TravisJB Journal

sig11

Ooh. I would love to drive my 370 at 3055lbs. My 05 (DE) 350Z is 2860 and is so much more fun to drive than the 370 at 3480. Though I think a lot of that is the garbage throttle response in the 370.

travisjb

I'm not there yet on 3055 but agree this car begs for weight reduction. Any event, I'll be running the bigger tire scenario to get to TT2 and so min weight will be 3191 not 3055. I may have to ballast just a bit now that I have phunk's fuel starve kit and will be able to run 1/4 tank

Are you using single mass flywheel, sig?

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2009 370Z #104
*For Sale*

sig11

Nope. I'm mostly stock... getting the car ready for SpecZ. Expected to have it done by now but my cage builder has been really backed up with Miatas. :P Only clutch/flywheels I can run are the stock or NISMO.

This summer I ran better times in the 350 on street tires than I was running last year in the 370 on Hoosiers! Amazing what 600lbs does. My last event of the year I was about 5-6s off of my friends in C6s on conties/hoosiers. Should be right up with them on race tires of my own. I have some fun video once I get some free time to edit it.

travisjb

Awesome weekend at Road Atlanta. First time there - that track is amazing fun but pretty treacherous. Not the kind of place to learn car control. There were ~90 that started the weekend and three cars left in pieces. Drivers seem to be fine, thankfully. Downhill section leading into turn 10a took one, another over-steered out of turn 5 I was told, and the last I think was near start finish (need to confirm).

My times were 1:40/1:41 all day long. Then I took a ride with a local and found some new lines and break points. Unfortunately only got one clean lap to end my day today with the faster line, but very happy with the time of 1:39.14.



Way home... 70 miles short of home base, nice couple honked at me to let me know that I was missing a wheel. Oops, guess these things weren't made for going 85 through crappy Charlotte roads!



BTW, figured out you can just strap the hub with missing wheel to the frame and limp home at 47mph... long drive

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2009 370Z #104
*For Sale*

SPOHN

Great times. What tires where you on? T1 time can always be picked up time wise. Exit of T7 is the tricky one.

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travisjb

NT01 I'm pretty darn close to 100mph at turn 1. I think I have turn 7 down pretty well. Not accelerating enough and carrying enough speed through 10b, 11, and 12... but for good reason as you and anyone that's driven RA would know!

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2009 370Z #104
*For Sale*

Mike

Nice times. I'm at 1:39-1:40 on NT01s

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NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z
Porsche: 93 968 / 23 Macan GTS / 93 968

travisjb

good to know - people at the track were saying slicks are good for 5 seconds... guess that's not how it's worked out for you?

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2009 370Z #104
*For Sale*

M.Bonanni

That's not how it works for anybody. Gotta have the right spring rates, sway bars, etc. to go along with the slicks to make them work properly. They obviously have the potential for a lot more grip but they will completely change the dynamics of a car that's set up for a harder tire. I drove a car setup for R-S3 street tires, threw some Hankook DOT slicks on it and only went a couple of tenths quicker. Made the car nearly un-driveable at speed. Springs were way too soft, sway bars were way too soft, we were hitting the bump stops, bump steer was much worse since the car was moving around a lot more, diff wasn't working as well since the sways were too soft, etc.

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Function > Form

travisjb

Possible you were getting used to the slicks and how far you could push them? I'd be curious to see more data.

As I said, just relaying what some people at the Chin Road Atlanta event were saying about their own experiences and observed time differences at RA. My experience running slicks is only at two tracks, PIR and Chuckwalla. They were good for a couple seconds over my Hoosiers R6's at both of those, and the Hoosiers were good for a couple seconds over my NT01s.

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2009 370Z #104
*For Sale*

M.Bonanni

Nah, it was consistently the same lap time all weekend long. It purely just made the car worse. A lot of times drivers do go faster switching to slicks just by having more confidence in their car thinking that they should be faster. Or many times the stickier tire helps cover up small driving mistakes and aggressiveness with their inputs. So perhaps I should rephrase that simply bolting on slicks to a car that is not set up for them will not make the car faster however it may make the driver faster. The car I was driving I was very comfortable in, very consistent in, and at a track I was also comfortable in. The car had almost a year's worth of setup on Hankook R-S3 street tires and we didn't make any other changes except the slicks. Obviously the smaller the jump between tires the less affect it has and also some cars will be affected less given their setup and suspension geometry. I could get a lot more technical and boring but you get the point.

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Mike

Nah, when I went to NT01s from Hoosiers, my friends told me to expect a 2 second loss, which is about right. The 1:36 was on Pirelli full race slick scrubs I got from Brian Kleeman, they were done after a day but had tons of grip! Hoosiers are about 1:38

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NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z
Porsche: 93 968 / 23 Macan GTS / 93 968

SPOHN

Sad thing I know a couple guys that have done 1:33 on street tires in a 370Z.

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travisjb

3:33?

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2009 370Z #104
*For Sale*

SPOHN

1:33

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