Brakes @ Summit Point this weekend ...

b1adesofcha0s · 08-24-2012, 12:01 PM

Quote:

Originally Posted by takjak2

You don't want to put too much tire onto a skinny wheel; ie 275s (275mm=10.8 inches) on the 8" front base wheels. They won't be well supported and will roll over the rim more easily. Best case is terrible camber wear on the outsides.

265/285 on nismo wheels is almost neutral and without a good camber option on the front is the best I could do for wear right now. The primary function of a square setup is to allow you to rotate tires front to rear to even out wear. To do that effectively means using the same size wheels front and back, which then calls for spacers in the rear. In the meantime you are giving up potential grip by not running larger rears. The Z is blessed with an excellent capacity for MOAR TIRE. With stock weight distribution and plenty of power to put down I don't see the major appeal of matching front to back.

tldr Beef up the fronts, but keeping a stagger will see the best performance.

I think you misunderstood what I was saying. I'd be running a set of 4 base rear wheels, which are 18x9 and 275's fit just fine on them. I had 275's on my last set of rears and they were fine. I could also do the same wheel setup with 265 F and 275 R for a little bit of stagger without fitment issues (assuming I can't just fit 275's up front).

Also, sorry for hijacking your thread Craig. You could probably make use of all this information too since you're also running the base wheels. I can start a separate thread for this discussion if you like.

cossie1600 · 08-24-2012, 12:32 PM

Isn't Nismo wheels 9.5/10.5? If I can run 285 all around on my 9/10, you can easily do 295 all around on yours. I am getting better wear on my 285F than my 265F, but I think it has to do with the fact the car understeers a lot less and I am not using so much steering to compensate. The 370 is front heavy to start, the bigger the front tires, the better the car will turn and drive. I do 285 because 275/30 and 295/30 puts the car too low and 295/35 is too high and it is a stretch on a 9" front rim. It has nothing to do with rotation, but I did keep the 285 from my first set as spares.

I don't have a direct comparison of the two tires in terms of lap times since I haven't done the same tracks with the two different setup. There are too many variables in autox to say, but my gut feeling tells me the car feels better (probably adds up to like .2 sec in terms of times). My average finish position also went slightly higher too, but that probably has more to do with competition than anything else. I got 200 runs on my 265/285, I am approaching 170 runs on my 285 and they look like they got about 40-50 runs left.

275 on a 9 is fine, I wouldn't do it on a 8.

Quote:

Originally Posted by takjak2

You don't want to put too much tire onto a skinny wheel; ie 275s (275mm=10.8 inches) on the 8" front base wheels. They won't be well supported and will roll over the rim more easily. Best case is terrible camber wear on the outsides.

265/285 on nismo wheels is almost neutral and without a good camber option on the front is the best I could do for wear right now. The primary function of a square setup is to allow you to rotate tires front to rear to even out wear. To do that effectively means using the same size wheels front and back, which then calls for spacers in the rear. In the meantime you are giving up potential grip by not running larger rears. The Z is blessed with an excellent capacity for MOAR TIRE. With stock weight distribution and plenty of power to put down I don't see the major appeal of matching front to back.

tldr Beef up the fronts, but keeping a stagger will see the best performance.

Quote:

Originally Posted by b1adesofcha0s

I think you misunderstood what I was saying. I'd be running a set of 4 base rear wheels, which are 18x9 and 275's fit just fine on them. I had 275's on my last set of rears and they were fine. I could also do the same wheel setup with 265 F and 275 R for a little bit of stagger without fitment issues (assuming I can't just fit 275's up front).

Also, sorry for hijacking your thread Craig. You could probably make use of all this information too since you're also running the base wheels. I can start a separate thread for this discussion if you like.

sixpax · 08-24-2012, 04:30 PM

Quote:

Originally Posted by b1adesofcha0s

Also, sorry for hijacking your thread Craig. You could probably make use of all this information too since you're also running the base wheels. I can start a separate thread for this discussion if you like.

No worries ! I am learning stuff

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