Re: H&R Stage 2 sport springs vs. Eibach Pro-kit (Z28Driver)
For the record: Eibach springs are preset twice. This means they are brought to block "all coils touching". there is no way you would be able to come within a 1/4 of that while the springs are on your car. Even jumping your car!!
As for pushing your car, Big Willow Springs 120 mph turn 8 four wheel drift passing a 2002 M3 coming into turn 9 (all day long) enough said.
Without bashing
any other Spring Companies. I have done testing myself with Brand X, Y and Z. Ride quaility which is (subjectable to an extent). Fact of the matter is if you go down more than 1.5 inches on our struts. Your strut is on the bump stop (secondary springs) which on the track is not a bad thing depending how smooth the track is. As for the street it can be down right dangerous. Bouncing around corners because your so far into the bump stop is not cool at 40 mph with a guard rail next to you ( this is from experience.)
Brand X Y Z which did lower the car down more than the Eibachs looked a bit more aggressive which can be a good thing or a bad thing depending on your road conditions ie., snow, deep rutted dirt roads,. A 1/4 of an inch to 1/2 drop over 1.5 inches makes a huge difference on ride quality and body clearance, because that 1/4 of an inch is where the strut comes in contact with the Damper. This increases the suspension rate about 15 to 25 percent over the actual spring rate that Brand X, Y or Z claims. The company may market the springs as a 200 lb. spring rate, however, combine that with a over-damped strut and sitting on the bump stop figure on a suspension rate of about 15% to 25% above that suggested spring rate. This is why valveing a damper according to the spring rate is so important for ride quality sake.
Also take into take into consideration the undue stress the rest of the suspension dropping it down to much.
Believe me VW of america took this into consideration when choosing Eibach as there private label for the Votex kit. They did not want ride quailty, drive line, neg camber out and inner tire wear warranty claims coming out there ears.
Riding on the bump stops on the street you tend to lose performance because your car is in constant unpredicable movment especially around corners w/ bumps
As you can see these are facts not opinions I claim.
Just another dozen or so facts to consider.