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Discussion Starter · #1 ·
I'm rebuilding my entire suspension setup right now and I was wondering if anyone knew off hand a couple of things.

I was thinking about buying and cutting the Mustang II springs from speedway motors (Mustang 2 springs - Speedway) for the front, and then cutting the front springs 1 coil, and moving them to the rear.

My big question is, what does anyone know off hand how much cutting 1 coil from the front springs that are going to the rear will do to the ride height?

I'm sure @RallyBob has all the suspension formulas I need ;)
 

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My big question is, what does anyone know off hand how much cutting 1 coil from the front springs that are going to the rear will do to the ride height?
The front springs are much longer than the rear springs. If you cut one coil from the front springs and put them in the rear, the car will be about 3” taller out back.

I don’t have specific formulas, but in general your starting point should be to make the front spring about one coil taller than the stock rears, then go from there.
 

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Just to give you an idea.

In these pics, the shorter springs are fronts, and are 400 lb rate. They are almost 1/2 the length of stock front springs.

The rears are cut down front springs. They ended up being about 180 lbs at that length.
434726
434728
434729
 

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I'm not sure what offset your wheels have, but be careful about the inner wheel well lips. On one of my Mantas I used Ascona wagon springs, and cut a coil or two (don't remember how many - it was 30 years ago). I had a couple different sets of wheels, the Ronal (BBS look alikes) rubbed so I had to use my minilites which worked, but I had to do some inner sheet metal mods because it would rub in full turn.
 

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Discussion Starter · #8 ·
I'm not sure what offset your wheels have, but be careful about the inner wheel well lips. On one of my Mantas I used Ascona wagon springs, and cut a coil or two (don't remember how many - it was 30 years ago). I had a couple different sets of wheels, the Ronal (BBS look alikes) rubbed so I had to use my minilites which worked, but I had to do some inner sheet metal mods because it would rub in full turn.
I believe my wheels are 30mm offset. They're the GM stamped ATS classics.
 

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A little late but perhaps it might help:
When I left the Navy I attached a little U-haul trailer to my Manta and the rear-end promptly sagged to the ground.
To the rescue the old Opel mechanic I had befriended: bring that sucker right on over and we'll have you going in no time.
He popped in 1954 'wagon' springs, no mods no nothing, slipped in like butter like they were made for the car.
Best damn thing I ever installed. Not only did I tow that trailer as if it wasn't there but after the towing was done that rear-end sat up nice and perky and handled LIKE A DREAM.
Now if only I knew more about the springs other than being from 54 'wagon'...
 

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A little late but perhaps it might help:
When I left the Navy I attached a little U-haul trailer to my Manta and the rear-end promptly sagged to the ground.
To the rescue the old Opel mechanic I had befriended: bring that sucker right on over and we'll have you going in no time.
He popped in 1954 'wagon' springs, no mods no nothing, slipped in like butter like they were made for the car.
Best damn thing I ever installed. Not only did I tow that trailer as if it wasn't there but after the towing was done that rear-end sat up nice and perky and handled LIKE A DREAM.
Now if only I knew more about the springs other than being from 54 'wagon'...
My educated guess, based on Opel’s model designations. All these cars share the same floorpan/chassis.

Model 51 - Ascona 2-door
Model 53 - Ascona 4-door
Model 54 - Ascona wagon
Model 57 - Manta

Putting Opel wagon rear springs into other model 50 Opels gains a little bit of ride height and slightly more load carrying capacity. It was and still is a fairly common practice.

I’m guessing this is what the Opel mechanic meant by ‘54 wagon’ springs.
 
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