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Old 03-13-2009, 08:47 PM   #1
maxgs
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MSR-H L. Meyers vs. MaxGs Data Acquisition

Folks,
I've had a few racers and hard core track day guys ask to see a comparison of Larry Meyer's lap data versus mine at MSR-H. Below are three graphs that help to illustrate the difference between a noob rider like myself and an expert like Larry.

Comparing MPH. This data set compares Larry's speed to my speed at every point on the track. Larry's lap was a 1:45.7 and mine was a 1:48.4. Note Larry's much higher terminal velocity at the end of each straight. Corner entry speeds are, quite often, comparable as is the speed at the apex. Larry's magic appears to be getting out of the corner very quickly and sustaining that speed until his braking reference.

His technique coming out of turn 2 is quite remarkable. From the exit of turn 2 through gut check his velocity is 12 mph higher (99 mph to 87 mph). Our brake point for the launch is virtually identical, however he brakes, pauses, and then brakes harder.

Coming out of the keyhole and into the bus stop, he is able to accelerate very quickly, getting an initial jump right after turn in and hold the 8 mph advantage to the brake point.

Off the back straight, Larry's speed peaks at 145 mph where mine peaks at 138 mph. Larry begins braking 10 feet after I do, at which point I'm actually carrying a touch more speed to diamond's edge.

Going into the carousel, Larry's speed peaks at about 146 mph where mine peaks at 133. Larry brakes about 20 feet later than I do, but then carries more speed into the entry of the carousel.

MaxGs Larry MPH

Lateral G's are interesting to see as well. This would show if Larry is pulling more G's in the turns. As you can see, the difference is negligible for the most part.

MaxGs Larry Lat Gs

And, lastly, looking at longitudinal G's or braking/acceleration g's is quite interesting. Look at his braking. Going into turn 1, diamonds edge, and the carousel my peak braking is around -.75 g's. Larry's, however, often exceeds -1.0 G's and gets as high as -1.13.

MaxGs Larry Long Gs

And, btw, remember my bike is sprung for a 300 rider. That makes a very difficult ride for Larry and he was avoiding putting my bike at risk. Imagine what the data looks like from his race bike....
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Old 03-13-2009, 08:53 PM   #2
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That is really cool to see the overlays like that.

And you are one fast
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Old 03-13-2009, 08:56 PM   #3
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It's great to be able to see a bit of how Larry, Tye, Mr. Whoopie, Alonzo and all the other fast guys do it.
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Old 03-13-2009, 09:26 PM   #4
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You are fast.
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Old 03-13-2009, 09:32 PM   #5
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Quote:
a noob rider like myself and an expert like Larry.
dude,something on that statement is NOT true.
either youre not a noob or larry was riding on 2 flats.
thats not even 3 secs off of his time,thats freaking smoking.......

what kindda green have you got invested on this data aquisition set-up.
thats bad ...
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Old 03-13-2009, 10:00 PM   #6
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max, you are no noob!
that is some great info, but i thought i heard larry can run mid 1:30's out there.

and i thought i was flying hitting 136 mph on the back straight
fastest time i've got recorded is 1:52, although i'm prtty sure i've had a few faster laps than that, but the lap timers weren't working. wish i could see how pathetic my lines and braking points must look. hehe
c ya on teh 29th
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Old 03-13-2009, 10:03 PM   #7
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Wow! Really interesting and amazing software.
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Old 03-13-2009, 10:29 PM   #8
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The data acquisition setup is about $950.00
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Old 03-13-2009, 10:30 PM   #9
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The software also does theoretical fast lap times. In just 5 laps, where Larry was blocked up in traffic, his theoretical fast lap was 1:44.0. Mine was 1.46.0. My fast lap ever at MSR-H is a 1:45.0.
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Old 03-13-2009, 10:32 PM   #10
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Quote:
Originally Posted by maxgs View Post
Folks,
I've had a few racers and hard core track day guys ask to see a comparison of Larry Meyer's lap data versus mine at MSR-H.
Thank you, that is really really interesting and even though I have no track days under my belt, it's always interesting to see how a race looks like from a math/physics point of view.

Would you mind talking a bit about your setup? I see you're using Racepack's DataLink II. What data recorder do you use?
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Old 03-13-2009, 10:37 PM   #11
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..
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Old 03-13-2009, 10:51 PM   #12
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Old 03-13-2009, 10:53 PM   #13
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Quote:
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The system is RacePak G2X. It consists of a reasonably sized display and a data collection unit.
That is some seriously, wickedly cool stuff. Thanks!
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Old 03-14-2009, 06:24 AM   #14
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Yep, spend some time watching the fast guys on corner entry, and you'll learn very quickly, you have some work to do! Depends on the corner your watching at, but when they are backing it in, and then just chunking the bike into the corner. It becomes obvious to me, I can do more with my corner entry skills. Its absolutely killer to watch! I watched Ty, Dane, and Larry all day into corner 6 at Eagles Canyon last year. You'll know you've got a LONG WAY to go with your riding skills after witnessing that! (you'll need great big too) Outside of the top 3 to 5 riders, no one was getting in the corner like these guys were. I believe setting them apart.

Nice toy Curt..
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Old 03-14-2009, 09:05 AM   #15
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Indeed, very interesting comparo. This data was taken when Larry used your 1k? or was he riding his own bike?
It seems to me that he was doing TD times not race times, I think we could run 30's at MSR-H.
Nonetheless you are fast compared with me.
Thanks a lot for Sharing.
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Old 03-14-2009, 09:12 AM   #16
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Quote:
Originally Posted by ileono918 View Post
Indeed, very interesting comparo. This data was taken when Larry used your 1k? or was he riding his own bike?
It seems to me that he was doing TD times not race times, I think we could run 30's at MSR-H.
Nonetheless you are fast compared with me.
Thanks a lot for Sharing.
Larry was riding my bike. At about half my weight, the bike must have been terrible for him and he was "taking it easy" too. I'd love to put the data acquisition on one of his bikes. That would be amazing.
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Old 03-14-2009, 09:12 AM   #17
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Quote:
Originally Posted by maxgs View Post
And, btw, remember my bike is sprung for a 300 rider. That makes a very difficult ride for Larry and he was avoiding putting my bike at risk. Imagine what the data looks like from his race bike....
Sounds like he was using Maxgs' bike on a trackday that wasn't sprung for him and not trying to break\crash it. Which to me makes it more impressive since he was out there on a new to him bike and still putting those numbers down.

Edit- ^ doh, what he said

Last edited by GrayJ; 03-14-2009 at 09:14 AM.
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Old 03-14-2009, 02:32 PM   #18
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Amazing. Wish I was smart enough to interpret all that. I need more top speed or I will surely wreck.

129mph was my top speed on my personal best lap.
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Old 03-14-2009, 02:39 PM   #19
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Old 03-14-2009, 02:42 PM   #20
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Quote:
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me 2 ..but i did get the part of 2.50 x 20 laps = 50.0
And I like the theoretical stuff. While it is near impossible to put a perfect lap together....at least you know what you WOULD run, if you could.
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