
Please note: Other less expensive billet flywheels on the market claim to be the lightest at 6.7kgs ..... they are in fact in excess of 1kg heavier than our product!

2.5 V6 Lightweight Billet Steel Flywheel - £275. Fitting £295
2.6 V6 Lightweight Billet Steel Flywheel - £275. Fitting £295
3.0 V6 Lightweight Billet Steel Flywheel - £275. Fitting £295
When using the V6 flywheel in Omega different flywheel bolts and clutch are required.  <<<<<<<<<   same fly wheel

You seem to have a slight contradiction in your post!   
The flywheel is machined from a single block of steel/billet so isn't the original dual mass.
Anyway, I'm sure that you'll be able to notice the difference against over a ton & a half of car.
And a different clutch is required because in the original Omega fitment, the clutch plate itself is NOT sprung, that's being done by the flywheel. If you then replace the dual mass with a solid flywheel you'll then need a conventional sprung clutch plate. But I'm sure you know all that. 

[Turk]

By the time you've done all you intend doing to the car, how much d'ya reckon it will cost ?

[Ian_D]

IMHO I don’t think the flywheel would make THAT much difference. That said, I've never been in one that’s had a lightened flywheel! 

As for the air intakes.... Again, most members on here will say to leave them alone because they work very very well with the engine; and it’s because of the intake system that the engine has a very flat torque curve. 

Just because everyone says 'don’t do this, and do that' doesn't mean to say you can’t experiment... God if everyone thought like that the world would be so boring! 

End of the day, if you can get the air pipes made cheaply, why not give it a go? What you got to loose? A few quid and a couple of hour’s maybe? Not the end of the world if it doesn’t workout as planned.(providing you don’t bin the original setup! )

Whatever you decide to do, let use know your results, Good OR bad, im interested even if nobody else is! 

[Kevin Wood]

I have fitted a lightened flywheel to my Westfield so have some "before and after" experience on the matter, albeit not on an Omega.

IIRC, I started off with about 18 Kg of flywheel and ended up with 5.5. On a 600Kg car that's a worthwhile weight reduction in itself. Not on a 1700Kg car though.

There is less energy used in spinning-up the flywheel as you accelerate, of course, but probably no more than a couple of horsepower even in first gear, and the rate of change of RPM is so slow in the higher gears it really is irrelevant. I certainly noticed no increase in in-gear acceleration.

The main (probably only) benefit is that when changing up the engine revs decay quicker meaning that you can grab the next gear quicker and without a load of stored momentum in the flywheel being unleashed suddenly when you drop the clutch and causing you to break traction. This is an observation based on an engine that redlines at 7400. Not sure it would be as valid on a lower-revving V6, which has more inertia anyway, regardless of the flywheel.

The other thing to consider is that less flywheel will make the car more prone to stalling when pulling away and during urban driving, something that will be worse with a heavier car, of course.

Personally, it wouldn't be that high up my Omega tuning wish-list.

Kevin

[Omegatoy]

lightened flywheel or solid state lighter one,
been there done it, it makes a hell of a difference on big gm lumps, car pulls harder and spools up quicker, no tickover or driveabaility problems although it dies make it slightly easier to stall it!! simplyreplace the centre plate for a similar sized one that has springs in it rather than the dual mass one and it works a treat!!

cant help on the airintake silencer bud, but would think it would make a small difference ans the original was tuned for noiose reduction rather than ultimate performance?