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Why AVO's will NOT fit correctly and how to fix it.
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calex_fr
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Joined: 18 Jul 2008
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Location: Champagne (France)

PostPosted: Wed Oct 15, 2008 10:39 am    Post subject: Reply with quote

Question :

Has anybody fit other (new) shocks than AVO in him Olympic ?

(perhaps there is an other solution than AVO ?)
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Alexandre Contat

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Rodsmith
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Joined: 16 Jun 2008
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Location: Pembrokeshire, West Wales

PostPosted: Wed Oct 15, 2008 9:42 pm    Post subject: Reply with quote

I made an initial contact with the Gaz agent- they will make whatever is wanted if we give them the measurements and a few other details like weight etc and they can decide on spring rates if wanted. They will get back to me with a price in the next few days. However, I am with Dave here to try and get the existing AVOs to work, and save probably £125 a corner!! The rear ones look as if they would be better with a loop at each end and not a stem, to prevent them binding. This would mean adapting the mounting points on the car, top and bottom.
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zefarelly
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PostPosted: Thu Oct 16, 2008 7:57 am    Post subject: Reply with quote

I'm not going to fit stem ended rear dampers to my car, I just cannot fathom how the hell it can possibly work . . . .I'll draw something proper up and post a pic
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Paul Narramore
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Location: Aylesford, Kent.

PostPosted: Thu Oct 16, 2008 8:45 am    Post subject: Reply with quote

Joe

I think the stemmed ended dampers work because as the the suspension moves up and down, it allows a small amount of movement in more than one direction.

Think of the suspension units on the rear of a motorcycle. They always have bushes in a ring, but that's because all the rear swing arm has to do is move up and down in a slight arc.

With the solid axle on an Olympic, the axle moves up and down, as well as the body, often one wheel will move and not it's neighbour ie the axle will 'tilt' when viewed from behind. With a ring-type bush, it's not really intended to accept a tilt in that direction, is it?

My concern is this. With the stems sunk into the bottom of the rear trailing arms, the bottoms of the stems are pretty close to the road surface and could/may/will be damaged in the event of a rear tyre puncture.
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zefarelly
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PostPosted: Thu Oct 16, 2008 9:46 am    Post subject: Reply with quote

I was thinking rose joints top and bottom with C section brackets . . . bolted to the shell and welded to a trailing arm.
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Rodsmith
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PostPosted: Thu Oct 16, 2008 10:23 am    Post subject: Reply with quote

How long is a piece of string.......or rather how long would a rose joint be reasonably expected to last in a situation like that? Have they any means of lubrication, I note some are PTFE lined? A rose joint may be the answer, unless they have to be changed every few thousand miles. Will they be too hard on the bodyshell without a rubber bush?

Rod
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zefarelly
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PostPosted: Thu Oct 16, 2008 11:11 am    Post subject: Reply with quote

I'm building a competition car (or at least trying to) so probably thinking slightly differently to some, rose joints are pretty tough though, and if the springs and dampers do their job ( along with poly bushes) I don't see why they wouldn't last.

as an aside, most race circuits are far smoother than public roads
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calex_fr
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Joined: 18 Jul 2008
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Location: Champagne (France)

PostPosted: Thu Oct 16, 2008 11:28 am    Post subject: Reply with quote

zefarelly wrote:
I'm building a competition car (or at least trying to) so probably thinking slightly differently to some, rose joints are pretty tough though, and if the springs and dampers do their job ( along with poly bushes) I don't see why they wouldn't last.

as an aside, most race circuits are far smoother than public roads


humm, you interesting me Wink
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Alexandre Contat

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Dave-M
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PostPosted: Thu Oct 16, 2008 11:31 am    Post subject: Reply with quote

I couldn't agree more with you Joe. It's inevitable that,because your car will be an out and out racer, you will tackle things in a different way to most of us.
My aim is to match the overall performance and handling of the Lotus Elan plus2
Your aim is for something quite different.
I am really looking forward to see your progress and what changes you make.
Regards
Dave


Last edited by Dave-M on Mon Nov 03, 2008 11:37 am; edited 1 time in total
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zefarelly
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PostPosted: Thu Oct 16, 2008 11:47 am    Post subject: Reply with quote

Dave-M wrote:
My aim is to match the overall performance and handling of the Lotus Elan plus2
Your aim is for something quite different.


yes, beat them with one of my precrossflow engines ! Rolling Eyes

seriously, as I've suggested to Richard in conversation, I've not got a clue how a standard car drives, but I can visible see how bad some of the suspension design is without it even being assembled, let alone driving the thing, it just looks wrong, and looks like it will fail, which it probably does/has

I think pliable bushed eye ended rear dampers should work and 'should' be a relatively easy mod for anyone who has a Rochdale ( I'm assuming 99% of owners look after their own cars)

the one thing I don't know is the ride height of the underside of the floor on a standard car . . . . the length of the rear dampers is going to be fairly critical . . .
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Dave-M
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PostPosted: Thu Oct 16, 2008 11:54 am    Post subject: Reply with quote

I am in the process of doing drawings of the front and rear suspension. I can plot these out at 50% or maybe even 66%. My plotter can only do 600mm wide
These drawings will show all pick up points relative to the bottom of the floor pan and the road.
They should be accurate enough to work from.
Will post up when done
Regards
Dave
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calex_fr
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Location: Champagne (France)

PostPosted: Thu Oct 16, 2008 12:01 pm    Post subject: Reply with quote

Dave-M wrote:
I am in the process of doing drawings of the front and rear suspension. I can plot these out at 50% or maybe even 66%. My plotter can only do 600mm wide
These drawings will show all pick up points relative to the bottom of the floor pan and the road.
They should be accurate enough to work from.
Will post up when done
Regards
Dave


good news Wink
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Alexandre Contat

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zefarelly
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PostPosted: Thu Oct 16, 2008 12:38 pm    Post subject: Reply with quote

top man, see my rtrailing arm idea on rear suspension thread . . .
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