VS8

iTrader: (4)

which tires would be best for autocross...these are the only ones i have to choose from Kumho Ecsta Spt Falken Fk-452 Nitto Nt555

VS8

iTrader: (4)

anybody

mwood

You really haven't given any information to make it clear what you need the tires to do, particularly what the entire intended use of the tire is going to be...

Also, I'm confident if you use the search function on the board, you'll probably have enough background and context to figure this one out yourself, which will ultimately serve you better than having anybody just tell you what you "need".

B.A. guess? All the tires you've highlighted would be perfect to learn on, just go with whatever is cheapest.

VS8

iTrader: (4)

i am gunna use the tires for autox once per month but most of the time i will use it as a daily driver

gr8rx

i had the nitto 555's they were ok....wet traction sucked though, never ran the kumos....and the falkens 452....I have the rt615's and they are better all around then the nitto 555's daily and racing.... I really like the 615's....really good daily/track multi-purpose tire
'

chiketkd

iTrader: (5)

I use 245/40/18 Kumho SPT's on my car to daily drive and as my rain tires for autocross. Dry traction is decent, wet traction is excellent!

They're cheap, will last long, and at a wet event you could do quite well on a set. I'd say go with the SPT's for now, and when you can afford an extra set of wheels, make the move to r-comps.

Mr. Pockets

With the mods the OP has on his car (which I assume were not made with autocrossing in mind), he's not going to want r-comps because he can't run in BS. He'd fit into STU for for now, so street tires are the way to go.

I've used a few different 'extreme performance' tires. If you're a novice, just pick one that's not terribly expensive and start learning. Falken Azenis, Dunlop Star Spec, Kumho MX, etc.

Right now, the RX-8 is classed in STU, which means a max width of 275. Next year, the car will likely be in STX with a max width of 265. If you only autocross once a month, I'd recommend finding a 265 or narrower tire so you're ready for that change.

VS8

iTrader: (4)

actually i am getting new rims enkei evo 6 all around 18x8

chiketkd

iTrader: (5)

That's good to know, as they're not a lot of competitive ST* tires in 19" wheel size.

Pockets has some good advice - I'd look at the Dunlop Star Specs as they're super cheap right now.

Mr. Pockets

That's fine, but the rest of your modifications take you right out of stock. It's not just your wheel size.

VS8

iTrader: (4)

what mods take me out of stock

GlenAnderson

Veilside Body Kit, Umnitza/Simota Carbon Fiber Intake,Race Pipe (assuming you mean cat delete)

VS8

iTrader: (4)

i can also guess my new racing beat swing sways bars and koni shocks will take me out of stock class...

GlenAnderson

Shocks are fine, up to double adjustable, and you can change the front sway bar and still be legal for stock...

VS8

iTrader: (4)

i have a question about springs which ones will work the best for autox but still have a drop thats not too aggresive i was looking at racing beat because its half inch drop but i dont know about its performance...is it any good

Mr. Pockets

Springs are cheap, and a bigger concern than brand is spring rate. And with that you literally open a can of worms.

If you're not planning on going to an adjustable coilover, I would try to find a spring manufacturer that offers different rates so that you can make changes if you need or want to. I have no idea whether anybody provides such a thing without going to an adjustable coilover.

Again, however, if you're a novice, I would start with the car as it is right now and wait a good long time before you start making changes. Your suspension is still stock, and in that form it's a pretty good platform for you to learn on. Once you start making changes, it can get complicated real quick, and for a novice it can get overwhelming.

PBlue

iTrader: (1)

since when do evo6 come in 18x8... might wanna look into that?

SouthFL

Read the General Competition Rules and Specifications already to see what modifications you can/cannot do.
This is your second post with "AutoX" in the title which pays no regards to what the parameters are which you wish to engage in. Otherwise, simply read the hundreds of other "what's the best [spring/tire/etc.]" threads.

The first two tires you've listed (FK 452 and NT 555) offer nowhere near any level of competitiveness.
You also have your mind set on springs, which will also alter your classification.

If you're not interested in being competitive and simply wish to run through the cones, then slam, pimp, align, drop, tuck, poke in any modification you wish and go have fun.

suay

I'm going with hoosier all the way for the autocross for my 18 inch rims. tirerack has them for 1200.