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11-18-2013, 03:48 PM | #1 |
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2013 Blacktrax Performance Thunderhill bypass config track day
I went out for the first time running the bypass config of Thunderhill yesterday. Blacktrax hosted an excellent track day with a lot of fast cars (mostly S2000s) and nice people.
My lap times weren't very great but I had a good time and my lap times dropped a good 5-6 seconds from beginning to end. The best I got was a 2:19... which is pretty slow compared to most fast laps in the M3. For comparison I ran a 2:11 in the Evo X running the same track config. I tend to run slower in Bypass config vs Cyclone config. In Cyclone config, I got a 2:17 in the M3 and 2:09 in the Evo so about 2 seconds slower. Kinda scary going over that blind crest so I brake there. Looking at my fastest lap, I can see all the places I am braking too much or not on the throttle. Lots of things I can improve as well. The biggest thing for me is getting more confident in getting on throttle when it isn't straight. I always run with no traction control. I spun out at Thunderhill my last track day into the dirt so I try to be more careful now... It's my only car so I need to get home and be able to drive the car to work the next day. Anyway, here's the video: Below are my lap times. As you can see, getting better throughout the day. Still need a lot more seat time... and balls.
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Last edited by Z K; 11-18-2013 at 03:56 PM.. |
11-18-2013, 04:17 PM | #2 |
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Nice. Glad to see that you made it thru T9 downhill uneventfully this year.
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BRP 1:56 | CVR 2:01 | ACS 1:53 | WSIR 1:34
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11-18-2013, 04:30 PM | #3 | |
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After that off, I lift there to prevent that from happening. I can feel the car get light in that section. I'll stay neutral throttle until it settles back down and then WOT again. I see tire marks going off the course there so I know I'm not the only one to have that happen to them.
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11-18-2013, 04:52 PM | #4 | |
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Oh yeah, cuz a bunch of us in SoCal were planning a Thunderhill-Infineon-LagunaSeca trip when I saw your video. When we ran Thunderhill in June, I made sure I eased over that hill, hah.
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I think you can stay on throttle if you just unwind the steering wheel and track out to the left side of the track. If and when I go back, that's what I'm planning to do.
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Last edited by OC3; 11-18-2013 at 04:58 PM.. |
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11-18-2013, 05:04 PM | #5 |
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A lot of people do that. Let it track left and then bring it back right to make the corner. I need to work on that.
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11-19-2013, 12:02 AM | #7 |
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Looks like fun. I've only been to T-Hill once, for a club race weekend in 2009 in my J-prepared (non-aero though) E36M3 (w/2.8 motor, cams, injectors, exhaust, NT-01s, PFC-06's, 2990lbs w/driver). Oh, and I found out later after I sold the car that the tune was wrong and I had left 25hp on the table...
We ran the bypass the second day, the cyclone the first day. First weekend ever at T-Hill. I checked my times (on the BMW CCA CR website) and my best time was 2:04.84 for the bypass. Of course, I had a trailer to push the car into if I wadded it up so I understand the need to drive the car home bit. With your data acquisition, you should be able to see where your g-force curve isn't shaped like a "T" and work on those areas (as well as not coasting so much). Using all the track will help too. The E9x is a handful to tame as I have found out, so keep at it and build up in small increments. Don't try to do it in one bite, or you'll likely get bit!
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11-25-2013, 06:24 PM | #9 |
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I have the traction control off.
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11-25-2013, 06:30 PM | #10 | |
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