I put a set of front and rear IRO springs under my ZJ. I measured before and after the lift to discover I gained 6.25" of lift. All measurements were taken with the same wheels and tires on. I did a search and found there were a few others that stated the IRO springs yield a little more lift than advertised, but nearly 2"? Could you other IRO 4.5 guys measure from the ground and the hubs to the wheel openings and post your results please. I have my measurements wrote down at work, so I don't know the exact numbers at the moment. I'm just curious as to what everyone else comes up with. I'm not worried at all about the height I got, just wondering what to expect after they settle in.
They normally yield an extra 1" or so, but your's sounds like a lot. Could be that since you have the 4.0 you are getting more, because it's lighter. Whatever the height, I can't see them sagging more than 1" over time. Usually when they give a spring height to a spring, it's what they will eventually settle at after weight and wheeling.
99 GC Limited - 4.7L HO V8, 6.5" IRO HC LA lift, F&R D44s locked & trussed, 242HD, IRO TC Skid, KMA Bumper, 35's 2006 Saturn Redline -2.0L Eaton supercharged I4, GMPP Stage 2, Custom Tune, AEM CAI, Ebiach Pro Kit w/ swaybars, EVO Ventus V12s (13.76 @ 103.85) 2006 Pontiac G6 GTP 2012 Nissan Juke - (hers) 2000 SV650 - naked, integrated tail light, sliders, corbin, pilot roads, RK chain & sprokets, D&D full exhaust, FactoryPro Stage I jet kit, +4 Ignition Advancer, Barnett race clutch 2006 Triumph America 900 - Full Dresser
Yes, you can expect to have your springs settle 1 to 1.5 inches.
00 4.7 Laredo...KYB gas shocks, ADDCO rear sway bar and Firestone Destination tires.
08 Z71 Suburban, front leveling kit with rear spacers. 285/65 18s Nitto TerraGrappler G2s
94 5.9 Laredo 6.5 RE lift with 35 Maxxis Bighorns
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They will settle. But then again, I am at 3.5" spring plus 2" BB which should be 5.5" lift....yet I am at 6.5"in the front settled and 6" in the rear.
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Michigan, are you using adjustable long LCA and UCA or just the stock ones? I'm really interested in adding a bit more lift than my 3" but I'm not ready for the added cost of adjustable LAs. Thoughts?
I do still have the stock control arms all the way around. I'm gonna add rear lowers first, and then uppers. I can't afford to do them all at once. I'll do the the same to the fronts as money allows. So, I'm on the lookout for some used control arms.