Omega Owners Forum

Chat Area => General Car Chat => Topic started by: chrisgixer on 17 July 2014, 19:25:06

Title: Poly
Post by: chrisgixer on 17 July 2014, 19:25:06
...does it get softer in warm weather, or the warmer the poly gets?
Title: Re: Poly
Post by: RobG on 17 July 2014, 19:27:36
...does it get softer in warm weather, or the warmer the poly gets?
Polyurethane, polyethylene, polyester, polystyrene, polypropolene :-\
Title: Re: Poly
Post by: Field Marshal Dr. Opti on 17 July 2014, 19:37:30
...does it get softer in warm weather, or the warmer the poly gets?
Polyurethane, polyethylene, polyester, polystyrene, polypropolene :-\

Polly put the kettle on. :)
Title: Re: Poly
Post by: chrisgixer on 17 July 2014, 19:39:28
...does it get softer in warm weather, or the warmer the poly gets?
Polyurethane, polyethylene, polyester, polystyrene, polypropolene :-\

Opps off Rob ;D

Like you never met me or know my favourite subject ;D
Title: Re: Poly
Post by: chrisgixer on 17 July 2014, 19:51:43
Given those rear donuts where rock hard on the shelf in my garage over the winter, and are now quite squidgy  to press a thumb into, I'm guessing yes. Poly does get softer with heat.

...as the back end if my car is all over the place. (Relatively speaking) and explains the more compliant ride in warm weather.
Title: Re: Poly
Post by: 05omegav6 on 17 July 2014, 19:57:00
Have your bushes done what mine did, or did you fit them that way round from the get go :-\
Title: Re: Poly
Post by: chrisgixer on 17 July 2014, 19:59:27
Have your bushes done what mine did, or did you fit them that way round from the get go :-\

Er, remind me. What did yours do? :-\
Title: Re: Poly
Post by: 05omegav6 on 17 July 2014, 20:38:40
You turned the top pads over :y
Title: Re: Poly
Post by: chrisgixer on 17 July 2014, 20:46:03
You turned the top pads over :y

I did? :-\
Title: Re: Poly
Post by: TheBoy on 17 July 2014, 21:49:17
I wonder if that's why the Silver Bullet was a bit tail happy earlier.  I'd just put it down to shit tyres ;D
Title: Re: Poly
Post by: biggriffin on 17 July 2014, 21:58:11
Polyurethane is hot extruded, will go more pliable,with heat, when fitted to car out of high temps, should remain in tolerance.
but somebody with letters or a better edumaction will be along soon.
Title: Re: Poly
Post by: tidla on 17 July 2014, 22:37:51
The heatwave weather (one day ::) ) has stopped the front wishbones squeaking on the speed bumps.

Then again it could be the cheap rear bushes i got stuck with fitting.
Title: Re: Poly
Post by: Seth on 18 July 2014, 00:15:02
Given those rear donuts where rock hard on the shelf in my garage over the winter, and are now quite squidgy  to press a thumb into, I'm guessing yes. Poly does get softer with heat.

...as the back end if my car is all over the place. (Relatively speaking) and explains the more compliant ride in warm weather.

Gave the TD a good blast along the M4 to/from work today ... first time in months, and felt that the arse end was maybe a bit ... err ... loose.

Still, sod it ... sheer relaxed comfort, cruising effortlessly into the sunset listening to that silky-smooth BMW 'straight-six' in full cry. Enjoyed every second of the experience! :y

Sod the 'soft' polys ... ;D
Title: Re: Poly
Post by: 05omegav6 on 18 July 2014, 01:15:54
You turned the top pads over :y

I did? :-\
You did ::)
Title: Re: Poly
Post by: chrisgixer on 18 July 2014, 01:53:56
You turned the top pads over :y

I did? :-\
You did ::)

Can't remember that. Although I've packed mine out with the oe rubber pad as well. Just in case the slightly loose poly pad was having an effect. It wasn't, and it's now transmitting some noise.

Point is its packed together as tight as a nuns chuf, but still loose by feel, and looser still at the indicated 27c on the CID when booting it out of a round about.

(By loose I mean a bit more movement than normal. Still not as much as oe in a turn. But more than oe re tramlining (road affecting track of the rear end)
Title: Re: Poly
Post by: 05omegav6 on 18 July 2014, 03:25:53
Diff mounts then :-\
Title: Re: Poly
Post by: chrisgixer on 18 July 2014, 07:32:34
Diff mounts then :-\

They are like new. Unusually.
Title: Re: Poly
Post by: chrisgixer on 18 July 2014, 07:34:46
Australia must give much more squidgy handling cars. :-\
Title: Re: Poly
Post by: chrisgixer on 30 August 2014, 10:39:46
During the recent colder temps, the ride has noticeably firmed up.

