Anyone know what the stock spring rates are for the FC? I know N/A & Turbo vary, so let's just say what the stock rates are for the Turbo.

I know mazdatrix has something on their site that says they're something, but they say that they couldn't accurately measure that to be sure. I think it was like 90 lb/in front and 80 lb/in rear or something, that's what they came up with on their tester, but they said it probably wasn't correct.

Anyone know what the stock rates are though? New... not worn out & droopy.

 

The only figures I've ever heard are those produced by Mazdatrix 95lbs/inch front 90 rear. The figures have been published in books as well. Did Mazdatrix give you any reason why they suspect their numbers are out? I've always suspected their racingbeat spring numbers were out...

 

From their website:

In order to help answer many of our customers questions, and to satisfy our own curiosity, we compiled the following chart of spring rates. The numbers are from our own spring tester and should be used to show relative differences - not necessarily for the absolute rate number. The dual numbers are for progressive rate springs. This design type uses a lower rate for normal ride, then progresses to the stiffer rate when compressed while cornering.