Apexi Coilovers

[Fabs_32]

Does anyone know how to find out the spring rate on apexi springs?

[Damo_R34]

numbers stamped on the coilover?

How do I tell what my spring rates are?

Ground Control sells Eibach Race Springs (ERS) which are labelled by 3 different values in the following convention: length . diameter . spring rate. However, ERS will come labelled in either Metric (mm.mm.N/m) or English (inchx100.inchx100.lbs/inch) units. 180.64.61 is the same thing as 700.250.350. The conversion from Metric to English is (/.254, /.254, x5.7) "/" means "divide by", "x" means "multiply by".

The math is simple. If K= Spring Rate, then K = (G(d/1000)^4) / (8Na(D/1000)^3), that will tell you your spring rate.

[Fabs_32]

numbers stamped on the coilover?

How do I tell what my spring rates are?

Ground Control sells Eibach Race Springs (ERS) which are labelled by 3 different values in the following convention: length . diameter . spring rate. However, ERS will come labelled in either Metric (mm.mm.N/m) or English (inchx100.inchx100.lbs/inch) units. 180.64.61 is the same thing as 700.250.350. The conversion from Metric to English is (/.254, /.254, x5.7) "/" means "divide by", "x" means "multiply by".

The math is simple. If K= Spring Rate, then K = (G(d/1000)^4) / (8Na(D/1000)^3), that will tell you your spring rate.

Daaaaa..... What the?

Ok, I've read through it a couple of times now as I was replying and it makes sense now. haha. 1st time i read it i was like.....Wha?

Will this be the same for my old apexi's tho? Hopefully they'll have them stamped on the coilover.

I want to know what spring rate they are so I can buy the same rate for my new coilovers.

Thanks Damo.

[Damo_R34]

haha no probs, i found that sifting through info on spring rates, im pretty sure all (well made) coilovers will have the specs stamped somewhere on them, otherwise the distributor wont know what they are selling, and the consumer wont know what they are buying!

[Madaz]

>>How do i tell what my springs rates are