MindBomber

[Springs]
Stock EP3: Spring Rate: (248 Front/440 Rear)
Stock RSX: Spring Rate: (279 Front/458 Rear)
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Dropzone: Spring Rate: (? Front/? Rear) - Drop: (2in all around)
Eibach Pro-kit: Spring Rate: (15-20% more than stock) - Drop: (1in Front/1.1in rear)
Eibach Sportline: Spring Rate: (20-25% more than stock) - Drop: (1.4in Front/1.5in Rear)
GoldLine Springs - Spring Rate: (?) - Drop: (2in all around)
H&R Sport: Spring Rate: (25-30% more than stock) - Drop: (2in all around)
Neupseed Race: Spring Rate: (200 Front/280 Rear) - Drop: (2in all around)
Neupseed Sport: Spring Rate: (200 Front/280 Rear) - Drop: (1.5in Front/1.5in Rear)
Progress: Spring Rate: (280 Front/500 Rear) - Drop: (1.8in Front/1.5in Rear)
Sprint: Spring Rate: (20-25% more than stock) - Drop: (2in all around)
Spoon Progressive: Spring Rate: (413 Front / 458 Rear) - Drop: (1.5-1.7in all around)
Tanabe df210: Spring Rate: (10-15% more than stock) Drop: (2in Front/2.3in Rear)
Tanabe nf210: Spring Rate: (10-15% more than stock) Drop: (1.5in all around)
Tanabe gf210: Spring Rate: (20-30% more than stock) Drop: (1.3in Front/1.5in Rear)
Tein H Tech: Spring Rate: (257 Front/476 Rear) Drop: (.8in Front/.7in Rear)
Tein S Tech: Spring Rate: (280 Front/515 Rear) Drop: (1.4in Front/1.3in Rear)

[Ground Controls]
Dropzone: Spring Rate: (? Front/? Rear)
Ground Control EP3 kit: Spring Rate: (375 Front/450 Rear)
Skunk2 Coilovers: Spring Rate: (440 Front/330 Rear)

[Full Coil-overs] Spring & Shock (fixed height)
Mugen: Spring Rate: (283 Front/439 Rear) Drop: (1.4in all around)
Honda Factory Performance: Spring Rate: (? Front/? Rear) Drop: (?in all around) - very similar to the mugen kit, awaiting specs

[Full Coil-overs] Spring & Shock (adj height)
Buddy Club Racing Spec: Spring Rate (559 Front/894 Rear) (Adj ?? min - ?? max)
D2 Racing: Spring Rate (447 Front/559Rear) (Adj ?? min - ?? max)
JIC FLT-A2: Spring Rate: (504 Front/560 Rear) Drop: (Adj stock - 3.5in max)
KW V2: Spring Rate: (340 Front/515 Rear) Drop: (Adj 1.4in min - 2.6in max)
Omni Street: Spring Rate: (559 Front/445 Rear) Drop: (Adj 0in min - 4in max)
Omni Sport: Spring Rate: (670Front/559Rear) Drop: (Adj 0in min - 4in max)
Progress C1: Spring Rate: (350 Front/640 Rear) Drop: (Adj 1in min - 4in max)
Tein Basic: Spring Rate: (336 Front/448 Rear) Drop: (Adj ?? min - ?? max
Tein Type Flex: Spring Rate: (448 Front/559 Rear) Drop: (Adj ?? min - ?? max)
LSR: Spring Rate: (550 Front/450 Rear) Drop: (Adj 4 min - 4max) 12-way adj

[conversion rates]
1 kg/mm = 55.88 lb/in
1 N/mm = 5.588 lb/in

[What is Progressive Spring Rate?]
Progressive rate springs are likely “all-in one” solutions. They are often used on performance aftermarket kits like Eibach or others, and they are good for daily performance street driving. They help you achieve the highest performance when driving hard, while providing a smooth, comfortable drive the rest of the time.

[What is Linear Spring Rate]
Linear springs are more often used in drag racing, road racing, track and races that require a “high spring rate”, in which a constant spring rate is more important than a smooth ride. They are still popular because they are:

1. Easier to produce and can be made to lower a car beyond the point of progressive rate springs.
2. Easy to work with, because the spring rate never changes, allowing quick chassis set-up.
3. Inexpensive, allowing most race teams to use several different sets depending on track conditions