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  #11  
Old 09-26-2014, 12:38 PM
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Caribou Sandstorm Caribou Sandstorm is offline
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Before you throw down on Fox, check out a recent OJ edition, can't remember which one, they did a review of several shock systems with a Jeep Wrangler, probably not too dis similar to a built 40 in weight? Anyway, Fox kind of not the preferred set up in the review or in the 100 series world either.. I don't remember if they covered the res style shocks, as well.
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  #12  
Old 10-06-2014, 10:25 AM
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Got a little bit done on this over the weekend. I'm slow, so don't expect mind warping progress on this at any point.

Some specs:

Ride height with old Pro Comp springs and aftermarket shackles- 37.5" right front fender lip to floor. 36.5" right rear fender lip to floor.

Un-sprung weight- 280lbs passenger front with factory steel wheel & 33x9.5 BFG AT
224lbs driver front with same wheel/tire. Shocks were not factored in, nor was the shackle.

Spring weight - Procomp front spring weighed 37lbs
New OME heavy front spring weighs 53lbs

Length - Procomp front spring measures 41.75 end to end, and spring pin is 20.25" from center of fixed end to center of pin. Overall arch height unloaded is 7.5" top of eyes to seat area on pack.
OME front spring measures 41.25" end to end, and spring pin is 19.5" from center of fixed end to center of pin. Ovarall arch height unloaded and NEW is 6.5"

Observations: Looks like OME has discontinued the full military wrap and the flat section (visible on the rears tho) where the axle bolts, which is very disappointing, but maybe a bonus. Since the Procomp has better length and pin to frame length, it may now be possible to use the procomp main leaf and stack the ome under it to get the best of both worlds. It would have been nice to get the military wrap, but it appears CCOT or Alcan is the only way to get that now. If memory serves me correctly, the set of OME's I had back in 1999 had military wraps, a noticeable flat section, and the ends of the leaves were thinner. All of that is gone to save cash I'm guessing.

I had severe pulling to the right, and now I know why. My spring pin was BENT backwards on the right side which allowed the axle to look like it was centered, but wasn't. This coupled with the flattening on the left side, really made it veer hard.

The shackle angle pic shows the rear of the ProComp, which happens to be ideal. I would have a pic of the OME shackle angle, but those shackles won't work with the shorter OME springs. New ones being made or ordered...dunno yet.
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Last edited by OilHammer; 10-13-2014 at 11:09 AM.
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  #13  
Old 10-13-2014, 11:22 AM
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Front now measures 37" floor to fender with NO sagging yet. That's even with putting in a MAF shackle that's an 1" longer than what I had. Lame.

On to the rear:

227lbs unsprung weight RR
120lbs unsprung weight LR (I doubt this, but got it 4X!)
Rear procomp spring 41" long, 8.75" arch, and weighs 35lbs
Rear OME spring 41" long, 8.5" arch, and weighs 50lbs.
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1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 OME lift
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.
KD0PZL
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  #14  
Old 10-13-2014, 11:28 AM
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The big issue here is going to be the OME rear pin to frame mount distance. There's more than an inch change between the procomps and the OME, which is likely going to make me shorten my driveshaft, and move the exhaust pipe that routes inside the fender well. It worked beautifully with the PC, but I don't know if I can clear the 34's yet. That may very well be a deal breaker on these, and force me to come up with a way to move that pin back.

I also found out that my rear shocks were too short, so getting full droop out of the OME will only be achieved by dumping those. Was going to anyway, but good to know. Oddly, the fronts were spot on.

And a bit about customer service and competence. I ordered my OME kit from 4 wheel parts ONLY because of shipping. That was a mistake. They have sent me the wrong bushings 2x now, and I'm hoping the third they will finally get it right.
MAF sent the wrong shackles. They immediately called me, apologized, and are quick shipping the correct pair for the rear. Well played.
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1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 OME lift
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.
KD0PZL
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  #15  
Old 10-21-2014, 10:47 AM
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The quality of the ride is much better with the heavy OME, even with the pro comp shocks. The only bummer is that I lost ride height and some of the lean is already back after just a week. Doh! I'm afraid the only real way to combat 40 lean is with adjustable coilovers so you can change the ride height on one side, but not change the spring rate.
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1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 OME lift
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.
KD0PZL

Last edited by OilHammer; 10-21-2014 at 02:12 PM.
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  #16  
Old 11-16-2014, 09:53 PM
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First heavy trail ride report: I like it. No regrets on the heavies. I'm bummed that the tire rubs the exhaust up in the front of the fender, but it appears only my LTB's do that and not the street tires. Old shocks are actually ok, so dunno that I will go about changing those too soon.
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1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 OME lift
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.
KD0PZL
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  #17  
Old 11-17-2014, 09:32 AM
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Since Ige mentioned it above, anybody running Skyjackers any more?
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  #18  
Old 11-14-2017, 10:39 PM
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Update: Caught my passenger front shackle just right coming over an obstacle this weekend. Bent the main leaf 90d up right at the frame mount. I think the military wrap would have prevented this, but maybe not. I'm also pretty sure those anti-inversion shackles saved my bacon by limiting the bend to the spring and keeping it from folding all the way under....or collapsing the drive shaft and killing the transfer case. I was 12hrs from Denver, so good thing this wasn't worse!
Boo on ARB for killing the military wrap.

Since I need to pull the entire assembly all over again, I'm thinking I may go ahead and try swapping the main leaf from the pro-comps back in. I'll gain a little bit of my wheelbase back and my shackle angle on the front should improve.
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1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 OME lift
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.
KD0PZL
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  #19  
Old 11-15-2017, 12:44 AM
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Rzeppa Rzeppa is offline
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Wow, talk about a thread bump!

Only reason I am posting is that suspension work is fresh in my mind, finally got around to installing the OMEs on the front of my 60, two years after putting the rears on. It's unclear whether the improved handing is from the springs or just bushings that are not metal-on-metal worn out. All the OMEs I have installed, both the 60 and my '76 40 have a military wrap.

I have a lot of muscles I forgot I had after doing that work...

On-topic, 40s...

In 2004 Wayne Smith, the Canuck who sold me my HZJ75 and then traded for my FJ45, helped me lift my '71 40 enough to fit 33s for our new Cruise Moab rule that all the trails I used to do on 31s now had to have 33s.

So his lift is, you get these Rancho add-a-leaves that are made for a YJ application. Take out the bottom two leaves of the stock FJ40 spring pack and replace with the add-a-leaves. Presto bingo, 2.5 inch lift, still soft and flexy and dirt cheap (the Rancho add-a-leaves are like, $80 for a pair and include center pins).

13 years later, no sag, no lean. Gotta say I'm really happy. Now if those darn OME shocks hadn't worn out! I'm thinking Bilstiens maybe? But yeah, econo-lift and very nice ride, unexpected longevity. Just checked my log, about 25k miles in those 13 years.
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  #20  
Old 11-15-2017, 09:17 AM
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My previous OME springs had the flat section for the axles and the military wrap, but they weren't called "Dakar" either. I think they were a much better spring than the Dakar line.
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1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 OME lift
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.
KD0PZL
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