Got a track related question? I'll try to answer. - Page 7 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

CSG Mike · 06-27-2013, 04:04 PM

Quote:

Originally Posted by derek1ee

1. what's your tire temperature difference (outside/inside of front/rear) on track and on street? is 10F difference outside to inside on street driving to much?

2. what's your tire temperature difference front to rear? I have rear temp higher than front, ~5F, normal? how can i make them even?

thanks!

Temps depend on the tire used and the rims (width) used. We're optimized for 225/235 tires on 9" rims at the moment, with a spread of 5-15F depending on run time and ambient temps. With 8" rims, outer edges are generally way hotter than the inside and centers.

Higher rear temps isn't a bad thing... I struggle with higher front temps.

10F difference street driving means you probably don't have enough camber for on-track use. Street driving, our car is "warm" on the inside, and cool center and outside. This is purely due to sidewall flex from camber; we run 0 toe front/rear.

ayau · 06-27-2013, 04:11 PM

Is 17x9 on 225 too much stretching in your opinion? Not worried about the wheel popping off the bead? 225 tires are rated with max wheel width of 8.5'', but it's almost impossible to find wheels in 8.5'' 5x100. Any suspension parts rubbing on 17x9?

What's the hotness in track tire at the moment? Rivals? RS3?

CSG Mike · 06-27-2013, 04:59 PM

Quote:

Originally Posted by ayau

Is 17x9 on 225 too much stretching in your opinion? Not worried about the wheel popping off the bead? 225 tires are rated with max wheel width of 8.5'', but it's almost impossible to find wheels in 8.5'' 5x100. Any suspension parts rubbing on 17x9?

What's the hotness in track tire at the moment? Rivals? RS3?

I may be guilty of running 225 on a 9", but these are with tires that are known to run wide...

My tire of choice is still the RS3.

kster1 · 06-27-2013, 05:41 PM

In the Miata world, running a 15x9 with a 225 tire is a very popular setup with the track guys.

CSG Mike · 07-03-2013, 01:07 PM

Bump. I know there's gotta be more questions

troek · 07-03-2013, 01:43 PM

ok heres one. im going to tsukuba in a couple weeks. gona be my first time at a track. any tips?

CSG Mike · 07-03-2013, 01:46 PM

Quote:

Originally Posted by troek

ok heres one. im going to tsukuba in a couple weeks. gona be my first time at a track. any tips?

Take it slow, keep the car under control. Tsukuba has walls...

Make sure you got good brake pads and fluid. Otherwise, have fun!

sw20kosh · 07-03-2013, 01:52 PM

How softly do you grip your steering wheel?

Do you, at all, "hang on" to the steering wheel during hard cornering?

overlookedx · 07-03-2013, 02:05 PM

Do I need a full face helmet or will my open face helmet suffice?

CSG Mike · 07-03-2013, 02:08 PM

Quote:

Originally Posted by sw20kosh

How softly do you grip your steering wheel?

Do you, at all, "hang on" to the steering wheel during hard cornering?

I used to. I had to force myself to relax... constantly remind myself to just hold the steering wheel enough to keep in control. Eventually, it becomes natural.

CSG Mike · 07-03-2013, 02:09 PM

Quote:

Originally Posted by overlookedx

Do I need a full face helmet or will my open face helmet suffice?

That depends on the organization and track; you'll want to check with the organizer of your particular event.

sw20kosh · 07-03-2013, 04:57 PM

Quote:

Originally Posted by CSG Mike

I used to. I had to force myself to relax... constantly remind myself to just hold the steering wheel enough to keep in control. Eventually, it becomes natural.

I think this is why I am so bad at correcting for a spin... I grip the steering wheel and hold on for dear life when the tail end is comin round.

CSG Mike · 07-03-2013, 05:58 PM

Quote:

Originally Posted by sw20kosh

I think this is why I am so bad at correcting for a spin... I grip the steering wheel and hold on for dear life when the tail end is comin round.

I got into a (bad) habit of just letting go of the steering wheel, and catching it when the car's balance "feels right".

I really have no idea where I picked it up, but from what I'm told, it's a drifter thing?

In the s2k, If I do this, it's almost 100% guaranteed that it'll result in an overcorrection and a spin in the other direction, but with the FRS/BRZ, I can unwind and recenter at will.

ayau · 07-03-2013, 06:03 PM

What senses do you rely on when you track? Can you rate them from most important to least important?

eg., visual, feedback from steering wheel, etc.

07-03-2013, 02:05 PM	#93
overlookedx Senior Member Join Date: Oct 2012 Drives: 2015 WRB Limited Location: San Francisco, CA Posts: 1,087 Thanks: 536 Thanked 651 Times in 351 Posts Mentioned: 81 Post(s) Tagged: 1 Thread(s)	Do I need a full face helmet or will my open face helmet suffice? __________________ Superfast Jellyfish

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06-27-2013, 04:11 PM	#86
ayau Senior Member Join Date: Nov 2011 Drives: Some rust bucket Location: Polar ice cap Posts: 3,058 Thanks: 312 Thanked 1,046 Times in 556 Posts Mentioned: 37 Post(s) Tagged: 0 Thread(s)	Is 17x9 on 225 too much stretching in your opinion? Not worried about the wheel popping off the bead? 225 tires are rated with max wheel width of 8.5'', but it's almost impossible to find wheels in 8.5'' 5x100. Any suspension parts rubbing on 17x9? What's the hotness in track tire at the moment? Rivals? RS3?

06-27-2013, 05:41 PM	#88
kster1 Senior Member Join Date: Dec 2012 Drives: 2013 BRZ Location: Fremont, CA Posts: 316 Thanks: 229 Thanked 212 Times in 121 Posts Mentioned: 16 Post(s) Tagged: 1 Thread(s)	In the Miata world, running a 15x9 with a 225 tire is a very popular setup with the track guys.

07-03-2013, 01:07 PM	#89
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,562 Thanks: 8,942 Thanked 14,211 Times in 6,854 Posts Mentioned: 970 Post(s) Tagged: 14 Thread(s)	Bump. I know there's gotta be more questions

07-03-2013, 01:52 PM	#92
sw20kosh Senior Member Join Date: Jul 2012 Drives: 2013 Black FR-S Location: SF Posts: 3,030 Thanks: 881 Thanked 2,014 Times in 990 Posts Mentioned: 153 Post(s) Tagged: 1 Thread(s)	How softly do you grip your steering wheel? Do you, at all, "hang on" to the steering wheel during hard cornering?

07-03-2013, 06:03 PM	#98
ayau Senior Member Join Date: Nov 2011 Drives: Some rust bucket Location: Polar ice cap Posts: 3,058 Thanks: 312 Thanked 1,046 Times in 556 Posts Mentioned: 37 Post(s) Tagged: 0 Thread(s)	What senses do you rely on when you track? Can you rate them from most important to least important? eg., visual, feedback from steering wheel, etc.

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