Driving round East Ham residential areas due to a closed m11(?) the ride was very unpleasant.

But then the roads are ridiculously appalling round there. Massive concrete speed bumps with a very harsh transition. Brick mini roundabouts you have to drive over due to parked cars.

To compensate, Tyre pressure adjustment due I think, but just in time for temps to rise again going by the forecast as Bertha clears off.

Considering re fitting oe rear donuts to get a comparison again.
Title: Re: Poly
Post by: chrisgixer on 30 August 2014, 10:42:19
I wonder at what temp poly melts? And will a microwave do the job?


Thinking about filling voids in oe rubber bushes....?
Title: Re: Poly
Post by: RobG on 30 August 2014, 11:01:49
I wonder at what temp poly melts? And will a microwave do the job?


Thinking about filling voids in oe rubber bushes....?
240° C
Title: Re: Poly
Post by: aaronjb on 30 August 2014, 11:07:10
I though most folks used something like windscreen glue for filling voids - bonds nicely, stiff, comes in a tube.. rather than trying to melt old bushes in the wife's microwave ;)
Title: Re: Poly
Post by: chrisgixer on 30 August 2014, 11:08:51
I though most folks used something like windscreen glue for filling voids - bonds nicely, stiff, comes in a tube.. rather than trying to melt old bushes in the wife's microwave ;)

Tried sikoflex. Didn't bond at all. Guessing some sort f release agent on the rubber from moulding.
Title: Re: Poly
Post by: Sir Tigger KC on 30 August 2014, 12:51:02
Australia must give much more squidgy handling cars. :-\

There's a lot of long straight roads in Australia, notably the '90 mile straight' on the Nullarbor Plain!  :)
Title: Re: Poly
Post by: chrisgixer on 30 August 2014, 13:20:56
I though most folks used something like windscreen glue for filling voids - bonds nicely, stiff, comes in a tube.. rather than trying to melt old bushes in the wife's microwave ;)

Tried sikoflex. Didn't bond at all. Guessing some sort f release agent on the rubber from moulding.

Also, the sikoflex I used, whatever it was there's a few, was by no means firm when set. So pointless ultimately.
Title: Re: Poly
Post by: 05omegav6 on 30 August 2014, 21:18:26
You turned the top pads over :y

I did? :-\
You did ::)

Can't remember that. Although I've packed mine out with the oe rubber pad as well. Just in case the slightly loose poly pad was having an effect. It wasn't, and it's now transmitting some noise.

Point is its packed together as tight as a nuns chuf, but still loose by feel, and looser still at the indicated 27c on the CID when booting it out of a round about.

(By loose I mean a bit more movement than normal. Still not as much as oe in a turn. But more than oe re tramlining (road affecting track of the rear end)
Looks like you found the answer to this today then... :-\
Title: Re: Poly
Post by: chrisgixer on 30 August 2014, 21:21:01
You turned the top pads over :y

I did? :-\
You did ::)

Can't remember that. Although I've packed mine out with the oe rubber pad as well. Just in case the slightly loose poly pad was having an effect. It wasn't, and it's now transmitting some noise.

Point is its packed together as tight as a nuns chuf, but still loose by feel, and looser still at the indicated 27c on the CID when booting it out of a round about.

(By loose I mean a bit more movement than normal. Still not as much as oe in a turn. But more than oe re tramlining (road affecting track of the rear end)
Looks like you found the answer to this today then... :-\

Yes poorly fitted by some idiot ::) ;D. Top pad on rear drivers donut not seated correctly.


However the temperature does affect them.

Title: Re: Poly
Post by: 05omegav6 on 30 August 2014, 21:33:24
 ;D

I suspect that the original rubber components are similarly affected by temperature, therefore any improvement made by fitting poly would apply equally in any given climate :-\
Title: Re: Poly
Post by: chrisgixer on 30 August 2014, 21:47:32
;D

I suspect that the original rubber components are similarly affected by temperature, therefore any improvement made by fitting poly would apply equally in any given climate :-\

No I don't agree there. Rubber bushes are not affected by temp when it comes to driver feel.

Variations in ride hardness is something I noticed before rear donuts where fitted, but with poly fronts. It was defo ambient temp related but I couldn't work out what component was affected. Tyres? Suspension? :-\ it was like taking 5-7 psi out of the tyres re ride feel. But as tyre would loose stability at those pressures it couldn't if been those. Suspension.... Feel a bit thick now I've worked it out, although time will confirm further as temps are due to go up, then winter approaching.

Can't explain why but this minor fault has helped confirm it, to me at least.

The ideal seems to be between 17c and 23-4c. Harsher below. Softer above.


...but as said, will confirm later, just to be sure. :)