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Old 04-29-2012, 07:39 PM   #1 (permalink)
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Uncommon leaf springs choices for SAS

Figured I would throw out some of my experiences with the few springs I have dealt with. Everyone knows about the Chevy 52s and 47s but hopefully we can compile a list of uncommon springs that have worked well with a particular setup.

56" Superduty "V" codes - 3" wide, rough travel was 1.5" down 1.25" up. They didn't ride bad on the road and are military wrapped. If your building a truck to tow and not wheel, these might work for you.

1980-97 56" F250 rear springs (4/1) - removed overload and bottom leaf, 3" wide, no mil wrap, works very well under my 97 Z71, 6" down, 5" up, ride well on the road.

V-codes vs Rear pack - Ride height is 1" lower with rears installed

Vcode travel not worth documenting. They are nearly flat at ride height.

Rear springs full droop 6"

Full compression 5"


Thats my short list and hopefully it may help someone. Ad on if you have any experiences with less common springs on Chevy SASs.
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Old 04-29-2012, 08:15 PM   #2 (permalink)
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Nice!

Any pics of the whole truck so I can see the ride height?
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Old 04-29-2012, 08:40 PM   #3 (permalink)
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First picture is with V codes and a zero rate 1" forward. Second is the rear pack with zero rate moving it back 1" and is still .5" further forward than the Vs and dropped the front .75". I'll get a fender height tomorrow.

Ride height shackle angle is 62* right now. I'm going to tune it hopefully this week. The springs go negative at about 4" so I'm hoping 45* might help that out.


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Old 04-30-2012, 02:09 PM   #4 (permalink)
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I like it. That's how an SAS should look like. Any reason to use ford springs instead of 52's? Just to be different?
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Old 04-30-2012, 02:23 PM   #5 (permalink)
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I'm currently looking into using MJ comanche leafs from Rusty's on the front of my SAS'd 92.

They are 57" but they measure 26" front eye to center pin, which is the same as my 52's. They look to be a quality product. They lift a MJ 4" and they are SUA. I want to see how those would work on my truck. I have DIY4X front spring hangers so I have 4 holes of adjustability. I would just mount the front in whatever hole gives me the best shackle angle.

They are $270 a pair which is why I am looking into them. Only problem would be my driveshaft that's being made right now....

EDIT: It just hit me that my shackle brackets are adjustable and I have them in the most forward set of holes now, looks like driveshaft length won't be what stops me

http://www.rustysoffroad.com/jeep-su...rear-pair.html

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Old 04-30-2012, 03:38 PM   #6 (permalink)
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Quote:
Originally Posted by The_Punisher View Post
I'm currently looking into using MJ comanche leafs from Rusty's on the front of my SAS'd 92.

They are 57" but they measure 26" front eye to center pin, which is the same as my 52's. They look to be a quality product. They lift a MJ 4" and they are SUA. I want to see how those would work on my truck. I have DIY4X front spring hangers so I have 4 holes of adjustability. I would just mount the front in whatever hole gives me the best shackle angle.

They are $270 a pair which is why I am looking into them. Only problem would be my driveshaft that's being made right now....

EDIT: It just hit me that my shackle brackets are adjustable and I have them in the most forward set of holes now, looks like driveshaft length won't be what stops me

http://www.rustysoffroad.com/jeep-su...rear-pair.html
I have no experience with them, but I have to say, I think you are barking up the wrong tree.

Taking a spring from the rear of a Comanche, and putting it up front on an SAS..... I just don't see it having any arch at all with weight sitting on it. I could be wrong, but you should definately try to find out what the spring rate is before plopping any money down. Of course, you could always add leaves to get what you want, but you can adjust what you already have, without spending $$ on new springs.

Simply put, the rate and free arch to give a Comanche 4" lift in the rear, isn't anywhere close to what is needed to give a SAS fullsize the same amount of lift in the front.
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Old 04-30-2012, 04:11 PM   #7 (permalink)
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Quote:
Originally Posted by Killroy1942 View Post
I like it. That's how an SAS should look like. Any reason to use ford springs instead of 52's? Just to be different?
I bought a 89 F250 donor truck for the axles and it already had the Vcode fronts so I tried those out. Didnt like them and already had my hangers setup for 3" wide springs so before I did anything drastic I figured Id give the rear springs a shot and thankfully they work perfect for my setup. I wanted to run 52s minimum but the 56s are that much better plus its different never seen anyone running 56" F250 rears upfront.
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Old 05-01-2012, 12:04 PM   #8 (permalink)
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Nice truck, do you have build-thread?
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Old 05-01-2012, 12:11 PM   #9 (permalink)
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No build thread. Its just your standard SAS chevy but I can make one or post up some build pictures.
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Old 05-05-2012, 01:44 PM   #10 (permalink)
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I would like to see how and where your rear shackle is mounted.. also what length shocks you running? 12s? Im picking up my axle for sas monday and plan on grabbing some f250 spring while Im at it

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Old 05-05-2012, 09:58 PM   #11 (permalink)
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MAKE SURE THEY ARE REAR SPRINGS!!!!! Do not get front springs they have zero travel.


