Possible to make raised suspension softer??

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adriches
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Post by adriches »

http://greg.saunier.free.fr/Img_perso/s ... n405x4.jpg

Any good? 1 sphere for both sides.

No it wasn't hard at normal level. Normally you press the button in the boot to raise it fully, and its very firm once at top. I don't have it all the way up running normally, but not too far off!
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docchevron
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Post by docchevron »

good point there Graeme, I hadn't considered that it would be running THAT much higher, but the post above does give an indication that it may be getting friendly with the stops!

Exactley how much have you raised the ride height here?
It could be too far!

Interesting schematic, I didn't realise they only had one sphere!
Could be that it's died... it must work extremley hard!
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Post by MULLEY »

Sorry guy's, i thought this was a total wind-up even after Doc said it wasn't, i thought you were continuing the gag on the 1st page :oops: Never seen a 4x4 405, so had no idea that it was hydraulic. Erm, does it have a hydraulic pump of sorts?
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Post by kiwi »

MULLEY wrote:Sorry guy's, i thought this was a total wind-up even after Doc said it wasn't, i thought you were continuing the gag on the 1st page :oops: Never seen a 4x4 405, so had no idea that it was hydraulic. Erm, does it have a hydraulic pump of sorts?
Well what do you know a half breed BX, well guess had to be around given what engines we use in the BX.

Still reckon Aussie Frogs might have the answer your looking for being an all makes French club.

Oh and yes an apology for the reflex on yet another spammer.
adriches
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Post by adriches »

Thanks for the replies. So if you guys were to drive along in the high setting would it be hard and bouncy or normally?? If normally, must be my sphere.
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Post by mat_fenwick »

If we are on high then it's bouncy too. If it was OK on normal then that would suggest your sphere is OK.

How about spacer blocks between the subframe and the body?
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Post by Kevin B »

How did you raise the ride height mate?
Unlike the suspension system you would see on a BX 4x4 this system is somewhat more complicated than exen the BX.

On the non 16V Peugeot 405 4x4 the ride height is controlled by the position of a variable resistor which is connected to the anti-roll bar, by a plastic link which is able to pivot. Somehow this resistance value is then transmitted to the dedicated 12V hydraulic pump mounted on the rear subframe, depending on the position of the antiroll bar. Only the Mi16v 4x4 version has an engine driven hydraulic pump.

From memory I believe the Peugeot 405 4x4 only has one suspension sphere, but it has no restrictor in it, making it look almost like an accumulator sphere from a BX.

I do have some remaining parts from a Peugeot 405 4x4 rear suspension setup from a scrapyard donor, I aquired when I needed parts for a BX 4x4, PM me if interested.
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Post by mat_fenwick »

Ah, so I wasn't dreaming it then! I knew the Mi16x4 had an engine driven pump as I got the 205 engine from one - was going to use the exhaust cam pulley to drive a PAS pump. But I thought | remembered working on a 405 with an electric suspension pump...
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Post by Kevin B »

Ah, so I wasn't dreaming it then! I knew the Mi16x4 had an engine driven pump as I got the 205 engine from one - was going to use the exhaust cam pulley to drive a PAS pump. But I thought | remembered working on a 405 with an electric suspension pump...
Have you still got the gearbox and transfer gearbox from that car, if so I would be interested if its still any good, as a means to possibly getting a dead Bx GTi 4x4 back on the road that has the usual spline problem, which is a long term restoration project. As I understand the MI16x4 has a tougher spline drive between gearbox and transfer box.
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Post by adriches »

If anyone is interested.....

'The psa 4wd system comes in 4 levels of sophistication and the 405 glx4 is equiped with the simplest of them. This runs to a permanent front/rear torque split and manually selected lockable center and rear differentials. The bx estate is 1 step up with its limited slip rear diff, the bx gti improves on this with a torsen rear diff and the mi16 goes all the way with an automatic torque apportioning center diff and torsen rear end.'

My 405 is a 1.9 td estate with full mi16 4x4 system and rear suspension.
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Post by adriches »

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Post by mat_fenwick »

adriches wrote:My 405 is a 1.9 td estate with full mi16 4x4 system and rear suspension.
Interesting - my dream drivetrain system, shame it's in the 'wrong' shell... :P Do you find the gearing an issue at all? IIRC it's some 40% lower in 5th.

Kevin B - PM sent.
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Post by adriches »

Yes but then you can use bigger tyres (good for off road!) and it will bring it right rather than having too taller gearing!
With 185 65 15s which are fairly small and fit easily, 70mph is roughly 3200 rpm. So I'm hoping with bigger ones it will be perfect!!
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Post by Kevin B »

'The psa 4wd system comes in 4 levels of sophistication and the 405 glx4 is equiped with the simplest of them. This runs to a permanent front/rear torque split and manually selected lockable center and rear differentials. The bx estate is 1 step up with its limited slip rear diff, the bx gti improves on this with a torsen rear diff and the mi16 goes all the way with an automatic torque apportioning center diff and torsen rear end.'
You forgot to mention that the BX also has the additional feature in that the centre diff can also be locked up, so as to provide extra traction on slippery surfaces.

What a system the 4WD could have being for both Peugeot and Citroen. Apart from the Peugeot 406 Mi16x4 they decided to make the coupling splines between the gearbox and transfer box of insufficient size. This cheapening up process for the lower spec 4x4 systems must have saved all of £10/car.
Interesting - my dream drivetrain system, shame it's in the 'wrong' shell...
With all these 4x4 Bx's coming out of the woodwork lately you could have realised that dream :wink:

Who would have thought it, that the least desirable BX of them all, is now becoming quite collectable.
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Post by MULLEY »

I really don't understand the logic of a hydraulic system just for the rear of a 405? why not use conventional springs?
2002 C5 2.0 HDI Estate - Jasmine - Now SORN
2011 Mini Cooper D Clubman - SOLD
2016 Mercedes A180D Sport - Auto refinement
1992 TZD Turbo - Bluebell - My daily
1991 Gti 16V - Blaze - crash damaged, will get repaired.
1990 Gti 8Valve SOLD - looks like it's been scrapped
2002 Mini Cooper S - SOLD - i miss this car
1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN

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