Spring mesurements

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Wocka
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Sun Dec 20, 2009 10:53 pm

Hello,

Could someone please measure the length and diameter of 60mm lowered springs (standard struts not coilovers).

Mostly interested in the fronts but rear could help too.

Cheers
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Brianmoooore
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Sun Dec 20, 2009 10:57 pm

Free length of the springs is irrelevant, since the compressed length depends on a combination of the spring rate and their free length.
Wocka
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Sun Dec 20, 2009 11:15 pm

OK I'll have to work the length out then. Diameter would still be helpfull.

Thanks
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Brianmoooore
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Sun Dec 20, 2009 11:22 pm

Diameter will be the same as any E30 spring - I'm not leaving my nice warm living room and going out to the workshop to measure one in this temperature! Rears are 'barrel' shaped, tapering at each end.
Wocka
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Mon Dec 21, 2009 2:15 pm

Right.. OK..

Could someone else measure the diameter of standard or lowered springs then please.

Thanks

[edit]

Maybe I should explain why I'm asking.

I'm thinking of buying some falkener (or similar) springs for front and rear with a higher spring rate than the Spax ones I have fitted at the moment. I need to know the diameter of OEM or uprated springs so I know which size to order.

Thanks
jaistanley
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Mon Dec 21, 2009 4:14 pm

I'm in the same boat..

I have an S50 converted car fitted with H&R springs (from a 325i). It's just a little too low on the front, high on the rear and I'd like higher rates all round if possible.

Need to calculate what rate and length I'll need, but without corner scales it might prove difficult.

Anyone got any ideas?

Jai
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E30star
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Tue Dec 22, 2009 5:36 pm

I was about to type out the dimensions of the Spax ones for you, but you already have them, so not much point!



Working out what rate you want is going to be a nightmare if you're getting custom progressive springs made! Probably the easiest method is getting axle weights for the car, they'll have a much better idea of what you want then. Linear is easy of course.
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