Dear Z friends,I wrote earlier today about the best size tire for a 16x7 wheel.I went to the mazda site and calculated the tire size and closest size was a 225/50/16 that matced the hiegt of the original wheels,my question is if I went to 60 series tire would it fill the gap even more or would it just simply raise the whole car and the gap would just stay the same.I am trying to close the gap without changing the springs.THANKS,ROBERT
Changing the gap substantially without changing springs? That's like trying to get an additional 100 hp outta your car by just putting in new plugs...you need a blower or NOS. Same thing with your tire to well gap, you can't really overcome it without changing springs. Now you can put like a 17" wheel on, and a much larger tire and that'll fill it up some, but just look retarded and throw your speedo way off. Springs aren't all that much, if you really want a lower look, you're going to have to bite the bullet and actually lower the car. Makes it handle WAY better. That way you can run the lower profile 50 series, and handle better than a 60 series.
I went with the 225/60/16's on my 81 turbo. The fender wells were filled and didn't rub a bit. As a matter of fact, the rear fenders were about an inch below the top of the tire. Fronts didn't rub either.
you can cut them a little, just make sure you do it with an angle grinder or something similar and NOT a torch. A torch ruins the temper of the metal and will make them soft. A hacksaw won't touch it.
If you imagine uncoiling your spring into a straight rod and twisting it, thats how it works. Due to its coil shape, when force is applied, the rod twists. So if you chop the spring, you shorten the rod. Obviously a shorter rod is more difficult to twist, so by chopping your springs you are increasing your spring rate, making the ride stiffer.
The problem lies in chopping them too much, if you try to lower your car 1.5" by chopping, you're gonna end up with a Z that rides like an unladen dump truck. I have exaclty one coil cut off mine and it rides pretty nicely. I could probably get away with another half turn before the ride became too unbearable.