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The 24 Hours of Autobahn

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Old Jul 12, 2010 | 08:12 PM
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Arrow The 24 Hours of Autobahn

I had the pleasure to recently attend an AMS organized event at the Autobahn Country Club that ran the South Course for a six 30 minute session day. I drove there friday night which took about 10 hours thanks to a fatal accident closing down the main entry from the east to the Chicago area. There were literally hundreds of cars and trucks sitting on the highway and nobody really knew how long it would be. So I moved a few construction barrels out of the way and did a U-turn hoping I could challenge my Garmin Navigator to find a way around the mess.

Turns out Central Ave was a pretty good shortcut to another on ramp except that it was closed for construction. This sent me north of the highway into a “financially challenged” area of the city where you actually would really need an SUV to navigate these rough roads… and a bulletproof vest probably wouldn’t be a bad idea either! Luckily I made it to my hotel in time to have 4 hrs of sleep before heading to the track in the morning.

After arriving at Autobahn I had enough time to unload the car and get the car teched. Already it was pushing 80* F and the sun was bearing down with no relief in sight. After the drivers meeting to make sure everyone was on the same page, they sent the Intermediate and Advanced group out for some parade laps to get a feel for the course. Then I decided to follow some of the lines that the more seasoned drivers knew for this road course and ended up driving the car so hard that the brakes boiled about 20 minutes into the session. Luckily I was able to slow the car down with my feet out the door and bring the car into the pits for inspection. If it wasn’t for the fact that the Girodisc 2 piece rotors and Raybestos ST43 pads were so good at stopping It might have ended much more dangerously.

Luckily just a quick re-bleed of the Racing Blue brake fluid seemed to have brought them back to life and the second session was fine assuming I got some cooldown laps after doing 4-5 hot laps. Plans are to get another set of ducts to cool the rotors directly in addition to the ducts that cool the caliper area, swap to higher rated brake fluid, and swap in some titanium shims. By session 3 I started to feel more comfortable again but still decided to stick with learning the proper line and not really going for absolute best lap times. One thing that reared it’s ugly head again was the fuel sloshing around in the tank during longer G corners. The Evo X just does not like running below half tank or less on road courses and I was forced to let a race prepped BMW go by when it just wouldn’t hold the turns when powering out.

Session 4 was interesting in that I rounded the corner to the back straight and spotted a red waving flag. This can’t be good! I scanned the area and noticed a white Evo planted up on the tirewalls, apprently his brake line(s) ruptured at ~120 mph and he was unable to stop. It also turns out that 3 laps before I lost my oil cap after not screwing it down all the way and getting distracted by onlookers in the pits. Apparently Pep Boys sells an oil cap that has a threaded end but they had to look it up as a 2009 since the 2008 just failed to list it!

Hopefully I’ll have time to run another track day at Road America with AMS as I had a great time and got another track under my belt reasonably well. Basically this was “The 24 Hours of Autobahn” for me since I drove ~20 hours round trip, 1 hour extra to reach the open house at AMS. and spent about 3 hrs total out on the track. It turns out that 24 hours of driving in 3 days really takes it’s toll and felt worse than the One Lap trip since there was no co-driver to share the overload of driving!

Session 3 video (available in 720p):

http://www.youtube.com/watch?v=Wo3Vv1RUjx0

I started to have fun with the car and avoided abusing the brakes too much knowing I had to drive home after this event!





Session 4 video (available in 720p):

http://www.youtube.com/watch?v=pSJGFelcuXI

This video has a few laps with a passenger along for the ride, then as we round the turn to the back straight during a cool down lap I noticed a red flag waving and spotted a white Evo up on the tire wall.

Last edited by Hiboost; Jul 13, 2010 at 09:30 AM.
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Old Jul 13, 2010 | 10:20 AM
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Girodisc Martin's Avatar
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If by "Racing Blue" brake fluid you mean the ATE stuff, flush it and put it Motul RBF600. Good for another 40ish degrees. Why leave anything on the table?

Looks like fun!!

Martin
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Old Jul 13, 2010 | 10:47 AM
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Yeah, dump the ATE if you're tracking seriously. Motul usually works but needs constant bleeding, but I personally like AMSOIL DOT4. That's what I ran and I didn't get a soft pedal the entire event - although I didn't run as much as you since I was instructing too. I'll be back there this weekend with NASA to really punish the car!

Btw, I had '20 hours of Autobahn'. I got up at 3:30am to drive there - got back home around 10-11pm. 5 hr energy and Red Bull work well together...
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Old Jul 13, 2010 | 11:55 AM
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I absolutely demolished my Ralliart brakes. I smeared the HP+s on the front all over the rotors and wore the stock rears down to the backing plates. The rears got so hot, the piston warped the inner pads backing plate around the piston and melted the piston dust seals. It's a damn shame that Evo brakes won't bolt up to it.

I left Autobahn about 9, dropped the toter off at the shop, went home got ready and drove straight downtown to do the L.A.T.E. Ride. I didn't go to sleep until about 7am Sunday morning. I slept maybe 5 hours, got up, and went to AMS to the open house all day long.

What...A....Weekend!
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Old Jul 13, 2010 | 11:57 AM
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If by "Racing Blue" brake fluid you mean the ATE stuff, flush it and put it Motul RBF600. Good for another 40ish degrees. Why leave anything on the table?

Looks like fun!!

Martin
Originally Posted by boomn29
Yeah, dump the ATE if you're tracking seriously. Motul usually works but needs constant bleeding, but I personally like AMSOIL DOT4. That's what I ran and I didn't get a soft pedal the entire event - although I didn't run as much as you since I was instructing too. I'll be back there this weekend with NASA to really punish the car!

Btw, I had '20 hours of Autobahn'. I got up at 3:30am to drive there - got back home around 10-11pm. 5 hr energy and Red Bull work well together...
Good points guys, probably use ATE Super Blue for the street and then switch to a full bleed of Motul RBF600 for the track. Since they will have different colors it will be really easy to know it's a complete bleed every time as well.

Martin, I'll contact you soon about some additional Girodisc goodness, I've been very happy with how the setup is doing on the track and I seem to be able to out brake just about any car I come across as you can see in the videos. Acceleration I'm usually about even and handling I have an edge against most street tire combos and fall behind the race tire group of course. There's no way I could be that aggressive with the brakes if I didn't know they were there every time for me and I enjoy being able to catch up to other cars in braking zones.
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