03-22-2016, 10:39 AM | #67 |
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For what it's worth, I have a full data acquisition system in my track car (Racekeeper) w/ 10hz GPS. Before I had this, I used the Harry's Lap Timer app on my iPhone, using the built in GPS. Just for the heck of it, I tried them both at the same time last year, and it was pretty amazing how accurate the iPhone based lap timer was. It was within 0.1 sec (and sometimes less) on ALL laps. I have to assume from this that the app, though only sampling position at 1 hz, extrapolates from that what point in time you crossed the start/finish line. It doesn't just wait until the first position fix after you cross the line and call it good, it figures out how far past the start finish you are at that fix and then uses your velocity to figure out what the time was when you went past the line. Clever.
I'm less skeptical about the lap time based on the timing device than I am about the fact that there was a passenger. At a short track like Laguna Seca the effect is less than at someplace like VIR, but I'd still bet it's a second/lap difference or so. Laguna Seca is a HP/Braking track, and both are very affected by weight in the car. |
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03-22-2016, 10:52 AM | #68 | |
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The GTS is going to give it a good battle - the S might be a little down on power - it will be interesting to see.
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03-22-2016, 11:37 AM | #69 | |
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So, I'll take that wager. I think Pobst will put up a time that beats Tomczyk's. It may only be by a tenth, but I think he'll beat it.
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03-22-2016, 12:21 PM | #70 | |
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03-22-2016, 02:06 PM | #71 | ||
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However, comparing times will be difficult (passanger yes/no, conditions, timing equipment, ...) |
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03-22-2016, 04:55 PM | #72 | |||
TIM YOYO
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Good point on the passenger. I keep forgetting that. I'll give you a two beer handicap haha
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