Last week, I started playing with the front suspension again, and installed some new goodies.
Before I got started, I figured I'd take some comparison shots of the three different front setups that I've run.
All three setups are within a few MM of each other with regard to fully extended length. Only the Icons are touted as "extended travel", however all of these setups could be labeled as such with regard to down travel. The longest of the three is actually the TRD Tundra/5100 setup, which is a few MM longer than the other two. I didn't take measurements, but I would assume that the compressed lengths are similar as well.
Next, I got the new goodies installed. I went with the extended travel versions from Icon and added the 14" 700lb springs. I figured I'd start off with the basic version and if it's still not enough I can upgrade them with reservoirs, CDC clicker valves, etc down the road.
Passenger side has about 0.5" of preload and is sitting at 38" ground to fender, which is about 0.5" higher than it was with the TRD Tundra/5100 setup on the 3rd perch.
Driver side has 1.25" of preload and is sitting at 38.25" ground to fender, which is a full inch higher than the TRD/5100 setup. I set the coilovers so that the driver side would sit slightly higher with the vehicle unloaded. That should keep it level once I hop in.
For reference, this is how I had the Toytec coilovers preloaded to achieve the same front height. These have 650lb springs on them.
All of my skids (except the IFS skid) are off the rig right now for straightening & paint, so once those are back on and the full amount of weight is present, I'll make some final adjustments to the coilovers to compensate for everything. I don't think they'll need much more preload, maybe another 1/4" per side, tops. At this point I'm happy that I went with the longer 700lbs coils.
Other installation notes....
The large bottom spring cup on the Icons interfered with my limit strap setup, so I had to add a few washers to space the lower limit strap bracket out and away from the bottom of the coilover. Clearance is still minimal, but the two should only rub at full droop.
Adjustment of the coilovers was pretty easy using an Icon spanner wrench, but the force needed to turn the adjustment collar definitely ramped up quickly on the driver side (even after lubricating the threads). Also, they cannot be adjusted on the vehicle because the UCA is right in line with the adjustment collar. I removed them from the vehicle for rough adjustment, then for the latter fine adjustments I removed the lower shock mount bolt to allow the UCA/LCA/spindle to droop down and out of the way.
One other little tidbit: I was always curious how the set screw on the adjustment collar of the Icons was able to engage the threads of the shock body without damaging them. It turns out that Icon puts a small spacer made of clear plastic/nylon on the end of the set screw to prevent metal on metal contact.