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331

General Car Chat / Re: Tram lining

« on: 11 March 2013, 21:14:32 »

certainly the tyre compound and tread pattern will have an effect.

in order to deflect to absorb the camber, the tyre would really need to be quite soft with a tread pattern able to move around a lot. Pattern a might not be as good as pattern b. then again pattern a when old might be better than pattern b.

I'm sorry, but all of this comes as no answer for someone with a tramlining car.

332

General Car Chat / Re: Tram lining

« on: 11 March 2013, 21:12:34 »

both omegas on the same size tyres ?

333

General Car Chat / Re: Tram lining

« on: 11 March 2013, 21:01:49 »

just a thought - do these tramlining cars all have the harder ( BMW ? ) bush in the wishbone ?

334

General Car Chat / Re: Tram lining

« on: 11 March 2013, 21:00:38 »

as an experiment, have we tried some "very tramlining" tyres on a car which doesn't do it.

tramlining is classicly defined as a poor reaction to road camber chages which results in a net steer effect.

things that make it worse are generally :-

wide, low-profile tyres. The wider and the lower aspect the worse it gets
poor chassis set-up. the vital adjustments and bush condition
poor suspension design. steering box, for example.
tyre construction and age

its not very difficult to get all of these in an Omega B

335

Omega General Help / Re: Failed, Gear selector

« on: 11 March 2013, 20:47:20 »

want a spare - I took one off yesterday

336

General Car Chat / Re: Tram lining

« on: 10 March 2013, 23:05:14 »

The tyre test aspect of the proposed airfield meet needs to be organised in such a way that all the tyres presented are tested on all the cars presented to give an accurate impression of their behaviour on any given suspension set up

actually, it would be well worth trying Chris's car on a different set of tyres.

also maybe on some 195/15s, too

337

General Car Chat / Re: Tram lining

« on: 10 March 2013, 23:04:01 »

yep - its tyres

So how do we nail down exactly what it is about tyres that cause it...?

Or, how do we know which ones to buy, that don't do it...?

we don't, unfortunately.

Out of the ten or so major design differences between tyre a and tyre b, we know maybe only two or three, so we can't answer the question I'm afraid.

338

General Car Chat / Re: Tram lining

« on: 10 March 2013, 23:01:58 »

Actually, no i don't think its the tyres....

to refine, my opinion is:-

235s are way too wide for a car with macpherson strut front suspension and a rear-mounted steering box. I'd say that all cars shod thus are only a smidging away from tranlining hell - all it takes is some small irregularity in the setup or a difference in one tyre make vs another to make all the difference.

339

Car Parts, bits For Sale & Wanted / Wanted - diesel diff

« on: 10 March 2013, 22:52:23 »

Anyone got a diff from an Omega B diesel ?

I'm specifically after a 3.45 ratio diff for an order I have

340

General Car Chat / Re: pre face lift elites

« on: 10 March 2013, 22:49:29 »

I've got loads of pre-F/L Elite parts. What you after.

341

General Car Chat / Re: 1.8 i vtec

« on: 10 March 2013, 22:48:24 »

that's simple - just use more revs.

the VTEC sacrifices low down power and torque for more power-per-litre higher up the rev range.

just think of your normal power curve, but shifted up a couple of thousand revs

time to explore the 7000 + part of the rev range my friend.

342

General Car Chat / Re: Tram lining

« on: 10 March 2013, 22:45:17 »

yep - its tyres

343

Omega General Help / Re: Do all omegas have HBV??

« on: 10 March 2013, 22:37:35 »

cool !

( as distinct from cold - obviously )

344

Omega General Help / Re: This could be the end for my Omega

« on: 10 March 2013, 21:44:47 »

have plenty of Carlton engines here......

what do you need ?

345

Omega General Help / Re: Do all omegas have HBV??

« on: 10 March 2013, 21:42:22 »

the HBV is there to remove the heated coolant from the heater matrix when the aircon is set to full low.

Apparently there were some Omegas with aircon but without HBV, but I've never seen one - GM actually list the hoses for such cars and they are available.

if you've removed the aircon or it doesn't work and you have no plans to fix it, or indeed if it came from the factory without, then HBV is of no use to you.