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Old April 14th, 2009, 11:30 PM   #1
ChrisZang
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Nitto NT-05 first impressions and a BIG question

Hi,

this is a follow-up to my own thread: http://www.babblers.org/forums/showt...p=54484&page=3

So, I finally took my new Nitto NT-05 to the track (Laguna Seca) yesterday and here are my first impressions: Very good tire, sticks well for a street tire and very predictable when getting on the edge of traction: It starts to "talk" and is easy to catch once it's starting to break loose, so overall similar behavior (in terms of predictability) to the Victoracer V700 I had before.
It's hard to compare times, my best lap time with the Victoracers in Laguna was 1:49 flat and the best lap time with the Nitto yesterday was 1:52.6.
However the track yesterday was quite cold (and somewhat my brain too) compared to the time with the V700 which was done on a much warmer track. In the end I would expect that the Nitto will be around 2 sec slower / lap.

So I am quite happy with it, with ONE CAVEAT:
I have the tires on my car for less than 1,000 street miles and one track day and while the fronts have almost no wear I managed to scrape almost 2/32 of the rears The wear is even on the tire, so no camber issue here.
I am not "drifting", but yes the rear end comes earlier than the front.

Here is the BIG question:
I had the car lowered with Eibach springs last year:
Mark at Sporttech told me that he was not able to completely compensate for the additional toe-in in the rear.
Is it possible that the additional toe-in will create so much additional wear on the rear tires? In other words: do I have a good excuse to buy adjustable rear toe arms
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Old April 14th, 2009, 11:45 PM   #2
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Chris,
hasn't your car always gone thru rear tires quicker than fronts.

rear tire wear being greater than fronts is a pretty typical Boxster trait.

On my '99 I had H&R lowering springs with a good alignment (Sportech) and had very good tire wear...but the rears always wore quicker...before and after lowering and alignment.
I will bet you that with similar track temps you will be within .5 second with the O5s as compared to the Victors.
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Old April 15th, 2009, 12:16 AM   #3
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yes, you're generally right.
I am just worried about how quickly I go through rears now.
At this rate the Nittos (200 UTOQ) will last - well - 4 track days.
The Victoracers (50 UTOQ) lasted longer than that ....
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Old April 16th, 2009, 10:26 AM   #4
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btw, here's the video from last Monday:
[ame="http://www.youtube.com/watch?v=D8Jz0mnjy4g"]One lap in Laguna Seca - YouTube[/ame]
(I got a new camera and am still trying to figure out the best mount point, as you can see in the video
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Old April 16th, 2009, 10:33 AM   #5
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Toe

Chris,

I think that when the toe adjustment has been out of wack on my car, the symptom has been scalloping on the edges of the tread. If I'm right about this and your tires are wearing evenly across the tread, then I'm guessing you might not have a toe issue.

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Old April 16th, 2009, 10:59 AM   #6
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Thanks Doug,

I will check that
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Old April 16th, 2009, 01:52 PM   #7
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almost as fast as my 2.0L 914 Chris!

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Old April 16th, 2009, 02:53 PM   #8
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yeah, yeah, just rub it in ...

First Carl Switzer gives me a ride in his street legal (?) 993 race-car and makes me feel like I am crawling, and then here's insult to injury

I got it!!! It *MUST* be the tires, it can't be the driver
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Old April 16th, 2009, 10:32 PM   #9
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now that is funny....
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Old April 17th, 2009, 02:32 PM   #10
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Quote:
Originally Posted by ChrisZang View Post
btw, here's the video from last Monday:
http://www.youtube.com/watch?v=D8Jz0mnjy4g
(I got a new camera and am still trying to figure out the best mount point, as you can see in the video
Quick question, Chris. I noticed in some of the photos from the Thunderhill event that the Boxster had it's top up. In your video the top is down. Is there a performance difference between top up or down with regards aerodynamics?
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