Couple of things that I use when setting my ride height;
verify tire pressure
level ground or leveled ground (i use cheap floor tiles to accomplish this)
full tank
place your weight in the drivers seat
disconnect one side of sways, front and rear to avoid pre-load issue
after each adjustment bounce and roll the car to settle the suspension
takes some time but I have everything with 1mm
reattach sways with no pre-load, car should still have your weight in it
A Nismo factory setup has the rears at 10mm higher then the front to put more weight in the rear.
If you are going to do this for track work, add remove all the crap out of your car (spare, sub, jack and carpet in the rear) and get a ride height + corner weight + alignment done.
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2016 Sport 6sp Deep Blue Pearl || AAM intake || FI TDX non-res CF + HF-Cats || TEIN MonoSport w/EFDC-II || Hotchkis sways || Z1 34 row oil + ps cooler + diff cover + oil pan spacer || TWM Short Shifter || SPL everything || MA-MS diff cooler || Stillen brake duct || ++
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