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Discussion Starter #1
I am half way into my RE 1 1/2" soa leaf spring swap and don't like them. I have RE on the rear axle and am thinking about selling them and getting on the Alcan bandwagon. The reason I went to RE is that they are made for soa with the main leaf going over the top of the eyes, rather than the bottom. This extra arch keeps the leaves from getting into as much negative arch, and I use a lot of uptravel. However, the REs ride like a lumber truck and I had a way better ride with my junkyard spring packs. Only I kept breaking them and thus the swap.

The question: If you use Alcan on soa, do you have a lot of uptravel?
 

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I am half way into my RE 1 1/2" soa leaf spring swap and don't like them. I have RE on the rear axle and am thinking about selling them and getting on the Alcan bandwagon. The reason I went to RE is that they are made for soa with the main leaf going over the top of the eyes, rather than the bottom. This extra arch keeps the leaves from getting into as much negative arch, and I use a lot of uptravel. However, the REs ride like a lumber truck and I had a way better ride with my junkyard spring packs. Only I kept breaking them and thus the swap.

The question: If you use Alcan on soa, do you have a lot of uptravel?
I'm guessing at this point you don't know how to set up a suspension. So assuming that the answer is going to be no and yes. How much uptravel you have is going to be based on, how much flex the springs has, how much lift the spring has, vehicle weight, bumpstop setup, fender clearance and tire size. On average id say a flat leaf spring probably has 4 Inches plus or minus or uptravel. Slighty lifted ones may have a bit more uptravel but less down travel.
 

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Discussion Starter #3
I'm guessing at this point you don't know how to set up a suspension. So assuming that the answer is going to be no and yes. How much uptravel you have is going to be based on, how much flex the springs has, how much lift the spring has, vehicle weight, bumpstop setup, fender clearance and tire size. On average id say a flat leaf spring probably has 4 Inches plus or minus or uptravel. Slighty lifted ones may have a bit more uptravel but less down travel.

Thanks for the reply. My suspension is set up ok, I like the axle movement. I'm not doing the low center of gravity thing where you may have 2" up and 12" down travel. My suspension is equal both ways. My buddy that I have run with for several years has Alcan springs on his cj7 and they perform well, and have never broken. We jeep pretty hard. However, his jeep was set up so that it doesn't have a lot of up travel. I am wanting to know I somebody out there has a lot of up travel with leaf springs, and has good luck with their springs.
 

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Thanks for the reply. My suspension is set up ok, I like the axle movement. I'm not doing the low center of gravity thing where you may have 2" up and 12" down travel. My suspension is equal both ways. My buddy that I have run with for several years has Alcan springs on his cj7 and they perform well, and have never broken. We jeep pretty hard. However, his jeep was set up so that it doesn't have a lot of up travel. I am wanting to know I somebody out there has a lot of up travel with leaf springs, and has good luck with their springs.
Ummm either you are not asking your question right for people to understand or you should go back an re-read my post again, specifically the part about the amount of uptravel you have being based on your vehicle setup. Alcan is the cream of the crop in leaf springs, they don't make one generic leaf spring, for all vehicles. They custom make the springs based on your vehicle and your requirements. The only way its gonna have decent up travel is if you make it have decent up travel. And most people set up their rigs with more down travel for a reason, why on earth you would want to do it backwards, especially when you are bascially redoing your entire suspension is beyond me.:confused: I would do more research, and probably go talk to your buddy and see what he says, he sounds like he has a decent idea of what hes doing.
 

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Discussion Starter #5
Ummm either you are not asking your question right for people to understand or you should go back an re-read my post again, specifically the part about the amount of uptravel you have being based on your vehicle setup. Alcan is the cream of the crop in leaf springs, they don't make one generic leaf spring, for all vehicles. They custom make the springs based on your vehicle and your requirements. The only way its gonna have decent up travel is if you make it have decent up travel. And most people set up their rigs with more down travel for a reason, why on earth you would want to do it backwards, especially when you are bascially redoing your entire suspension is beyond me.:confused: I would do more research, and probably go talk to your buddy and see what he says, he sounds like he has a decent idea of what hes doing.
How about this: will Alcan springs handle 5" up travel repeatedly? I know they will handle the down travel, they are excellent springs.
 

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I'm not too sure what springs no matter what the quality could handle 5 inches of negative arch travel... if thats what you mean it all depends on how you have alcan arch your springs for your desired height and the weight of yoru vehicle. if they are three or 4 inch lift springs then yeah i supposed you could take them into the negative 1 to 2 inches or so and they would do just fine with it, but i dont really recomend bending your leaves into negative arch 5 inches deep... hope the input helps
 

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How about this: will Alcan springs handle 5" up travel repeatedly? I know they will handle the down travel, they are excellent springs.
Probably not, no leaf spring will. You could add in lift to compensate, but this would make the spring flex less and of coarse make your vehicle and COG higher, both bad things. Why would you want so much up travel? Unless you are doing a baja racer or something similar to that. If u are buying Alcans you have the opportunity to really dial your suspension in, keep the COG low and make use of the down travel. Other then wanting to look cool with a rediculous high lifted jeep i'm not seeing the benefits of so much uptravel for a basic trail rig/crawler. I believe you when you say you wheel hard, thats good and all, but alot of people on this board wheel just as hard if not harder then you do, and the suspension designs are still dialed in pretty much the same something similar to 2/3 down travel 1/3 uptravel or even 3/4 down travel 1/4 uptravel. Good Luck with whatever you decide.
 

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Discussion Starter #8
I'm not too sure what springs no matter what the quality could handle 5 inches of negative arch travel... if thats what you mean it all depends on how you have alcan arch your springs for your desired height and the weight of yoru vehicle. if they are three or 4 inch lift springs then yeah i supposed you could take them into the negative 1 to 2 inches or so and they would do just fine with it, but i dont really recomend bending your leaves into negative arch 5 inches deep... hope the input helps
This is what I'm talking about. This is pretty much the answer except for dialing in the numbers. If an alcan spring has about 2" arch, then you would have 3" negative arch in 5" up travel at the spring plate. My junkyard springs could do it but they broke leaves every now and then. From what I hear, almost everyone's does. That's the benifit of RE soa spring packs, the leaves arch over the top of the eyes giving an additional 2" of arch before negative arch.

As for the comment about springs not doing negative arch, I'm sure we've all seen the Ford pickups with the front leaf springs that are factory built with tons of negative arch.

Anyway, this is all helpful and thanks for the replies. This helps me think things through as I need to before investing several more hundred dollars on springs.

I suppose if I wanted a lots of down travel, but not much up travel I would just throw on some 42" tires and be done with it.
 

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It also has to do with the length of shackle you are running. I have 3" Alcans in a SUA setup and I am pretty sure that I can get 5" of uptravel and my springs are basically flat when they touch the bumpstop and that is with 5/8" MORE lift shackles
 
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