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Which MaxQData for autocross?
Last post 05-05-2009, 10:50 AM by KevinDietz. 155 replies.
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 01-25-2007, 11:26 AM |
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mitchman
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Joined on 04-30-2001
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Kennewick, WA
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Posts 413
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Re: Which MaxQData for autocross?
My name's not Andy but.... ;) I use a suction cup to mount mine. That way you can easily move it to other people cars to record their runs and compare them with your own. Here's a really nice suction cup I found via Kevin Deitz: http://cinemasupplies.stores.yahoo.net/liwecarcamoa.html It's great, because you can just look at it to instantly tell if it's lost too much suction. But in my experience the thing will hold for hours without having to pump it up again. The only negative is that the suction cup blocks a little bit of the windshield. Actually, I bought this model: http://cinemasupplies.stores.yahoo.net/gripsuccupca.html I mount a small memory card video camera to it and also attached the MQGPS using a simple piece of bent aluminum held in place with one of the suction cup mounting screws. If you're interested, I can take a picture of it.
1999 Miata 10AE (C-stock)
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| 01-25-2007, 3:35 PM |
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ecugrad97
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Joined on 10-24-2002
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Greenville, NC
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Posts 46
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Points 600
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Re: Which MaxQData for autocross?
Hmmmm, Andy I assume you run yours with the top down, which is what I do for AX, but for HPDE, I'll have to find another solution. Mitch, that camera mount might do the trick!
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| 01-25-2007, 4:12 PM |
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modernbeat
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Joined on 07-01-2004
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Dallas, Texas
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Posts 801
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Re: Which MaxQData for autocross?
The GPS sensor has no problem finding the satelites through the Miata softtop or fiberglass hardtop.
I'd assume a metal surface would squelch the reception.
Aut tace aut loquere meliora silentio.
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| 01-25-2007, 4:22 PM |
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Fastmike
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Joined on 12-16-2001
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Seattle Wa USA
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Posts 1,859
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Re: Which MaxQData for autocross?
I don't know why but it is recommended to mount the antenna on a metal surface to improve reception. I can't remember where I read that but I have the DL1 and it might have been in that documentation.?
FM
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| 01-25-2007, 4:34 PM |
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ecugrad97
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Joined on 10-24-2002
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Greenville, NC
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Posts 46
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Points 600
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Re: Which MaxQData for autocross?
WOOO HOOO that's even easier!
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| 01-25-2007, 4:48 PM |
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Lynn
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Joined on 12-01-2004
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Saint Louis
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Re: Which MaxQData for autocross?
 fastmike:I don't know why but it is recommended to mount the antenna on a metal surface to improve reception. I can't remember where I read that but I have the DL1 and it might have been in that documentation.?
FM
The metal surface functions as a ground plane and will reduce positional errors caused by mutlipath. Multipath is when the GPS signal is reflected to the antenna from a nearby flat surface.
2002 Mercedes C230k, retired, 2005 Nationals STU DFL 1969 Beach Solo Vee and 1985 Lynx B Solo Vee
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| 01-25-2007, 6:29 PM |
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Fastmike
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Joined on 12-16-2001
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Seattle Wa USA
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Re: Which MaxQData for autocross?
Makes sense...I think the recommendation did say the flat metal piece should be at least X inches by X inches. Going off memory, it was something like 4" x 4" which would block what you were saying could happen.
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| 01-25-2007, 7:37 PM |
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MaxQData
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Joined on 12-31-2006
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Seattle, WA
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Posts 30
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Points 155
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Re: Which MaxQData for autocross?
Lynn is correct - the metal surface acts as a ground plane to improve reception. A 4" x 4" plate is all you really need. However, the improved sensitivity of the new MQGPS is such that you will probably never notice the improvement given by the ground plan, so I wouldn't worry about this too much.
GPS signals will go through glass and plastic without much attenuation. Metal will block the signal.
Another acceptable mounting method is to put a small square of Velcro on the top of the MQGPS, then another piece of Velcro on the inside of your front windshield, low down so that it doesn't impede your vision and it can see as much of the sky as possible.
Ed Lansinger MaxQData, LLC Data Acquisition Systems
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| 01-25-2007, 10:57 PM |
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SteveW
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Joined on 01-02-2001
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Redmond, OR
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Re: Which MaxQData for autocross?
MaxQData:
Lynn is correct - the metal surface acts as a ground plane to improve reception. A 4" x 4" plate is all you really need. However, the improved sensitivity of the new MQGPS is such that you will probably never notice the improvement given by the ground plan, so I wouldn't worry about this too much.
GPS signals will go through glass and plastic without much attenuation. Metal will block the signal.
Another acceptable mounting method is to put a small square of Velcro on the top of the MQGPS, then another piece of Velcro on the inside of your front windshield, low down so that it doesn't impede your vision and it can see as much of the sky as possible.
I was thinking in the rear window for a sedan/coupe as long as you can keep a bluetooth connection going at that distance.
Steve W. ACR SRT-4
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| 01-26-2007, 12:03 AM |
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RX7 KLR
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Joined on 01-19-2001
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Coto de Caza, CA
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Posts 1,601
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Re: Which MaxQData for autocross?
