G'day everyone.

I started putting together an elaborate answer over the weekend and realised that it all sounded rather familiar. A quick check of the www.suspensionparts.info forum showed that I'd already covered around 90% of the issues in one of our Tech Talk series. Here's a link to the specific thread;

http://www.suspensionparts.info/show...=&threadid=272

Would be happy to continue with further questions or discussion after that.

Alfy, we try not to talk about sales or pricing on forums etc, would rather keep it technical. Would you mind contact one of our distributors or our sales area on sales@whiteline.com.au.

tinkerbell, you raised a very good point re comparisons of spring rates, I guess I took this issue for granted and as a given when commenting before as it works toward our argument in a way.

All common suspension systems have a motion ratio, by this we mean that the wheel and spring do not move at the same rate for a given amount of travel. Its a standard part of our design process and we measured, the EJ-EK to have a spring to wheel motion ratio of 0.67:1 at the front and 0.81:1 at rear.

That means that for every millimetre of wheel travel at the front there will only be 0.67 mm at the spring. The rear is a little closer at 0.81 mm at the spring for every 1 mm at the wheel. To put into context, most conventional strut based cars like Commodore and WRX will have a ratio of around 0.95:1. Needless to say this will have a bearing on the actual spring rate at the wheel which is significantly more important than the rate at the spring and what we actually calculate when we design our suspension products.

As for the affect this has on the numbers specific to the Civic, I'll let the above settle a little bit before we go further.

Cheers
Jim

Whiteline