Ford Muscle Cars Tech Forum banner

1 - 13 of 13 Posts

·
Registered
Joined
·
407 Posts
Discussion Starter #1
(Picture below) I removed one leaf spring, except for the main eye leaf. Removed from the rubber housing, and mount. The spring came off okay, and they were all together with no pressure on the center bolt. After they sat a while the one leaf, on it's own straitened out. Am I gone crazy or is this an actual real happening when they are removed?.

Spring02.jpg


(Picture Below) When depressed manually, the ends are not against the one on top, like they were on the car. They DID relax a little, but not this much.

Spring01.jpg

(Picture Below)The leafs in this picture. The top one is the 3rd down from the eye leaf. The one under it, is the proposed replacement. As I understand, the most top leaf is the one that takes the most heat, and that one should be the one replaced, however, cost and availability is in play here. So, we go the next sized leaf to replace. The 3rd leaf.

The new leaf will be trimed and cut to equal the original leaf... The arch is just about the same, except for the very ends....

My question: Am I on the right track?, and what about "Spring slap"?. if I am on the right track, then what causes spring slap?... Mind you, I can not go with new springs right now. I am looking to have the rear end a little higher than the front. The back on the car is not that low, but low enough to bother me while driving. It drives good, doesn't bounce, and feels like the springs are in good condition...

Spring03.jpg

Before I put them together, (with the new leaf) and re-install. They will be cleaned up and painted.... The original rubber in between the leafs, and the base spring houseing will be put back on also, cleaned up and painted. The condition of the rubber is in very good condition. Lot's of rubbery rubber. Not severely cracked, and breaking. All came apart quite well, without any bolt problems at all.

The last question: The very last one, the smallest. Can I cut another leaf, 1/2 the size of the last one, and add it in for additional height?. The bottom springs are mainly for height right?. As I understand it.

If all is well, I will be starting the leaf work.... Input would be most appreciated..... Thank you.
 

·
Registered
Joined
·
10,305 Posts
An alternative is to have your good rear leafs simply re-arched. Some frame shops do this at a very reasonable price. Just tell them how much higher you want the car to sit, and they will re-arch them to sit just like that. It also has the advantage of not stiffening the spring pack or making a harsher ride.

David
 

·
Registered
Joined
·
407 Posts
Discussion Starter #4
I wish I could but new springs.... The money is not in the budget. Besides that, the additional leaves I have were given to me.... New springs is not in the budget...

So, that being said, If anyone can let me know if I am on track or not with this idea....
 

·
Registered
Joined
·
407 Posts
Discussion Starter #5
An alternative is to have your good rear leafs simply re-arched. Some frame shops do this at a very reasonable price. Just tell them how much higher you want the car to sit, and they will re-arch them to sit just like that. It also has the advantage of not stiffening the spring pack or making a harsher ride.

David
I'll check into that, but there are not much around here in spring shops. They are all two hours away.... But, I still would like to know if my switching leaf idea will work.... It's got to do better than if I didn't do anything to them.
 

·
Registered
Joined
·
10,305 Posts
Unless your replacement leaf is higher rate or greater arch, it will not change the height. The springs are usually banded at the ends, but spring slap comes from hard accel or decel. Axel wrap under acceleration causes the rear of the springs to separate, and decel does the front. You can buy bolt-on spring clamps to stiffen the pack on axle wrap, but that wont change height to speak of. Blocks are another cheap option if you aren't using a ton of power.

It's not spring shops, but frame shops that do spring re-arching. Some brake shops do it too. I've actually found more smaller towns to have them than larger towns. There's usually one big collision repair shop around, and they would be my first call. If they don't, they should know who does.

David
 

·
Registered
Joined
·
407 Posts
Discussion Starter #7
Unless your replacement leaf is higher rate or greater arch, it will not change the height. The springs are usually banded at the ends, but spring slap comes from hard accel or decel. Axel wrap under acceleration causes the rear of the springs to separate, and decel does the front. You can buy bolt-on spring clamps to stiffen the pack on axle wrap, but that wont change height to speak of. Blocks are another cheap option if you aren't using a ton of power.

It's not spring shops, but frame shops that do spring re-arching. Some brake shops do it too. I've actually found more smaller towns to have them than larger towns. There's usually one big collision repair shop around, and they would be my first call. If they don't, they should know who does.

David
Okay, so, I don't have slap. It's a 6 and the axle is in good shape.... Diden't slap while I was driving it last year before I started the work.

Thought about blocks, but, I don't think there is enough of room the way the channel goes over the pack at the axle. I know someone whom chose to leave off the 'channel" and use the U bolts and the bottom mounting piece. There car was a falcon. And it drives good... he diden't add or subtract any leafs though.

The good acquired leafs are a little more arch then what appears to be on the originals. They are also a we bit thicker, almost the same thickness, but not. There are two in the good pack that has a considerable higher arch then the one leaf proposed to replace one leaf. (talking off the car)

Better to try to keep the arch? or, use the grater leaf?. I am not looking for high, high end, I just want it to be a little higher than the front. The ride, can be a we bit stiffer, but not like a truck.

So, what should I be looking for when figuring out what leaf to replace?, and the new leaf should look like before it goes into the pack?.

What is the height and ride difference between the arches, Is it calculated by "arch inches"?. or something like that to determine the "ride" or at least, to give me a better idea on what to look for for this mod....

