Experimental Lift Combo...What say you?

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Skillet said:
Dan,

How do you like the ride on the 864?

I considered them but thought the ride of the comps would be a little softer and still give me a good height.

As I said, this is experimental so we will see after my Death Valley trip.

Curious, how do the 864's give you that much height with the j's in the front and a spacer? If I would have put just the j's on my rig up front with the 863's in the back and no load, I think I would have been dumpy in the back. The 863's are supposed to be the same height as the 864's. At least according to the chart.
Click to expand...

Anunloaded 863 is about the same as an 864. Add weight and the 863 drops twice as fast as the 864. When I went from the 863 to the 864 I had to put this much weight in the truck to drop the height to where it was with the 863's...........
ballast.webp
 
That is 5,640 rounds of .30 caliber M2 ball ammunition, about 430 pounds worth.
 
cruiserdan said:
Anunloaded 863 is about the same as an 864. Add weight and the 863 drops twice as fast as the 864. When I went from the 863 to the 864 I had to put this much weight in the truck to drop the height to where it was with the 863's...........
Click to expand...

Thanks Dan.

Just ed-ju-ma-cating myself on the whole spring thing!

BTW, I like your seat covers. I almost did not see them...:D
 
cruiserdan said:
That is 5,640 rounds of .30 caliber M2 ball ammunition, about 430 pounds worth.
Click to expand...

I did some calculations on a typical load I would have while on a trip:

Drawer system (full) - 250 lbs
Bumper (above stock weight) - 100 lbs
Long Ranger (tank & fuel full) - 400 lbs
CTT - 110 lbs
Fridge w/ load and slide - 80 lbs
Camping Gear / Firewood / etc. 250 lbs
Spare - 60lbs

Total - 1250 lbs.....:eek:


Maybe I should have gone with the 5"...

:doh:
 
I think 864 actually. This is a fair load:
boating.webp
 
The boat tongue is ~325 lbs. The back was completely full of a week's worth of food (and beer) and supplies for 4 people on Lake Powell. 4 passengers. The canoe weighs ~50 lbs?

I'd guess it at at least 1,000 lbs.
 
Find some one with a set and see if you can borrow them to try.

There is no doubt that they will be stiffer than what you now have. If your current "ride" feels harsh you can expect the 864 to be more so.
 
FJBen said:
...

I don't know what the "more coils" means but they definitely have a lot more coils than the J's.
Click to expand...

There are three basic principles in spring design:
The heavier the wire, the stronger the spring.
The smaller the coil, the stronger the spring.
The more active coils, the less load you will have to apply in order to get it to move a certain distance.

From this page;
http://home.earthlink.net/~bazillion/design.html
 
Jeb and I spoke of the 864 rears versus his current 863's, but you have to remember that even though the 864's boast a 40 lb/in greater spring rate... they also start a full inch lower than the 422's he is running now. All things considered the 422's will net a taller height with his current setup with a slightly softer ride.

Purely academic here (don't make me bust out a FBD ;))

Lets say the rear axle of Jeb's rig is weighing in at 4250 lbs, with the 864's he is only going to get ~6.64" of "sag" from free height, meanwhile the 422's will get ~7.09", BUT when reference from the startpoint... the 422's still stand higher :D Yes I am a nerd... :D
 
cruiseroutfit said:
Jeb and I spoke of the 864 rears versus his current 863's, but you have to remember that even though the 864's boast a 40 lb/in greater spring rate... they also start a full inch lower than the 422's he is running now. All things considered the 422's will net a taller height with his current setup with a slightly softer ride.

Purely academic here (don't make me bust out a FBD ;))

Lets say the rear axle of Jeb's rig is weighing in at 4250 lbs, with the 864's he is only going to get ~6.64" of "sag" from free height, meanwhile the 422's will get ~7.09", BUT when reference from the startpoint... the 422's still stand higher :D Yes I am a nerd... :D
Click to expand...

Yea! What he said...:hillbilly:
 
cruiserdan said:
Well then, in that case I stand "nerded"...............:hillbilly:
Click to expand...

Well, not so quick... my ubernerd number only take into consideration the static load of Jebs truck. The slightly stiffer 864 might react a bit better (personal preference I presume) to swaying, body roll, jumps :D etc... But, we'll have to wait for Jebs results.

On a side note, one great thing about OME coils, is they are relatively cheap... and they are very easy to sell on the used market... so experimenting doesn't have to be too $$$ :cool:
 
The 864's I have are stiff. I am not sure I can detect much difference with 400-500lbs of gear in ride or stance (otherwise stock). I guess the ride is a little less rough, but only marginally. The back will 'jump' on abrupt speed bumps, loaded or not. They flex well. I can say that the stock springs that were on it would begin to sag with as little as 200 llbs.

The ride is very stiff, but I am used to driving trucks, so I am used to it. They do well on washboard roads once you find the right speed. I hope that the 864's fare well when I increase the static load with a 4x4Labs rear bumper (hurry Luke, hurry!) and fuel tank (yet to be determined future mod).

I am so glad I didn't go with the 863's. The ride is good for me, its not like this is some pansy-mall-cruising Lexus :).

Ross
 
A very good over-view.
 
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