SteveW: I was thinking in the rear window for a sedan/coupe as long as you can keep a bluetooth connection going at that distance.
That is where I have mine.
Jason Isley 2005-2006-2007-2008 B Stock National Champion
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| 01-26-2007, 12:31 AM |
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KevinDietz
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Joined on 12-01-2005
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Re: Which MaxQData for autocross?
In a word MAXQDATA will become to solo events as are R-Compound tires and Hi-end shocks in a very short time. (remember I said that)
The system is "Much" easier to use than the DL1 system. It is much simpler to understand and easier to configure for the none computer person. Remember in Solo your never going to run that track again. It doesn't help you to go home and study the data on your laptop because you won't get to put your theory into practice. The MQGPS data is available to you the moment you stop recording, you can pull up the track map and the data in seconds after coming in from your runs even before you unbuckle. You can easily see the difference between your runs or that of your co-drivers runs. The bluetooth gps version is all you'll ever need for solo. Ok here is where people will argue that 5hz aint enough and gosh I need throttle position and rpm in my data. Hogwash, for most people they aren't even getting 100% of what their car can do, so why worry about data to the Nth degree. There is more Data in my MAXQ run than I can squeeze out of it in a week of study. And I do study it, since its so easy to kart around my PocketPC I'm studying the data while I'm waiting for my lunch or bench racing after the events. What matters is, can I, in less than 10min (Between runs) figure out what I need to do to go faster, the answer is yes. This system is so good I wonder sometimes why I tell people about it, its like cheating! and its hard enough to win as it is. ;-P
I have seen this system help people WIN at events, hands down the coolest slickest data logging system on the planet for autocrossing right now.
Top PAX at Nationals is no easy feat, but It helps having the number 8 guy to compare my runs to and just go faster where he is "beating" me on course. :-)) Gotta love the VCR mode!!!
Can you overlay runs and see a two to three foot difference in the "Line"? yes. Are their artifacts and errors in the data, yes, sometimes, but as Andy said you'll get good at seeing what is real and what isn't.
Go buy the system you will not be disappointed. To get its true benefit I would recommend finding a co-driver who is faster than YOU. This system, as with most data logging, really helps the slower guy the most.
Kevin Dietz
TOP PAX 2006 National Championships
2006 CS National Champion winning by the largest margin (per entries) of any class at nationals over 1.1 seconds!
How to make your car faster. 1. Bigger Engine 2. Bigger Tires 3. Bigger Brakes 4. Or just give me the keys!
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| 01-26-2007, 12:53 AM |
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subrew
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Joined on 08-10-2004
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Chico, CA
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Posts 294
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Points 3,780
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Re: Which MaxQData for autocross?
I've had mine up on the front of the dash, and have never had less than 12 sats in view at any given time. I've just got a basic velcro mount for the GPS unit, and I have a basic mount for the PDA so it is visible on track, to help with lap splits. 
FWIW, the system has works great with the GPS unit sitting on the bench seat of my F250, and the PDA in the cupholder. It doesn't seem to be too affected by the cab of the truck.
Chris H.
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| 01-26-2007, 9:21 AM |
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Andy Hollis
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Joined on 05-28-2003
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Re: Which MaxQData for autocross?
KevinDietz: Top PAX at Nationals is no easy feat,
Kevin Dietz
TOP PAX 2006 National Championships
2006 CS National Champion winning by the largest margin (per entries) of any class at nationals over 1.1 seconds!
Still wavin' that flag, eh Kevin?  Gotta love those NW Region guys and their PAX worship.  Kevin is to MAXQDATA as Scotty is to Kumho.  Not that I don't agree that MAXQ is totally cool and usefull...'cuz it is.  And if Ed continues to do the autocross-specific development, it will be even cooler. --Andy
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| 01-26-2007, 10:32 AM |
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Robert Puertas
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Joined on 06-04-2002
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Irvine, CA USA
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Posts 564
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Re: Which MaxQData for autocross?
Ed's coming down to El Toro this weekend to help us out with the new Evo Extreme school. You can't beat that kind of customer service!
Robert Puertas www.EvoSchool.com
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| 01-26-2007, 1:31 PM |
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Fastmike
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Joined on 12-16-2001
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Seattle Wa USA
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Posts 1,859
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Points 26,710
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Re: Which MaxQData for autocross?
I agree with Kevin that the between run thing gives the advantage to MaxQ over DL1. I also thank him for giving me props from Nats. I also agree that this stuff is going to be required..Actually "is" required right now. It is nice being able to "hop-scotch" when you have 2 fast drivers in the same car. Will that work for everyone? No. You have to take the data and know(guess) what to do on the next run but you still have to actually DO what you are supposed to do on the next run. It takes a pretty good driver to be able to do that with one shot at it and still drive around 100%
I still think the "going home and ultra analyzing" is useful though. You learn stuff about the car and yourself by doing that. You can try stuff that you wouldn't normally try at local events and then compare that experiment at home looking at it in different ways and then when you come to similar situations/courses, you can apply the knowledge that you learned from your experiment.
Having Ed at the site is going to be SWEEEET. He is a MASTER of the software and like Andy and other say, is going to make it more autox specific.
FM
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