C4 rear end adjustment

[Bow tie downunder]

Is it possible to adjust the body height.I’m after 1/2 to 1 inch increase in height.

[55 Rescue Dog]

If you are running the composite transverse leaf spring like I do, you can simply use shorter bolt on the ends of the spring or add spacers between the nut and the bottom end of the spring. You can only raise it up so far before interference. If that's not enough, then you would need to find a stiffer spring. They had several different ones on the C4's but I have no idea which one would be best. The other thing is to shed a little weight in the rear. I don't have spare, and my battery is not in the trunk. I don't fill my 22-gallon tank either. My car is pretty stripped down at 3400lbs, but it rides and drives perfect with plenty of suspension travel. Which C4 conversion frame do you have? On the front you would need to maybe add spacers to the ends of the spring, which is more difficult. Beautiful car btw.
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[Bow tie downunder]

Thanks for your help .I have raised the front on the coilovers which has made the car sit level.I don’t want to upset the geometry .I thought of using 20 inch wheels instead of 18 .

[Bow tie downunder]

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Thanks for your help .I have raised the front on the coilovers which has made the car sit level.I don’t want to upset the geometry .I thought of using 20 inch wheels instead of 18 .

This is what I have

[WagonCrazy]

That's going to take a coil over adjustment (probably loosening the ring below the spring so that it relaxes the spring compression.
If you get it all the way loose (springs move around by hand), then you may need to go with the next longer spring length.

[Bow tie downunder]

Thanks for your input .L have adjusted the front it’s the rear I’m not sure of.

[BamaNomad]

Thanks for your input .L have adjusted the front it’s the rear I’m not sure of.

With the C4 transverse rear spring, rear height is easily adjustable (within limits).

To lower the rear of the car, remove the cotter pin and tighten the large nuts at the ends of the spring. Replace the cotter pins of course afterwards.

To raise the rear of the car, remove the cotter pin and loosen the large nuts at the ends of the spring. You have a lot of room to further raise the rear, and one can even go to a longer bolt as long as the spring is strong enough to further lift the car.

For my curiousity. Would you check the 2-letter code stamped into the spring and let me know which one you have?

[Bow tie downunder]

Thanks
The numbers on the spring are RHZ
1-6

[Bow tie downunder]

Thanks
I’m considering coilovers .Could you recommend a spring rate and shocks .

[chevynut]

I’m considering coilovers .Could you recommend a spring rate and shocks .

I'm not sure coilovers are the key to solving the root cause of your leaning problem. As I mentioned, the front coilovers are not adjusted the same so there's something going on with your chassis/suspension and I'd be inclined to find the root cause before trying to bandaid it. I'd measure the length of each front shock to see if they are the same length at ride height. Your left front shock is adjusted higher and if the shock is actually longer eye to eye than the right side, that would explain why your right rear is low.

To install coilovers you would have to have a shock bar in the rear. I don't like trying to mount the rear shocks vertically like in the C4 Corvettes and some conversions I've seen. The shocks need to be very short and there's just no room for them in the rear unless the top of the shock is inboard. I can't recommend shocks or spring rates without knowing the length between the mounting points at your desired ride height. What is your front coilover spring rate?