Thanks.
 

·
Registered
Joined
·
809 Posts
Unless your replacement leaf is higher rate or greater arch, it will not change the height. The springs are usually banded at the ends, but spring slap comes from hard accel or decel. Axel wrap under acceleration causes the rear of the springs to separate, and decel does the front. You can buy bolt-on spring clamps to stiffen the pack on axle wrap, but that wont change height to speak of. Blocks are another cheap option if you aren't using a ton of power.

David
Wouldn't adding blocks lower the car? Axle is on top of the spring?

If axle is on top of the spring you could swap it. Get a set of perches, mount them on top of axle and mount axle under springs. But this will raise the car a good bit. Been along time but thinking around five inches, maybe more, but not sure, been years since I did it.
Measure from bottom of spring pack to center of axle and measure from center of axle to flat of new perch and add together for height distance if I recall correctly.

13inchtires I'll see if my buddy can provide any info, he plays with leaf springs a lot. Hopefully see him today.

Lou
 

·
Registered
Joined
·
407 Posts
Discussion Starter #9
Wouldn't adding blocks lower the car? Axle is on top of the spring?

If axle is on top of the spring you could swap it. Get a set of perches, mount them on top of axle and mount axle under springs. But this will raise the car a good bit. Been along time but thinking around five inches, maybe more, but not sure, been years since I did it.
Measure from bottom of spring pack to center of axle and measure from center of axle to flat of new perch and add together for height distance if I recall correctly.

13inchtires I'll see if my buddy can provide any info, he plays with leaf springs a lot. Hopefully see him today.

Lou
Then I would have to change the shocks and set up.... Don't want to do that..... Please check and let us know.... If changing a leaf or two will help, then, that will be good... Thanks
 

·
Registered
Joined
·
809 Posts
Then I would have to change the shocks and set up.... Don't want to do that..... Please check and let us know.... If changing a leaf or two will help, then, that will be good... Thanks
Ok talked to buddy yesterday, he said the smaller leafs will not help much with height, that the longer ones work better to raise the car.
What he does is adds a leaf to the pack. If you have two sets of springs. Start with the best main. Then take the other mains and cut the eyes off and use them under your best mains. He said to cut the springs so they are about 1.5 - 2 inch shorter at each end than the spring above it.

Said it should raise the car around inch and a half to two inch.

Hope it helps

Lou
 

·
Registered
Joined
·
407 Posts
Discussion Starter #11
Ok talked to buddy yesterday, he said the smaller leafs will not help much with height, that the longer ones work better to raise the car.
What he does is adds a leaf to the pack. If you have two sets of springs. Start with the best main. Then take the other mains and cut the eyes off and use them under your best mains. He said to cut the springs so they are about 1.5 - 2 inch shorter at each end than the spring above it.

Said it should raise the car around inch and a half to two inch.

Hope it helps

Lou
Okay... Nice, however, I don't have the leaf with the eye. I have all the others from the other springs pack... So, I suppose, the next one down in line?. Or get another set of spring packs. I may be able to, don't know..

The other thing is. The original pack has a cover over it, like a channel, with the bottom plate, at the bottom of the spring. The shocks connect to it too. If I use this plate, there may not be enough of room to add another, unless I remove the rubber booting inside the channel.

So, at that point, fit them in as best as I can?. Omit the cover?. Omit the rubber?. There is someone I know who has the same rear suspension, on a older car than mine. He diden't add leafs, but omitted the channel and the rubber channel inserts. He has no problem with sway, or feels any difference.

Ask him those question if you would be so kind.... Thanks





Thanks...
 

·
Registered
Joined
·
809 Posts
Okay... Nice, however, I don't have the leaf with the eye. I have all the others from the other springs pack... So, I suppose, the next one down in line?. Or get another set of spring packs. I may be able to, don't know..

The other thing is. The original pack has a cover over it, like a channel, with the bottom plate, at the bottom of the spring. The shocks connect to it too. If I use this plate, there may not be enough of room to add another, unless I remove the rubber booting inside the channel.

So, at that point, fit them in as best as I can?. Omit the cover?. Omit the rubber?. There is someone I know who has the same rear suspension, on a older car than mine. He diden't add leafs, but omitted the channel and the rubber channel inserts. He has no problem with sway, or feels any difference.

Ask him those question if you would be so kind.... Thanks

Thanks...
ok, if you don't have extra mains he said replace a shorter one with a longer one. For example if both packs are the same replace your 3rd spring down with the second spring down from extra pack. Or your fourth spring down with the third spring down from extra pack. Or even do both if you need to for the height you want.
Not sure on the channel but felt if you have the u bolts and bottom plate you could eliminate the channel. Not real sure on what you mean by channel? Something like what the Versailes had on rear springs? Plate on bottom of spring and a plate that bends around the top of springs and meets the bottom plate?
Maybe a picture or two on how the plate/channel look on the spring?
Does the shock connect to bottom plate or the channel?

Hope it helps

Lou
 

·
Premium Member
Joined
·
443 Posts
I ordered a set of secondary main leafs from McVeigh's Truck Springs in Mio, MI for $40. Gave me an additional 2" lift. They also supplied me with a new eyed main leaf to replace one of the originals that was half rusted through. Charged me $40 for that. Give them a call at: 989-862-3682. They also have the 2" wide rebound clamps and rubbing pads.
 
1 - 13 of 13 Posts
Top