Team NAXJA/Petty Cash Racing stock class KOH XJ build

never mind - torque tube only fits '00+
 
RWKHausSupply said:
Rock Krawler has tripple rate springs that prolly would have worked out also. They are for their new JK line up so made for the little extra lbs over a tj/xj also.

Oh and at about 150 a pair not very bad cost wise either. They have a 1.5, 2.5 and 3.5 lift which is about 2 up to 5" on a XJ and then even more in your case due to the tube OD and brackets.
Click to expand...


Would be interesting to try, but probably not spend money on without good info. The overall length to avoid coil unseating, the need to compress the spring 7" with a 750 lb corner weight, and the desire to sit on 250ish lb springs at ride height are the competing issues and hopefully this is a good solution. We'll find out in a few days. We want the spring to have a slight preload at full droop, and a 750 lb corner weight compressing 7" means a 107 lb primary spring rate, which is pretty soft. The car is sort of tall and stability is important, so we really want the heavier spring rate at ride height. Not easy to come up with a perfect solution. Two coils and a slider allows it all to happen.
 
Goatman said:
Would be interesting to try, but probably not spend money on without good info. The overall length to avoid coil unseating, the need to compress the spring 7" with a 750 lb corner weight, and the desire to sit on 250ish lb springs at ride height are the competing issues and hopefully this is a good solution. We'll find out in a few days. We want the spring to have a slight preload at full droop, and a 750 lb corner weight compressing 7" means a 107 lb primary spring rate, which is pretty soft. The car is sort of tall and stability is important, so we really want the heavier spring rate at ride height. Not easy to come up with a perfect solution. Two coils and a slider allows it all to happen.
Click to expand...

You mean kinda like this lol
triple_rate_coils-M.jpg


Oh and yes your needing a Soft rate. a JK is like 4500lbs + with about a F55/R45 split I would imagine.
 
Last edited:
I'm a Rock Krawler dealer too. The Deavers we were running are very progressive, at least triple rate (we put them on a spring dyno), and so are the PAC springs we're using. The RK diagram looks like a sales piece, doesn't say much except explain the concept of a progressive rate coil, though it looks good and does seem they are trying to address the issue. I am curious about the "dead weight" section. It can't be just dead weight, it has to have some spring rate. We don't just want a tender coil to keep the coil from being sloppy when it unseats, we want spring rate to push the axle down and the shock out. Also, I found that too much of the coil with thick wire and little spring rate doesn't help us get to the spring rate and ride height numbers we're targeting. The only way to know would be to buy a pair and try them to see what we got. I'd need an overall length first, might call them and ask. I calculated a ton of different combinations before going with this, and this came out where I wanted it. We'll see soon enough.
 
rockclimber said:
what are the extended and collapsed lengths of the deaver coil?
Click to expand...


The Deaver Jeepspeed coil we have been using is 21" long. Don't know compressed length, which really isn't an issue since we never compress it all the way.
 
I like where you guys are going with your front and rear spring set ups.

Do you foresee any issues with the upper spring, on the front, binding?

It looks like you could use a slider from a 2" coil over and build a slider stop to keep that spring from blocking out and breaking.

This could eliminate some body roll as well if that spring isn't fully compressed at ride height.
 
PAC says the springs are tested at block height and are fine to run that way. We're already using sliders from 2" shocks, one between the coils and one at the top for a spring seat.
 
GO GO GO

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2ypfzft.jpg
 
Richard just spanked aftershock and I believe is currently in 4th place
 
v4uli1.jpg

27yzytv.png
 
currently at remote pit 2 and possibly in 2nd place............its hard to tell.
 
yeah hard to tell what place they're in but they cakewalked aftershock when most of the the rest of the group got stuck, and now behind them there is a big parking lot at aftershock. made it through just in time! :thumbup:
 
oh no 0 miles per hour at race mile 83!!!!
 
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