Have a set of 275/35/18 Hoosier A6's for sale. One autoX,10 runs,$840 that's for for the cost of three.Reson for selling is we plan to try 285/30/18's next.

 

LOL... Hey, man, even I don't even get 'em for free!!!

 

If it's a track tire/wheel set and you're using it just for the track and would like to accellerate as quickly as possible, why wouldn't one try to get the most gearing as possible? I'd get lower profile tires for my track tires (and do) in order to do this.

 

For the 8 I would agree with you, but for the Z you really don't need to since it comes with enough torque as is. And if you do go with smaller diameter tires, you will have to shift more often that will decrease times and you will have a lower top speed.
Of coarse on the right track, these may be a good thing and on the wrong track these would be a bad thing.
I thought you where on the beach this week?

 

Just got back from Jamaica late last night.

 

A smaller diameter wheel is effectively like a shorter final drive. A smaller diameter wheel will benefit the Z just as well... just for the record, a 275/40-17(compared to stock wheels) is like having the final drive go from the factory ~3.5 ---> ~3.65, nothing dramatic, it can only be a benefit on ALL fronts. (more acceleration due to shorter gearing -close to 4% more torque to the wheels- and lower moment of inertia due to smaller diameter... without any real downsides).

considering a 6600rpm redline, 275/40-17 would redline at... (revup would redline even higher)

38mph instead of 39mph in 1st
61mph instead of 64mph in 2nd
88mph instead of 91mph in 3rd
112mph instead of 116 in 4th
142mph instead of 148mph in 5th
179mph instead of 186mph in 6th (good luck reaching that)

 

+1

 

I think that the point of the smaller diameter for lower moment of inertia is a valid point. But, don't agree that benifits of torque gain outweight the speed.

Now about sizing being the same - there is benifits to mixing up diameters (and you don't have the money for coilovers), you could weigh the car and size the tire diameter to get a better front/rear distribution. Which would help in braking and acceleration.

 

It's not significant enough to change anything. But You can always raise the rev-limiter . It's not that hard to make decent power up until 7000rpm on the 287hp engine, and 7400rpm on the revup.

The grandam cup cars run 3.9 final drives, smaller wheels and rev to 8000+ rpm

 

I really don't want to raise the rev limiter and my torque on my car starts decreasing after 5250 rpm. So I shift her between 5500 and 6000 since I have more torque down in the lower RPM range. And yes, I have Twin's on her.

So do you track your car with Kolia? I think he is Canadian and lives in Ohio. He talked about going to some track events there.

I will be in Canada in a few weeks - Montreal and Toronto. Montreal for the F1 race and Toronto for work.

 

Torque starts dropping at 4800rpm on stock 350z. That doesn't mean you should stop revving anywhere near that. Staying in the shortest possible gear as long as possible is always prefered, even if torque drops down, gear multiplication still largely makes up for it(1st gear at 1000rpm pulls more than 6th gear at 6000rpm... try taking off in 6th gear), not only that, but you are not really interested in raw torque, what you are really after is power.. and power comes with RPMs, fun starts above 6000 rpm ... but if you are TT, I understand what you mean, it's a bit of a different ball game

I am not really from Canada, I am from Italy... but oddly enough, I know Kolia lol... I have known him before he even had a 350z, I met him in Italy, and I believe I am (at least in a small part) guilty as to why he eventually got a 350z himself . (we will be at le circuit mont tremblant at BMW HPDE the 11-13 august.)

GP at Montreal is awesome, you will have a blast.

 

Yes, the car is still pulling HARD in 6th gear, really started scaring me at Roebling when I was reaching speeds of 140 mph and having to brake hard coming into turn 1.
Cool - I have only talked to Kolia on this forum, but he is a really knowledgeble, helpful guy. Show those M3's what a Z can do!
I can't wait for the Grad Prix at Montreal and hear and see what a real race car is suppose to be like, yet wish they where all still V10's.

 

No wonder my ears were ringing! :P

Yes I do track with 275/40R17 and it makes a difference at MidOhio. A bit odd at first, but it allowed me to use fifth gear for more than a quarter of a second on the back straight. Anything helps. I guess the only time we could safely say a shorter final drive is a hindrance would be if you’d be bumping off the rev limiter in sixth gear… Hasn’t happened yet…

Nano did help with my car choice. A test drive at Monza really tipped the balance plus the praises of a fellow test driver a Maserati. The Z is a fun all around car (in summer).

I’m skipping the GP Montreal this year, in favor of the Rollex at MidOhio. I’ll be at Indy for GP USA. I’m hoping to get extra tickets from the scuderia as my parents will be visiting. I’ll miss the V10 sound I’m sure.

We already showed these M3 last year. Well, some M3 Mont-Tremblant is a great track. My mini Nurburgring I call it.

 

I will take some pictures if I can of the GP @ Montreal and post them here.

 

I thought these wouldn't fit over the 18x8s. Please keep updated if these fit.

 

So do you know Kolia from his days working with Ferrari?

 

Can anyone tell me what the diameter of a stock 18" Z Track model rim is? I ask cuz I bought my Track model w/ 19" rims already on it... I'd like to compare. -Maybe I'll buy 2 18" rims for the rear when going to the track, lol

 

Diameter is 18" for the wheel approximately, that is why they call them 18's. Or are you asking the overall tire diameter?

 

Overall w/ stock tires. I know what the 18" name means I was hoping someone would walk out and measure it and post.. :-)

 

If you do that, your traction control and ABS will fault out. You'll confuse them.