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TJ Koyen
Joined: 03 Oct 2004
Posts: 1425
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 Posted: Wed Aug 08, 2012 3:33 pm Post subject: |
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| Justin Martin wrote: | Awesome thanks guys!
Im only 5'6.5" 135 (on a good day, but avg 130). Should be racing Rotax Sr on an Intrepid Cruiser. So I should have plenty of room for messing with weights.
I'll start with 41%!
Thanks for your input![/b] |
I'm about 5'7", 120lbs and we've found that a higher front weight works better for us to get the kart to turn, so we usually shoot for 43-43.5. We've had a hard time getting the kart to work at anything lower than that, FWIW.
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joseph hollinger
Joined: 12 Sep 2002
Posts: 9485
Location: United States, California, san francisco
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| Posted: Wed Aug 08, 2012 3:48 pm Post subject: |
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| Jim McMahon wrote: | | Joe can you post a link to those scales for reference? |
They are Fairbanks Ultegra scales. Pretty expensive new, but I bought these on Ebay, one at a time and the total cost was under $300 or so.
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Justin Martin
Joined: 27 Mar 2012
Posts: 328
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| Posted: Wed Aug 08, 2012 5:04 pm Post subject: |
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| TJ Koyen wrote: | | Justin Martin wrote: | Awesome thanks guys!
Im only 5'6.5" 135 (on a good day, but avg 130). Should be racing Rotax Sr on an Intrepid Cruiser. So I should have plenty of room for messing with weights.
I'll start with 41%!
Thanks for your input![/b] |
I'm about 5'7", 120lbs and we've found that a higher front weight works better for us to get the kart to turn, so we usually shoot for 43-43.5. We've had a hard time getting the kart to work at anything lower than that, FWIW. |
Thanks a bunch! That means a lot considering we sound like approx the same size. |
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Chris Reinhardt
Joined: 29 Aug 2002
Posts: 2933
Location: United States, New York, Ossining
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| Posted: Wed Aug 08, 2012 6:07 pm Post subject: |
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Joe, here's something to look into, Bluetooth serial connections. Maybe even write a Android app for your scales....
PS I saw Intercomp has these bad ass wireless scales that run off an app on the PC. No control box, no wires, just pads, that's it....
CR
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Mike Goebel
Joined: 28 Jul 2001
Posts: 5766
Location: United States, California, Winnetka
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| Posted: Wed Aug 08, 2012 6:35 pm Post subject: |
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When ever I see someone ask about scaling a kart I have to ask do any of the top Euros scale their karts? I'll have to ask at the next SuperNats.
Mike G.
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joseph hollinger
Joined: 12 Sep 2002
Posts: 9485
Location: United States, California, san francisco
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| Posted: Wed Aug 08, 2012 6:57 pm Post subject: |
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Well even if the answer is no, that doesn't mean that they wouldn't be faster if they did. If you have to run ballast, there's no point in not putting it in the most optimal location. That's the situation I'm in. Last year, I didn't need ballast, this year I need twenty pounds to make weight.
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Justin Martin
Joined: 27 Mar 2012
Posts: 328
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| Posted: Wed Aug 08, 2012 6:57 pm Post subject: |
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| Mike, I believe they do. When the kart is initially set up. But after that the kart only gets about 6 races on it or so, from what I hear. So I doubt they worry about it much after the initial |
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joseph hollinger
Joined: 12 Sep 2002
Posts: 9485
Location: United States, California, san francisco
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| Posted: Wed Aug 08, 2012 7:10 pm Post subject: |
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| Chris Reinhardt wrote: | Joe, here's something to look into, Bluetooth serial connections. Maybe even write a Android app for your scales....
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I like the Bluetooth, but I've already done my app in Windows and MacOs. There's only so much time I can sanely devote to this project  Besides, I have to say that I really like the result I was able to achieve. For about 1/2 the price I'd have to pay for a set of used scales I was able to construct a system that is:
1) more accurate, and
2) includes a countdown timer that allows me to scale the kart without help from anyone--no other scales let you do that.
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Chris Reinhardt
Joined: 29 Aug 2002
Posts: 2933
Location: United States, New York, Ossining
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| Posted: Thu Aug 09, 2012 3:57 am Post subject: |
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| Mike Goebel wrote: | When ever I see someone ask about scaling a kart I have to ask do any of the top Euros scale their karts? I'll have to ask at the next SuperNats.
Mike G. |
A couple of differences.... They put their chassis on a surface plate to make sure they're straight. Not straightening them, but make sure they came out of the jig straight. They bring multiple chassis to each race and choose the best one for that race. The other thing is the driver's ability to feel the chassis. They move the seat around just by driver's feel and lap times. Most of us are not there yet.....
While taking a "slightly" bent chassis and messing with it till scales even, isn't a perfect thing, it's better than not doing it...
CR
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