Originally Posted by Callisto

Ok so don't take this wrong... I am sure you will but you are trying to upgrade for street driving a really bad choice of a vehcle in all respects. Not to mention some of the things you have come to understand having to do with upgrading suspension is just wrong and dangerous. A couple of what you think is short comings in the Mazda is actually your shortcoming in driving abilities. As for [parts while many parts will interchange and can be used on your Mazda that does not mean that they are inferior to what you want to do.[u]I rune rear KYB GAS-Adjust on my Mazda and there is no application guide for that or even for many other Mazda's. However, being somewhat experienced in building Road Track vehicle and suspension parts I looked into the actual specification of the KYB dampener I was wanting to use. This is the same for your thoughts on coil springs. You need to learn the difference between progressive and non-progressive spring and then the spring rates published by the manufacture and then use math to determine if they are the best choice. And lower your Mazda as much as you want is not only ridicules for a non-Track only vehcle but will actually make for sudden unexpected weight transfer in off camber roads dangerous. Ther is no fundamental reason to lower a street vehcle that low except to look "KOOL". Not to mention toss the steering geometry right out the window unless you engineer a way to bring it back to the Mazda engineering specifications. In all your info you failed to even mention anti roll bars and frame strengtheners. If you continue with your thought process and how you describe where you drive you will twist the body, and it will react badly and so fast that you are likely end up off the road.

I could go on, but I can see the responses now coming and frankly while I do appreciate a good project I also hate reading when someone is so far off from build or upgrading something that will in the end just be a waste of money time and likely be an unsafe vehicle. Oh and look at the power to weight ratio,,,, no comment.

Sorry Dude I know this is an unexpected response ................. but someone should and needs to tell you?