New leafs too high, how much will they settle?

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@cawcislo

Mancini Racing Leaf Spring Front Hanger & Hardware kits
2 holes. One standard location, the other 1" drop.
mre-leaf-spring-front-hanger-kit-3.png
 
Well I put 3 or 4 bundles of shingles and 160 lbs of steel plates into the trunk. So I’d say that’s gotta be 300 or 350 lbs of weight. Car is still a bit higher then when I started. The front eye bolt is loose and the rear hanger moves freely, and I loosed the ubolts, so nothing is bound up. I bounced the rear a bit, but it’s definitely stiffer then the old slant six worn out springs. I’ll leave the weight and once the snow melts I’ll drive it around for a while and see how much these springs settle and go from there.
 
cawcislo said:
They are Mopar performance made in Mexico springs. Sounds like they’re gonna settle a lot, which is good. I’ll,loosen everything up just to be sure and bounce it around and see if that makes any difference. I’ll report back tomorrow
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DO you remember the part number? I'm trying to lift my dart up a bit. Do you have any pictures?
 
HankRearden said:
DO you remember the part number? I'm trying to lift my dart up a bit. Do you have any pictures?
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P3412003 is the part number. What kind of springs do you have in your dart now. And when you say you want to lift it up a bit how much is a bit (1 inch, two inches)?
 
PICTURES!!!
Want to see where the car sits now

BY the way if you liked the car with the sagging slant six springs, why did you change them?
 
Got to be the Super Stock replacement leaf springs. Sit way too high and way too stiff.

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Took the lower stock short leaf spring out of the '67 Dart's original stack and added the short lower Big Block leaf (about 12" long x 3/8" thick).

That put some arch back in the stock leaf stack and did not lose the nice ride in the process.

Screenshot_20220421-002752_Gallery.jpg


Here is how it sits now:

Screenshot_20220421-003124_Gallery.jpg
 
cawcislo said:
P3412003 is the part number. What kind of springs do you have in your dart now. And when you say you want to lift it up a bit how much is a bit (1 inch, two inches)?
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I have no idea. They aren't stock. They don't look all that old and have fewer leaves than any A body I ever worked on. They came with the car. The guy I bought it from thought they were some kind of lowering spring. The top edge of the wheel is up above the quarter lip. This is the lowest dart I have ever owned. Transmission crossmember is only a couple inches off of the ground.
 
George Jets said:
Got to be the Super Stock replacement leaf springs. Sit way too high and way too stiff.

_________________

Took the lower stock short leaf spring out of the '67 Dart's original stack and added the short lower Big Block leaf (about 12" long x 3/8" thick).

That put some arch back in the stock leaf stack and did not lose the nice ride in the process.

View attachment 1715911367

Here is how it sits now:

View attachment 1715911368
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thats exactly what Im going for.
 
I just installed P4120864 and 63. Supposed to be for a 2800lb car. Now my car is jacked up in the rear. All fasteners were tightened with the axle up. It’s pretty bouncy right now. I’m going to take the load off the front suspension and raise the front. Dang it.

image.jpg
 
jpl572103 said:
I just installed P4120864 and 63. Supposed to be for a 2800lb car. Now my car is jacked up in the rear. All fasteners were tightened with the axle up. It’s pretty bouncy right now. I’m going to take the load off the front suspension and raise the front. Dang it.

View attachment 1716296668
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those super stock springs? if so thats why i advise against those damn things everytime a spring thread comes up. too many guys stuck in the 70's and 80's and they were one of few options.
 
jpl572103 said:
I just installed P4120864 and 63. Supposed to be for a 2800lb car. Now my car is jacked up in the rear. All fasteners were tightened with the axle up. It’s pretty bouncy right now. I’m going to take the load off the front suspension and raise the front. Dang it.

View attachment 1716296668
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Just out of curiosity did you use a torque wrench on the ubolts or just "Tighten" them?
 
Dartswinger70 said:
Fat is where its at or so they say...:)
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Put them both in the back seat on opposite sides. I had Dave Barnard and Geno Schaumburg on the same side in a 68 Coronet R/T I had years ago one in front and one in back and it looked like I had a broken spring on the passenger side. I had to ask Geno to sit behind me instead of behind Dave to even out the load...LOL Two incredibly stout gentlemen!
 
Torqued to 45ft. Shackles 35ft. Everything torqued. Even the wheels. I turned up the torsion bar tension. It’s livable. Thanks.
 
jpl572103 said:
Torqued to 45ft. Shackles 35ft. Everything torqued. Even the wheels. I turned up the torsion bar tension. It’s livable. Thanks.
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ah k.. just makin sure.. i was shocked how bad overtightening mine cause the issue you are having
 
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