I will post some up to date pictures on Thursday. The shocks are 14" 5150s. I got an entire 89 f250 with a sky shackle reversal for a donor and used most of its parts. It's a very simple swap. Definitely plan for a track bar if you are driving it on the highway. The body sway is ridiculous without a track bar. A sway bar would solve some of the issues but turning at a stand still w/o a track bar moves my truck atleast 2" side to side.

Pictures are with the v codes and before everything was setup how it is today.


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Old 05-08-2012, 10:09 AM   #12 (permalink)
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thanks! that was exactly what I was looking for
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Old 05-08-2012, 05:43 PM   #13 (permalink)
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Has anyone tried springs from Fabworx? They make SAS kits for 88-98 OBS chevys.

http://www.fabworxoffroad.com/52-fro...rsion-springs/

overall length of those is actually 58" because they add 3" to each side of the center pin. They seem like nice leaf springs but $$$. I think I remember seeing somewhere that Atlas or Alcan springs makes them.

anyways they look great, bit I figure at that price there's not a lot of guys running them. I can't even seem to find any reviews at all. I want a nice set of leafs up front like that, I have deavers in the rear.
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Old 05-09-2012, 10:00 AM   #14 (permalink)
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I'm really happy with my 56" Ford rears. Definitely worth givin them a shot if you want a longer spring and can find them at the junk yard.


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Old 05-18-2012, 11:24 PM   #15 (permalink)
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Very interesting post, and very helpful no doubt to a lot of people. I used some toyota 4inch lift procomp springs on my SAS and they worked awesome, they were 55 bucks a peice new, with poly bushings. They are mounted on full widths with a 350 small block and sm465 riding on top of them. They still hold the weight great and have amazing flex, if you are looking for some good flex on a budget this is the way to go. I know 4wheelparts carries them. Good luck people
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Old 05-22-2012, 11:35 AM   #16 (permalink)
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Anymore people out there? Hoping to compile a thread with helpful info on spring choices other than 52s.


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Old 05-22-2012, 11:37 AM   #17 (permalink)
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What's the length of the yota springs?


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Old 05-22-2012, 03:01 PM   #18 (permalink)
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If I remember right that are ~46" long with a centered pin.
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Old 05-22-2012, 03:05 PM   #19 (permalink)
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Daniel might as well post some info on your front axle that you re-tubed yours is a pretty unique swap as well.


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Old 05-22-2012, 06:43 PM   #20 (permalink)
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There is a guy on fsc with rear 63's up front
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Old 05-22-2012, 07:05 PM   #21 (permalink)
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What is the yr application for the yotas?
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Old 05-22-2012, 07:09 PM   #22 (permalink)
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This is what I found for the Yota springs.Looks like the pin is offset also.
http://www.4wheelparts.com/Lift-Kits...=4+Wheel+Drive
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Old 01-08-2013, 08:47 PM   #23 (permalink)
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Hi iridektm, how are the ford leafsprings holding up? I would like to do the same thing on my Gmc, but I want to get as much information as possible before I start with anthing. Do you think the 56" chevy rear springs just as soft and can you post some new current pictures?

Oh, one other thing what are your fender height numbers on all corners. Thanks!
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Old 01-09-2013, 07:45 AM   #24 (permalink)
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I've got a pretty random setup. Trail Mart 5" HD's (toyota). I ran 4" skyjacker crap from a blazer (front app) early on, then went to these. The guy at TG said they were built for a toyota with a small block and a winch. I figured my junk was stripped down enough to get decent life out of em. And the price was right. To be honest, I'm only counting on them to get me by till I can afford some link parts and C/O's. In the mean time I'm torturing them with 7" up/down travel. They ride good and hold up the truck fine so far.
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Old 01-09-2013, 08:11 AM   #25 (permalink)
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My mut springs are a full f150 pack with a couple 3" lift toy leafs thrown in it. They are soft, flex really well and ride really nice on the road. Only down fall is you almost have to put a limit strap on with them. They droop out so far the pinion angle is totally fawked with out the strap in there.
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