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Lowering the left front

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Old Oct 13, 2021 | 12:05 PM
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Default Lowering the left front

The left front of my 72 is sitting too high. I would like to lower it about an inch. I'm thinking of cutting the coil spring but I don't know how much. They are the stock springs and the spring is sitting correctly in its perch. The right side is good. What say all-knowing CF members?



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Old Oct 13, 2021 | 12:19 PM
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Personally I wouldn't do that. On full droop the cut spring may move. Yours is a $25,000 sportscar, so applying a 4 cent 'fix' is wise???

Springs are a matched set, Springs have a statistical process control 'life-span'.

I would.... bite the bullet and get a set of PRECISION MADE lowering springs. Re-set the FINITE spring life back to zero.

52% of the attitude and 'stance' (hate that word!) is achieved in the BACK....so you have gone through the rear of the car first??

Good luck!
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Old Oct 13, 2021 | 12:23 PM
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Often this is a sign of an issue at the right rear corner. Check that first. If the right rear has sagging/broken stuff, the left front will raise.

Also, are you certain the left front shock is good and not frozen/binding when extended in the droop direction?

Fix the actual problem first. The left front sitting high is a symptom, and while Bubba might cut a spring or shorten a spring, that doesn't fix the real issue.
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Old Oct 13, 2021 | 01:00 PM
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Ok, a little more information: The frame was bent from a front collision before I got it. I had the frame straightened, he said the left front was bent up and in, but I'm not completely sure he did it correctly. Too late to fix it now! Anyways, the rear is pretty close as this was a complete frame-off rebuild.
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Old Oct 13, 2021 | 01:02 PM
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Here is a pic of the other side:



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Old Oct 13, 2021 | 01:14 PM
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They really need to be replaced in pairs......the Moog pieces are good parts but always sits too high, they need a coil cut out of the box.........
But you need to determine why it is that way and narrow it down to the spring being the only thing it can be.
Measure all four fenderwell to ground distance first.......record that.
Measure the front frame horns to ground.....if the horns are equally high on one side as the fenderwells....then it is the spring. If not....you have frame issues or body mount issues.

Jebby
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Old Oct 13, 2021 | 01:25 PM
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Originally Posted by cabman72
Here is a pic of the other side:


OK. I'm not seeing an issue at the right rear.

I wouldn't do anything until I made ride height measurements to the frame and to the body, and rolled it across the scales to get corner weights. Something isn't right. "Fixing" it without locating the actual problem and addressing that could make for some other issues.

Does it drive straight? Pull to one side? Does it feel better cornering in one direction than the other? From what I'm seeing, I'm thinking some handling/steering issues are also present here.
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Old Oct 13, 2021 | 03:08 PM
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When I was an alignment mechanic we also 'Weighted the car' with the DRIVER in it.

Springs are measured in inches of deflection per pound(s)....200 lbs driver on one side affects the ride height on that side.

Additionally. Anti sway bars (anti-roll bars) ARE SPRINGS. mal-adjusted units can affect the ride height as well as bent and deflected ones. This may be possible in that you admit after the fact that the car was in a major shunt.

I was going to say BENT FRAME in my prior missive. You should have that checked again.

Unkahal
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Old Oct 13, 2021 | 03:23 PM
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Before you go through the trouble of switching out parts, check to see if the springs in the front pockets have been indexed correctly. Do a search as the topic has been discussed on a number of occasions. Jerry
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Old Oct 13, 2021 | 04:06 PM
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Originally Posted by L-46man
When I was an alignment mechanic we also 'Weighted the car' with the DRIVER in it.

Springs are measured in inches of deflection per pound(s)....200 lbs driver on one side affects the ride height on that side.

Additionally. Anti sway bars (anti-roll bars) ARE SPRINGS. mal-adjusted units can affect the ride height as well as bent and deflected ones. This may be possible in that you admit after the fact that the car was in a major shunt.

I was going to say BENT FRAME in my prior missive. You should have that checked again.

Unkahal
Great thought….a bent sway bar sure will leave a car cockeyed…..

Jebby
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Old Oct 13, 2021 | 05:51 PM
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Originally Posted by cabman72
Ok, a little more information: The frame was bent from a front collision before I got it. I had the frame straightened, he said the left front was bent up and in, but I'm not completely sure he did it correctly. Too late to fix it now! Anyways, the rear is pretty close as this was a complete frame-off rebuild.
If that is indeed your problem (most likely it is), then correct it or live with it.
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Old Oct 13, 2021 | 10:30 PM
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I will take some measurements and report what I find. That may help with the diagnosis.
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Old Oct 14, 2021 | 10:47 AM
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Have a look at the first few minutes of this video. It may help in what to look for.
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