Dr Diff Offest Kit With Oval Track Springs
The AFCO’s are similar to the MP’s with the last 4” or so unsupported by the second spring. I haven’t had any issues with the AFCO’s though. They’re pretty flat but they don’t reverse at all.
I think those MP’s are just made out of crap steel, or maybe not heat treated properly.
Well, swapped my 45+ year old springs back into the car.
Just to refresh, I bought the Circle Track springs last year about this time, installed them last September or October, drove the car to my Dad's about 40-50 miles and it has sat ever since. I haven't even dropped the clutch on the car yet.
The new leaf springs are documented to have a front segment 1/2" longer than stock, but based on the first picture with the the "new" leaf springs and the last with the old ones back in, the difference in axle location is about an 1". I did measure the front segment and agree with the published data, so I am guessing that the extra 1/2" is due to the rear axle rolling backwards due to the S curve in the front segment.
MP springs:
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OEM spring:
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I am convinced that the springs deformed as soon as I loaded them. I am basing this on the trouble I had getting the bottom eye of the shock installed on the pin. I thought this was due to the axle moving back in the chassis, but the more I think back on it, I am sure that it was because the spring had deformed putting a significant misalignment between on top and bottom pins. In addition, I don't believe the axle has changed location in the wheel well since I installed the springs as I noticed how far back the axle was immediately after setting the car on the ground.
Here's some comparison pictures of the 45+ year old springs that were under the car and the "new" MP springs. I did clean the OEM springs up and put some paint on them just because I didn't want to put rusty springs back under the car. But they are just OEM 6 leaf springs that held the car up fine.
Even unloaded you can you see the S curve in the front segment. In fact, it really doesn't look like the springs have any "spring" to them based on a comparison of the installed and loose pictures.
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@72bluNblu, I would be curious to hear how the front segment of your AFCO springs are built. Do they have a leaf that extends all the way to the front eye like my OEM springs? Or do they leave the main leaf unsupported for 4" or so like these MP springs?
Either way, I see a real issue with materials based on the fact that they spring didn't even try to return to it's previous shape when unloaded.
Pure junk.
The AFCO’s are similar to the MP’s with the last 4” or so unsupported by the second spring. I haven’t had any issues with the AFCO’s though. They’re pretty flat but they don’t reverse at all.
I think those MP’s are just made out of crap steel, or maybe not heat treated properly.
