Swap fron Hydro to rubber

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Sean1380
850 Super
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Joined: Thu Jun 24, 2010 2:58 pm
Location: Johannesburg, South Africa

Swap fron Hydro to rubber

Post by Sean1380 »

Hey guys

A good mate of mine just bought a 1275 South African Cooper S Mk1, complete with its Auzzy spec doors

BUT

It does have hydro, and partially collapsed hydro at that, to swap to normal cone and do-nut does he have to swap out the complete subframes ?

Sean
mk1
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Re: Swap fron Hydro to rubber

Post by mk1 »

Sean,

No he doesn't. The doghnuts will fit in the hydro frame acceptably. Its not a conversion I have ever done, but I know a lot of folks have.

BUT REMEMBER TO TELL YOUR MATE THIS!

The Hydro displacers he is removing are worth more than GOLD! There are hundreds of people who would give their right arm for a genuine S displacer or two. DO NOT whatever you do let your mate muller them when he takes them out.

Even with the cost of shipping from SA they will sell in about 5 minutes flat. You just watch.
cheleker
998 Cooper
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Joined: Fri Jun 25, 2010 4:40 am
Location: Seattle, WA, USA

Re: Swap fron Hydro to rubber

Post by cheleker »

To fit the cones to the subframes, the locking mechanism which holds the hydro bags in place has to be bent back out of the way, as I recall. In the interest of saving wet subrames, I suggest swapping it for dry.

If the conversion is to coil springs, then no change is needed. The springs clear the locking mechanism. (At least the two versions of the springs I've done will clear. Haven't tried the Japanese springs.) N.B. The spring conversions were done at the insistence of the car owners. As an installer, I like doing them. A little easier than cones. As an driver, I don't like them...but that's another topic.

If you retain the hydro front, upper arms rather than swapping to dry arms, you'll get a little stiffer front suspension because of the location on the knuckle joint. Not a bad thing to do. You'll have to drill out the hole for the lower shock mount is all.

You'll also need to do some playing with the rear ride height. The rear arms are different and the wet arms will really drop the car down.
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