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Discussion Starter · #1 · (Edited)
It's been 2 years since the last time I was at Laguna Seca. The last time was only my second track day ever. Laguna Seca track days are hard to come by at a convenient time, but I was finally able to return this past Friday. I was worried about rain during this time of the year, but it was 60 degrees and sunny!

The track? Very fun. The corkscrew is definitely the highlight. I happen to have access to 4 cameras that day (2 gopros, 1 camsports, and an iphone 4), so I went nuts with the camera views. Unfortunately, my datalogger system was acting up (I didn't fully charge my GPS receiver), so I didn't get much usable logs to overlay my usual stuff. The gunmetal GTR that was chasing me logged a 1:48, so I'm guessing my time was about 2 seconds faster.

My brakes failed me for the first time ever. At the end of my last session the pedal started to feel soft, so I exited the track. As I pulled into the paddock, the brake pedal fell all the way to the floor, and brake fluid was dripping out of the fill reservoir. I boiled over. I just bled the lines with RBF600 fluid the weekend before the event, so I don't think it's a fluid problem. My brake setup (ST43 pads, titanium shims, brake cooling fins, and RBF 600 fluid) has never failed me before even in 100F ambient temps. I'm guessing the reasoning is 2 issues:
a) Braking technique: I'm still learning the track, and I'm unsure about ideal braking points and entry speeds. As a result, my braking technique was poor. Dragging, and increasing the brake force at the end of the brake zone, rather than the beginning.
b) Rotors: I'm still on the stock 2 piece rotors after about 12 track days on the car. The rotors are looking worn, and I'm wondering if they're not dissipating heat like they they did before.
I don't 'think' brake use at Laguna is significantly more intense than at Thunderhill. I've never had braking issues at Thill, so I'm guessing my braking technique was the real culprit.

I swapped out my track pads today and was shocked to find out that 1/2 of the pad had worn away. Prior to this event I had about 8 track days with my ST43s and they barely looked worn up until today. The rotors look pretty worn too. No cracks, but you can see/feel that it's significantly thinner from the wear. I suppose it's time to get new ones. Do I need to get new pads as well, or am I ok with still 1/2 of the ST43s left?

I have a lot of work to do still with this track. For some reason, I just couldn't figure out how to hit turns 6 and 9 correctly. I knew I was way off, but couldn't figure out how to correct it.

Since I don't have data overlay this time, I decided to add 'comments'. Look for the 911 that spun from leaking oil and caught fire. The end of the video is chase video of my friend's GTR that makes ~500whp/500wtq. It's an absolute monster. Surpringly I held my own on the straightaways with my measly 320whp.

The video:
 

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For the first few turns I was thinking, "Why isn't he shifting at all?" Then I looked at your shifter... MR:duh: lol
Commentary was pretty funny!
 

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Thanks Joe, great video, hope to join you out there soon. Got to get the mods on and the car to Bryan for a tune.

Sweet video, I like the comments. Is that porsche that spun and burned the one that would not let you point by?

Those girodisc two pieces and a decent brake cooling kit are on my list.
 

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Discussion Starter · #4 ·
Thanks Joe, great video, hope to join you out there soon. Got to get the mods on and the car to Bryan for a tune.

Got a typo in your link there. Sweet video, I like the comments. Is that porsche that spun and burned the one that would not let you point by?

Those girodisc two pieces and a decent brake cooling kit are on my list.
Fixed the link. Thanks!

The Porsche that burned was not the one that was refusing to point me by. Funny you asked, because my buddies that were there that day were asking the same same thing. LOL.

Yeah, girodisc 2 pieces will have to be purchased before the next track day. We're definitely going to have to do some track days together next year. Deal?
 

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Discussion Starter · #6 ·
For the first few turns I was thinking, "Why isn't he shifting at all?" Then I looked at your shifter... MR:duh: lol
Commentary was pretty funny!
Thanks. The beauty of the SST. Shifts perfectly in auto mode every time.
 

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I am officially jealous
 

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Discussion Starter · #8 ·

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Yeah, girodisc 2 pieces will have to be purchased before the next track day. We're definitely going to have to do some track days together next year. Deal?
For sure!
 

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Yeah, girodisc 2 pieces will have to be purchased before the next track day.
Great video - Laguna Seca is on my list of tracks I have to drive on (if it wasn't on the wrong side of the country).

I used to get overheated brakes all the time with the stock rotors. After I changed to Girodisc 2-piece I have not had any performance loss at all (even at 100+ degree weather). I would still recommend some additional cooling though - there are surface micro-cracks all over my rotors, which suggests overheating.
 

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No need to be! You've got the car, just take it to a track! :thumbup:
Maybe next summer (if I'm home) I can drag Hollywood to a track with me and we can meet up with some other Xs. Then I won't have to be jealous any more
 

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Great video. Nice day at a dream track.

Have you tried Motul RBF 660? I have found it less prone to fade than the RBF 600.
 

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Awesome! As close to ideal track conditions as you can get! I really need to get a 2nd mode of transportation, that way i wouldn't have many reservations in taking it to the track.

What tires are you on? That also plays a huge role in the heat generated at your brakes.
 

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Discussion Starter · #15 ·
Great video. Nice day at a dream track.

Have you tried Motul RBF 660? I have found it less prone to fade than the RBF 600.
The RBF 660 is significantly more expensive than the 600, and soaks up water quicker than the 600. Plus I dont think my problem is the fluid. We will see...

What tires are you on? That also plays a huge role in the heat generated at your brakes.
Still using street compound NT05s. Im happy with them so far. I still dont think im quite ready for race compounds yet. Youre right, though, r comp tires will be even rougher on the brakes

Nice video!

What do you use for editing/compiling the multiple cameras?
Adobe premiere elements. Thanks for the nice comments, guys!
 

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Awesome video. I'll make the pilgrimage to Laguna Seca some time in the next few years, hopefully it'll still be around (noise laws, etc).

The gunmetal GTR at the end chasing you is faster than you, maybe half a second per lap. I'd say your best is probably half a second slower than his.

He made a huge mistake and you walked away, then he caught back up slowly, this shows me he's slightly faster :shades:
 

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Discussion Starter · #17 ·
Awesome video. I'll make the pilgrimage to Laguna Seca some time in the next few years, hopefully it'll still be around (noise laws, etc).

The gunmetal GTR at the end chasing you is faster than you, maybe half a second per lap. I'd say your best is probably half a second slower than his.

He made a huge mistake and you walked away, then he caught back up slowly, this shows me he's slightly faster :shades:
Not to make excuses, but this was the session where my brake fluid was boiling over. The last 2 laps I started to slow down because of my concern about the pedal softening. Then I just pulled off. I edited out the part where I pulled off. Either way, if I'm just just a 1/2 second slower, I'll take it!
 

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Discussion Starter · #19 ·
What fluid will you go with to replace the RBF 600?

Love the video, but not the last 5 minutes that had the rear cam.

I'm going to stick with RBF 600. It should be sufficient for me. I don't think the fluid was the problem. I think getting new rotors and learning how to brake properly at Laguna Seca will solve the issue.

Yeah, I got lazy with the last 5 minutes. My forward facing cams ran out of batteries for that session. I'll admit it's no good either. I just like watching a 500whp car trying to keep up. :godance:
 

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I always enjoy your videos, thanks for making me jealous by getting to go to Laguna Seca... :)
 
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