I am just getting into autocross ive done it about three times now and it is so addicting. and when i bought my Z the guy befor me had already built it perfectly for the track with tein coilover, sways, brembo's, volks, and a few power mods. but i think i need some R-compound tires.. so ive been looking at getting a separate pair of track wheels and R-compound tires.. maybe 17x9 or 9.5 all around with 275s, or 18x9 or 9.5 all around with 275s.







Made up my mind.. im getting5Zigen FN01R-C Wheel 17x10 offset- +25 with TOYO R888's 275/40/17 or any other street drivable r-comp tire.. ill look into that more.

 

R6's/A6's are in a different class in terms of grip from r888's (100 treadwear vs 40). Can't go wrong with rpf1's.......if these are track wheels why do you care about how aggressive the offset is?

 

gotta look fly while flyin those fast lap times yo

 

Don't want to throw a wrench in your plans ... but if you have only done three AutoX sessions I suggest you don't go to R-compound yet. Take it easy and enjoy the first season and buy more seat time. If you want to improve times, try doing a AutoX school with SCCA or something. They charge like 60 bux for it.

 

that sounds like a good idea. is there a website or something that i could find one near me???

 

It's a bit more, but worth every penny:

www.evoschool.com

Come join us, you won't regret it!

 

I've done both (EVO school and local SCCA school). I did not think that you get so much more out of EVO. But then one of the instructors in EVO school was a local SCCA member for us and he happened to be my instructor at the local SCCA school as well. I did the SCCA school about a month before doing the EVO.

So if you consider I paid 265$ for EVO vs 60$ for SCCA, I felt EVO was expensive.

 

Agreed, and RPF1s rock. High offsets are good (and often needed) for big(ger) tires. If you decide on 17s, I have a full set of 275/40/17 Hoosier R5s for sale. R888s are a good balance to drive to/from events, and can autox and track.

 

can you go more in depth in the difference of the R- comp tires? currently im running 275 toyo T1R's in the front and 275 Falken FK452's in the back, and they seem pretty grippy. My main reason for getting track wheels besides better grip is to help conserve the life of my street tires.
and as far as offsets go, im not exactly sure what will fit my car with the brembos and the front fender rolled. so im just following relatively the same offsets as the rims on there now;
-front: 19x9.5 offset +28
-rear: 19x10.5 offset +25


i agree with you that some sort of driving school would benifit me, but why not go ahead and get R-comps? i mean the basics and seem to do pretty well out there..

that is true.. what is the highest offset i can get with clearing brembos? and it will be a month or so before i start making any purchases. but when i do ill hit you up. R5's are pretty much the same as R6's? and how much wear on them?

 

The highest offset will depend on how wide of a wheel you go. I used to run 17x9.5 +35s with 275s, 17x10 +25s, and I believe Mike's RPF1s are 17x9 +35 with 275s. I don't want to punk your thread, but my tires are posted in the tire and the competition forum.

 

if i dont run a square setup, that is probably the size i would run. i know this is off topic but; what is the difference between square and staggered (handling wise)?

 

They are +35 (18's), but spaced to +15 in front to clear the stoptechs and +20 in the rear.

Square: tends towards oversteer (more front grip)
Staggered: tends towards a push/understeer (less front grip).

 

ok thanks. so can someone explain to me the difference in the R-compound tires?

 

r888's, RA1's, NT01's, etc are treaded and 100 treadwear. These are an intermediary b/w the 140-200 extreme performance street tires and the full face 40 treadwear hoosiers, but are still an "R" compound. They are treaded and obviously do better in the rain than the hoosiers. They also last longer, but at the expense of less grip than the hoosiers. Some people, particularly in drier climates, run the 100 treadwear tires on the street as well.

 

ok thanks, i think ill probably end up going down the r888 route, since it would be convenient to be able to drive to the events, rather than some how transporting my track wheels to the event.

so ive been doing a little researching, and the 5Zigens have caught my eye due to how cheap-relatively light (under 20lbs) -and the awesome concave lol.

-would these fit without rubbing and clearing brembos?
5Zigen FN01R-C Wheel 17x10 offset- +25
with: 275/40/17

-front fenders are rolled, and im coilovers

 

You should be fine.....how much lower than stock are you? I do know of people that put hoosiers on and drive too autox/track events, but the treadwear is such that most wouldn't because of the cost. NT01's are little cheaper and I've heard mostly positive reviews on them.

 

They fit no problem - see lots of pics here: https://my350z.com/forum/competition...-r5-tires.html

I ran a small shim spacer in the front because the 275 Hoosiers are wider than most other 275s. You should look in the wheels for sale forum - those wheels are in there a lot and that is a common size.

 

thanks scott. what size/offset are those?

 

not exactly sure.. bought the car with coilovers already on, and i dont know how much he lowered it. but i'd say about 2 inches maybe a little less

 

Even with your fenders rolled....a 2" drop could cause some rubbage with a 275 front, but I can't say for sure as my car is only lowered an inch. Keep in mind the compression of the suspension under load will drop the car even more on any given corner.