figured i'd give this a decent answer for posterity's sake.i came up with 0.914 and 0.703 front and rear, respectively. those were rough measurements, not too precise, and include the angles of the coil-over-strut. my suggestion though would be to use spring rate to tune natural frequency. that just basically means use spring rate [and dampening] to tune to the track frequency, then use sway bars to tune balance front and rear during steady-state cornering. i'm a fan of ~10% higher front nat'l frequency myself, as it also tends to give better turn-in.
~Jason, PayPal Verified (20), also on honda-tech.com with the same user name.
DD: '05 RSX w/ Leather; '94 Toyota Corolla DX (beater)
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