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Rear wheel steering on a murena!

Started by gizmo, June 03, 2007, 10:33:17 PM

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Anders Dinsen

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Re: Rear wheel steering on a murena!
#30
June 24, 2007, 11:21:14 AM
Quote from: Bart_Maztra on June 24, 2007, 10:16:36 AM
Quote from: Anders Dinsen on June 24, 2007, 04:52:49 AM
  • Tyre pressures must be right all way around. If the engine is as heavy as you say, you should probably go for the 2.2 numbers - 1.6 bar front, 2.5 bar rear.

1.6 / 2.5 bar? The manual says 1.6-1.8 front, 1.9-2.1 rear. I do 1.8 and 2.1.

The front end has to be quite soft to cope well with the lightness of that end, especially on the 2.2. Since your seem to have about the same weight distribution as the 2.2, you should go by those numbers. So I don't think you should follow the 1.6-numbers.

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Quote from: Anders Dinsen on June 24, 2007, 04:52:49 AM
  • Since you have replaced the rear springs and anti-roll bar, you should also uprate the front end to 2.2 spec, especially the anti-roll bar. The anti-roll bar is a lod transfer device and it transfers loads between tyres during cornering between the left and right tyres, as well as the front and rears.

What is "2.2 spec"? So a thicker anti-roll bar. What else?

Torsion bars, i.e. the springs. I don't remember if the dampers are different too, but if they are, then uprate them too.

But start with the tyre pressure, I have received a few good lectures from Roy Gillard about this :) In one case, when his car was new, he almost lost the rear end in a roundabout (if I remember him correctly) because tyre pressure was set incorrectly by a garage. Getting it right (1.6/2.5 bars) cured the oversteer tendency for him.

- Anders
1982 Talbot Matra Murena 2.2 prep 142 (under restoration)

Used to own:
2001 Renault Matra Grand Espace "The Race" V6 24v
1997 Renault Matra Espace 2.0 8V
1987 Renault Matra Espace J11 2.2

Laurens

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Re: Rear wheel steering on a murena!
#31
June 24, 2007, 02:18:53 PM Last Edit: June 24, 2007, 04:42:28 PM by Lennart Sorth
I don't know what is wrong with barts setup

ik have koni at 75% on my murena, with shortened 2.2 springs. i have a 1.6
in front i also had monroe. and original torsion bars. i have seen barts murena. and when i push the back down, it is as stiff as mine.

I had an excellent road holding with my murena, accept the front was leaning to much.

now i have koni's in the front, the roadholding is even better.

can't carjoy help you bart?

krede

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Re: Rear wheel steering on a murena!
#32
June 24, 2007, 03:21:15 PM Last Edit: June 24, 2007, 04:42:03 PM by Lennart Sorth
QuoteWhat is "2.2 spec"? So a thicker anti-roll bar. What else?

To the best of my knowledge.. thats the only difference .

gizmo

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Re: Rear wheel steering on a murena!
#33
July 01, 2007, 08:40:33 PM
Quote from: Bart_Maztra on June 24, 2007, 10:16:36 AM
Quote from: Anders Dinsen on June 24, 2007, 04:52:49 AM
  • Tyre pressures must be right all way around. If the engine is as heavy as you say, you should probably go for the 2.2 numbers - 1.6 bar front, 2.5 bar rear.

1.6 / 2.5 bar? The manual says 1.6-1.8 front, 1.9-2.1 rear. I do 1.8 and 2.1.



See my comments on tyre pressures under the 'wheels and tyres' thread.

Murena 2.2
Toyota MR2
Porsche 924
Mazda MX5
Reliant Scimitar GTE
Volvo 480 turbo
BMW series 3
Volvo 760 Estate
Honda 550 motorcycle

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