Major Track Faults of the 370

Mike

Tires are 255/295 when I run streets. I thought about the rear sway, but today is gonna dry up. I'm running tein monoflex, but I'm unsure of the rates. Have all shocks set at middle of adjustment range

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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

if you need a quick fix for today...

-2 psi from front tires ***
+2 clicks of compression rear suspension
-2 clicks of compression front suspension

Make sure you have EXACTLY the same suspension settings left and right... count the clicks with precision

Personally, I think you're not running enough front tire... Try using 275/295 next time... or 275/305

If the track is dry, you could also try adding in 1 stop of firmness to rear sway, if you're not there already

*** PSI needs to be evaluated based upon pyrometer readings front and rear... see if you can borrow one from someone at the track and take readings immediately after a session - then come back here and post

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2009 370Z #104
*For Sale*

ChrisSlicks

I would agree with Travis's analysis, you have a very larger stagger at 40mm and that differential is going to be amplified in the wet as you find the limit of traction much sooner.

In the wet I run the shocks well towards the soft side. I think you'll find that in the wet that the stock suspension setup is pretty good and you should try and emulate it as close as possible to enhance feel. The extra bit of body roll is actually very useful in the wet in that it enhances weight transfer and traction.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

Mike

Well, it was too wet this morning to run at all. I did just two laps but there was water flowing everywhere. Track is dry now, so 3 good sessions this afternoon. These are my street tires, normally I'm square too

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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

spearfish25

You need to get a GoPro HD, Mike. I want some videos.

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2013 Cadillac V-Wagon, RIP Z

Mike

I have one, just need to use it some time!!!! bought it a year ago, but never got around to playing with it.

As for my issues, the last 3 sessions were dry and the car went back to performing the way it normally does and it was a thoroughly enjoyable afternoon. I wasn't getting passed nearly as much as I was in the wet. I think I only had to let two cars by actually.

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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

cossie1600

The AD08s are probably not as good as you want it to be in the rain.

travisjb

poor track conditions are an opportune moment to diagnose setup... if you found problems in the wet, and if you can solve them there, I suspect you will benefit in the dry with better times and a more stable car... I went through something like this over the last few months while doing track days with a broken ABS system... opened my eyes big time to pad selection and setup (corner balance, front/rear compression, etc)... and now that I have gotten it dialed in to work without ABS everything is that much better now that ABS is back working

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2009 370Z #104
*For Sale*

Mike

very true, but hopefully, I won't have the wet to work with for a while. its so much more fun dry!

Cossie, the AD-08s are definitely better than my R1s in the rain. I could get rain spec tires, but I'm not that serious. I'm actually thinking of getting AD-8s for my track wheels next. They are a little more than the R1s, but they will last three times as long and get me within a second or two. I don't do time trials, so it really doesn't matter when it comes down to it.

And actually they perform so close to an R compound, its fun to tell people I am on street tires when we talk in the paddocks

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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

cossie1600

Get RA1s if you can, awesome tire in rain and they last for the life of the tire. They are quicker than your AD08, about a second or so.