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Make Your Own ....2CV.... 4x4
http://www.international2cvfriends.com/forum/viewtopic.php?f=19&t=3279		 Page 4 of 105
Author:  subarupete [ November 9th, 2011, 1:59 pm ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
Some pics.
Assemble suspension, still some fixing of spring cans and adjustments to do.
On the wish list are AK springs as I believe they are a lower lbs/inch softer?
Anybody know the spring rate?
Rear End.
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Front End.
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Author:  ken [ November 9th, 2011, 10:24 pm ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
pete,
haven't worked out the lbs/inch, but there's some info from Citroen in these tables.

Image
Springs 1 by slcchassis, on Flickr

Image
Springs 2 by slcchassis, on Flickr

Might be worth having a bit of a play around with calculating the rates of the springs
you've got, using this site.
http://engineersedge.com/spring_comp_calc_k.htm

Worth noting that with Citroen, you've got to expect the unexpected, since this was
what I found when I cut open a selection of the larger cans a while back.
I have a feeling that there's an Ami Super spring or two amongst that lot... :roll:

Image
Springs to mix and match. by slcchassis, on Flickr

ken.


subarupete wrote:
On the wish list are AK springs as I believe they are a lower lbs/inch softer?
Anybody know the spring rate?
Author:  subarupete [ November 9th, 2011, 11:15 pm ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
Ken thanks,
Know the rates and dimensions for a 2CV front spring by substitution should be able to determine the rate for an AK spring using http://engineersedge.com/spring_comp_calc_k.htm and use the 2CV data as a check.
Author:  ken [ November 9th, 2011, 11:38 pm ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
Peter,
it might be best to use the calculator on that particular site as a basis for comparison, rather than to determine absolute values, since the values it spits out for 'standard' 2CV springs don't match too well with the testing I had done elsewhere.

Don't know what values you have for standard springs, but I've worked on around 800 lb/in for the fronts, with the (shorter) rears being closer to 900 lb/in.

This calculator on this site seems to be more accurate, but you only get so many freebies before they stop the fun and ask for some $$$... ;)
http://www.planetspring.com/pages/compr ... ompression

ken.


subarupete wrote:
Ken thanks,
Know the rates and dimensions for a 2CV front spring by substitution should be able to determine the rate for an AK spring using http://engineersedge.com/spring_comp_calc_k.htm and use the 2CV data as a check.
Author:  subarupete [ November 18th, 2011, 5:34 pm ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
Drive Shaft Adapters.

Drilled and Tapped Gearbox Drive Flange.
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Test Fitted Adapters.
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Author:  Joolz [ November 18th, 2011, 11:53 pm ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
8-) What did you tap them to, 10mm I'm guessing, 1.5 or 1.25 pitch? Much easier than finding 9mm bolts.
I should do this myself, currently got the original bolts with spacers under the heads.
Author:  subarupete [ November 19th, 2011, 11:00 am ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
Hi Joolz,
Tap 10mm x 1.5. and use 10mm socket bolt, heads need to be reduced to fit, (drill/ flap disc as i dont have a lathe).
The 9mm socket bolts are hard to get. Have tried to source these, but min quantity would be 200+
Was going to use 10mm for the drive shaft as well but not enough metal.
The adapters came from Holland, getting them copied locally for the rear-end.
Author:  subarupete [ December 23rd, 2011, 1:38 pm ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
Hi Guys,
Your advice is sought, have attempted to fabricate some steering arms.
See pics.
Problem – have drilled thru the arm at the pivot point to < 12mm.
The 12mm bolt is a “tight fit” in the arm.
Can torque the nut/bolt tight, to put a crush load on the rod-end and spacers.
Will the bolt move and eventually “wear out” the steering arm????
Spend so far on one arm is £16.00, so shall I bin it?
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Author:  ken [ December 23rd, 2011, 3:43 pm ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
Pete,
it's surprising how difficult it can be to separate parts which have been bonded with high strength threadlocking/bearing fit compounds.

If the shank of the bolt isn't fully threaded, might be worth a shot with one of them, as they're capable of filling bondline gaps of up to 0.25mm, although the cure rate is slower then...

Trial pack;
http://www.ebay.co.uk/itm/ABRO-HIGH-STR ... 1301wt_698

or giant economy size;
http://www.ebay.co.uk/itm/Loctite-290-H ... 2548wt_932

ken
Author:  subarupete [ December 23rd, 2011, 3:57 pm ]
Post subject:  Re: Make Your Own ....2CV.... 4x4
Ken,
Thanks for that.
Can put the bolt in from the bottom with the permanent bonding stuff.
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