949Racing

Any wheels that is even close to filling those fenders is going to hit the control arms at full lock. You just have to deal with that or remove the widebody. If you want a staggered look and don't care how it handles, maybe the new 245/40/15 Hoosier in fornt and 275/35/15 in back. This tire is basically a slick and will not last long on the street. The 245 Avon CR500 will be a better choice for street use. Maybe two sets of wheels with street and race tires.

Remember_54

Thanks for reply,

What if i will use 245 avon in front,and 275 Hoosier on back for daily drive, and then order another set of two Hoosier for front as spare, and when need just change front tires?

sixshooter

That sounds like a good plan. It is always good to have spare tires and wheels to make changing easy. I have three full sets of wheels. Some are wide slicks and some are narrower wheels with different tires for rain.

Remember_54

thanks lot guys for your help, as i said i will purchase 4 ea 15x10" +25 rims, and 245/40R15 Avon in front and Hoosier 275/35R15 in rear for daily drive, and 2ea of Hoosier 275 spare for front when i will be on drag or track.

sixshooter

I think you will be amazed at the grip.

Please tell us how you like them.

You will need adjustable coilover shocks and 2.5 inch diameter or smaller springs. The factory springs are too wide at about 3.5 inch and make contact with most wide tires and wheels. And the factory shocks don't let you adjust the ride height and are made to control very small wheels and tires. You will want better springs and better shocks with 300hp.

You might also look at better brakes. Are you still using the stock 1.6 brakes? 1.8 brakes are larger. Upgrading is easy. And there are upgrade kits for even better brakes than that.

Remember_54

Hope you right

regarding shocks i will not able to buy Xida shocks (my wife will kill me i already invest about 10k to engine and gear box

anyway i want to guy with something that will make Miata a little bit comfortable for daily drive, as i said mostly car will be driven on street.

I think i have something about 600-700$ for shock setup, what is a better way to go.

I`m still on factory brakes, and for a moment i found them ok for my daily drive, do not want invest a lot in brakes.

another problem that i`m only one in my city who owns miata, there no such model here.. so it very difficult to find here any part from miatas

sixshooter

The better way to go on your budget is the option below:
You can do this option with new shocks for:
special Bilstein shocks = $120 x 4 = $480
springs = $35 x 4 = $140
Coilover sleeve adjusters = $65

If you get used shocks it will be less. If you use the springs that come free with the coilover sleeve adjusters it will be $140 less but you don't always get the right springs for a good balance. Good shocks are most important thing. If you get the wrong shock valving, the car will ride very badly and you will not like it.

I will help you find the good used shocks if you want me to.

Remember_54

think i will go with new ones, the springs from summitracing are ok? i mean they not very strong? because i need something a little bit soft for daily driving, our city have very bad roads if i get that setup you recommend it will be good enough.. so i think i can go with that setup.

sixshooter

I hated driving my Miata with the stock springs because they were so weak. Every time I hit a bump or dip in the road the suspension would "bottom out", which means the shock would contact the hard rubber bump stops. This is uncomfortable and sometimes painful. The stock ride was very rough because of that.

Race Miatas use 700-900 lbs spring in the front. My car uses 550lbs in the front with a very large 25mm front sway bar and I drive on the street and the track. At 400-450lbs in the front your car will be very good riding.

These special Bilstein shocks are very good for controlling the movement of the wheels to keep the ride comfortable and smooth and still keep control of the car for good handling when you want to drive fast on rough roads.

You will want to cut the stock rubber bumpstop to make it 13mm shorter for better ride as well. This will let the shock and spring move without making hard contact so easily. This will give you about an inch (25mm) more suspension travel at the wheel without hitting the hard rubber.

This is what the stock bumpstop looks like:





This is what it looks like when you cut the bottom piece off:


The rubber bellows doesn't help anything, so don't worry about losing it.

Remember_54

so all spring should be same 400-450lbs i mean in front and rear?

do you have weblink for sway bar, there are a lot of them on the market and which links you use, factory ones?