Post by
Q45tech »
https://forums.nicoclub.com/q45tech-u112.html
Wed Sep 08, 2004 2:34 pm
New Blacks are about as stiff as 15-20,000 mile Blues depending on the ambient temperature.For the last 217,000 miles I've used Blues on the rear and Blacks on the front. Currently the rear Blues are noticeably different after 27,000 miles but will stiffen up a tad in winter.
The oem Black fronts were just replaced 7,000 miles ago so.
If you use Eibach springs you must use Blues at least on the rear, BECAUSE the Blacks on the rear will wash out and lose control immediately as the 123 lb stock rear springs are increased progressively from 130, 150, 200 as they compress in 1" increments. Whereas the front Eibachs are a fixed [not progressive 167 lbs vs stock 146 lbs per inch]...........the Blacks seem to be able to handle the extra 15% for close to 50-60,000 miles or 4 years.
Inexpensive non adjustables always vary alot with temperature [even though they promise they don't].
If you install Blue rears always do it in the late Spring so the Summer heat lets them feel softer till they break in.
I changed shocks roughly at 50k, 120k, 180krear-200k front, and 240k rear, 260k front.