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Author Topic: coilovers  (Read 2154 times)

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dillan

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coilovers
« on: 07 April 2013, 15:07:29 »

any one know were you can get coilovers for a omega in the uk that wont cost a arm and a leg to buy

or does any one know of coilovers that will fit off a other car ?
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symes

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Re: coilovers
« Reply #1 on: 07 April 2013, 15:14:38 »

why-Omega is a tourer not a racing car-get a Vectra or Astra if you want sports mate IMHO
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feeutfo

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Re: coilovers
« Reply #2 on: 07 April 2013, 15:36:51 »

Depends, what do you want from the suspension, exactly?
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dillan

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Re: coilovers
« Reply #3 on: 07 April 2013, 17:31:02 »

low n stiff/hard so it dosnt have as much body roll when side ways :)

lol i dont want sports fwd cars
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albitz

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Re: coilovers
« Reply #4 on: 07 April 2013, 17:58:13 »

why-Omega is a tourer not a racing car-get a Vectra or Astra if you want sports mate IMHO

Why ? Theres quite a few people on here who spend small fortunes on shocks,springs,bushes,tyres etc. Seems a tad pointless to me, would be easier to just buy an Imprezza,evo,or whatever,but they dont get slated for it,as the "each to their own" principle is understood.
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symes

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Re: coilovers
« Reply #5 on: 07 April 2013, 18:15:54 »

why-Omega is a tourer not a racing car-get a Vectra or Astra if you want sports mate IMHO

Why ? Theres quite a few people on here who spend small fortunes on shocks,springs,bushes,tyres etc. Seems a tad pointless to me, would be easier to just buy an Imprezza,evo,or whatever,but they dont get slated for it,as the "each to their own" principle is understood.
the cost of coil overs for an omega would be huge-as would probably have to be specially made-surely cheaper/easier to go polybush route etc? as quite a few on here have done this  :y
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05omegav6

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Re: coilovers
« Reply #6 on: 07 April 2013, 18:30:42 »

Turning the OPs question on its head for a second...

Take two basically identical, performance oriented saloon cars, (VXR8 both 6.2 autos, one a standard car, tother a Bathhurst S) and fit coilovers to one of them. Does that instantly make it a better car :-\ What are the pros and cons for fitting coilovers :-\

I know the Bathurst has adjustable suspension and that the S has a big fat supercharger, but do coilovers really bring anything to the party? Or is it better to buy the base car and budget for fitting the blower :-\
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TheBoy

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Re: coilovers
« Reply #7 on: 07 April 2013, 19:04:00 »

I believe the jury is still out of whether, compared to seperate shock/spring, if coilovers do offer genuine advantages, or if hype over function. Obviously the usual chavvy tuning companies will say they are an improvement, as its their income  :-X

Obviously, one advantage is the ability to adjust stiffness and ride height, but we already know what works well for Omegas without compromising ride quality :)
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05omegav6

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Re: coilovers
« Reply #8 on: 07 April 2013, 19:13:02 »

Roughly translated to 'Save 11k and buy a supercharger down the road'...
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symes

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Re: coilovers
« Reply #9 on: 07 April 2013, 19:16:32 »

coil overs were designed for 2 reasons--weight----you only need one mounting point not two AND-adjustability-easier to dial in compression/rebound/height  :y
on a competition car-you can set up for different tracks/weather conditions
so make up your own mind as to benefits on an omega
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TheBoy

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Re: coilovers
« Reply #10 on: 07 April 2013, 19:20:43 »

coil overs were designed for 2 reasons--weight----you only need one mounting point not two AND-adjustability-easier to dial in compression/rebound/height  :y
on a competition car-you can set up for different tracks/weather conditions
so make up your own mind as to benefits on an omega
Not sure much weight saving (excluding materials used etc) when used on a MacP strut, as it'd use same mountings.

Rear might give some weight savings, but not drastic, as the swing arm and subframe still need to be clunky in those areas. Never looked closely how much clearance a saloon shock has from tyre...
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Selseybill

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Re: coilovers
« Reply #11 on: 07 April 2013, 19:24:31 »

The previous owner of my old MFL saloon fitted coil overs. Tramlined everywhere even after a full set up by Wim. Felt every little bump like a old Mini and pushing it around a damp, bumpy bend used to make the car jump everywhere. I took them off and just fitted a good set of lowering springs instead. Migs were meant to be a luxury car not a sports car. If you want to stiffen it up fit poly bushes everywhere.
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feeutfo

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Re: coilovers
« Reply #12 on: 07 April 2013, 19:58:48 »

low n stiff/hard so it dosnt have as much body roll when side ways :)

lol i dont want sports fwd cars

Ok, don't want to be picky but coil overs aren't for omega. Not in the true sense of the word anyway. Reason being the rear has a totally seperate shock from spring set up. So a coil over spring (coilover) is not applicable there.

Nor is it appropriate on the front. Omega has McPherson strut front suspension. It might seem a minor point, but this involves an offset spring v shock alignment where the spring centre line is aimed directly at the bottom steering knuckle/ball joint on the wishbone. Where as the shock is angled differently within the spring and points in board for various reasons. A traditional coil over spring set up does not allow for this.

To be more helpful, we need to understand the set up v ride height issues that will affect tyre wear. If its lowered too far, the camber angles start to wear tyres massively to the point the adjustment required is not possible without fitting camber adjustment bushes at the rear, beyond 20mm lowering. Front is more forgiving.

15mm lower than standard = omega Mv6 lowed sports chassis. Gm parts only. Pm Andyc on here for tc prices.
Beyond that it starts at 30mm drop and aftermarket parts and tyre wear becomes an issue so camber needs to be carefully checked that its within spec on the rear. And be aware that fully loading the car will put the camber out of spec. causing inner edge wear.

30mm drop. Beware rear ride height(try to stay within 20mm drop)

Springs, Irmscher are considered best but very difficult to find. Eibach, Stienmetz being slightly softer than Irmscher but still plenty firm enough to stop excess roll.

Shocks.
Gm oe shocks for mv6 lowered sports chassis will take 30mm drop, but no more. Andyc.
Bilstein b4 will also take 30mm drop without issue.

Balance motor sport stroke eibach, Bilstein etc. or just google for prices.

IMO...
Irmscher springs and bilstein b4 shocks give an excellent Balance of firmness to avoid roll, but still compliant enough to give comfortable ride. 30mm drop but with the rear raised back up 10mm to keep the rear camber in spec. By placing an extra pad under the rear springs.

Hope helps.


Avoid coil overs. ;)
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Andy89

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Re: coilovers
« Reply #13 on: 07 April 2013, 23:40:00 »

I don't see why he should avoid coilovers
I got kw v2 coilovers on my omega and they work great,  cheap coilovers can make the car jump everywhere as said earlier
So if I money is an issue, i'd say go for lowering springs

2woody

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Re: coilovers
« Reply #14 on: 07 April 2013, 23:40:54 »

the term "coil-over" is a bit of a misnomer.

it is possible to adopt a concentric coil-over-spring unit to the front of an Omega B, but this will be at the cost of severely reduced wheel travel, poorer handling and steering finesse.

I believe that Koni do an adjustable damper, which could be retro-fitted with an adjustable spring platform.

undoubtedly, best handling is going to be at standard ride height, to which harder springs could be fitted. They will reduce body roll only be a very small amount, tho.
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