I read this in a past post about figuring out spring rates on the gc's and was wondering if it's correct...
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180.64.44 is metric for 7" long spring, 2.5 inch diameter, and 250 rate.
200.64.67 would be 8" long spring, 2.5 inch diameter, and 380 rate.

The metric-to-standard conversion is (length.diameter.rate) (/.254 /.254 x5.7) / divide, xmultiply
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Is this the correct way to convert the numbers on the box? I have the OTS Civic springs and am just trying to figure out what my rates are...I came up with 330f/250r. Is this right? Thanks for the help. I know I've asked lots of questions about gc's recently. Just trying to figure all this out before I put them on is all. Thanks again!

 

 

I don't know, but I wish I could help you out. Bump for a damn interesting thread that I'd like to know as well.

 

the 380/250 is right.

 

Thanks. I know some people say the rates are 200/180 because of the front numbers, but that couldn't be right. That's way too soft even for off the shelf kits.