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Author Topic:   Question about the home made scales in the Toolbox
Champ2x36
Dirt Full Roller

Total posts: 29
posted July 29, 2005 12:33 PM  
In the materials list for the scales there is a piece of 1/8" x 10" x10" for the wheel pads. There is a piece of 1/8" x 8" long to weld to the bottom of the scale pads to center in the angle iron going across. There is also listed a piece of 1/8" x 6" long piece. I don't see where that goes listed or shown in the pics. Where does the 6" long piece go? I'm planning on building a "thunder car" for my wife to run, and would like to build these scales, our budget sure doesn't allow for buying a digital set!!

Thanks,
Ed

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When the drops the stops!!

My website: www.geocities.com/champ2x36

DangerZoneRacing
Dirt Maniac

Total posts: 176
posted July 29, 2005 01:13 PM  
I have built those scales and I didnt see a need for that peice of steel. Jay116 gave me some info on those scales. heres a link to his website and those scales in use on his car. http://www.rcracing-team.com/scales.htm Mine are pretty close to being accurate, they show heavy anywhere from 20-28 pds. If you only use those scales, use them in the same spot on the garage floor and the same scale for each wheel. I marked the floor in my garage where they sit and have mark each frame, pad and scale for which wheel it is used. that way it should be pretty close to being the same all the time. good luck.

sideways
Dirt Forum Champ
Total posts: 715
posted July 31, 2005 08:08 PM  
That peice of steel goes under the angle that rests on the scale for a more even weight distribution.Bath scales were for 2 feet and this helps even the accuraccy.Even when we used bath scales for go-karts we used a 3/4 press wood cut to fit the scales made them more repeatable.That ones like you buy from Madone have a large peice of steel for there rollers to set on.

DangerZoneRacing
Dirt Maniac

Total posts: 176
posted July 31, 2005 08:24 PM  
Ok....I understand that. But on mine I had to put two 1/2" washers (duct taped to scale) on either edge of the scale where the angle peice rests, because the angle would put to much pressure on the center of the scale and would not let it turn. Would not get a accurate reading cause the scale wouldnt spin freely...it would stick. Now the angle peices put pressure on these washers and moves freely....and it doesnt change the scale reading cuz those two itty bitty washers dont weight enuff. Get the picture? lol.

sideways
Dirt Forum Champ
Total posts: 715
posted July 31, 2005 08:31 PM  
Yep same deal.lol
quote:
Originally posted by DangerZoneRacing:
Ok....I understand that. But on mine I had to put two 1/2" washers (duct taped to scale) on either edge of the scale where the angle peice rests, because the angle would put to much pressure on the center of the scale and would not let it turn. Would not get a accurate reading cause the scale wouldnt spin freely...it would stick. Now the angle peices put pressure on these washers and moves freely....and it doesnt change the scale reading cuz those two itty bitty washers dont weight enuff. Get the picture? lol.


hanson
Dirt Newbie

Total posts: 3
posted August 01, 2005 09:33 AM  
I'm thibking of biulding a set . my question is how do you get the front wheels on the scales? if you jacked the front up would not the front wheels put side pressure on the scales as they come down?

sc1 racing
Dirt Freak

Total posts: 419
posted August 01, 2005 10:31 AM  
thats the reason you bounce the car to get it settled down.

sideways
Dirt Forum Champ
Total posts: 715
posted August 01, 2005 01:19 PM  
You could substitute rollers for where the angle iron is,were it goes on the floor and on the scale for the front ones.

Champ2x36
Dirt Full Roller

Total posts: 29
posted August 08, 2005 10:16 AM  
Thanks guys,

I suspected that the extra piece was for across the scales, but in the toolbox plans there was no explanation of that.

Ed

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When the drops the stops!!

My website: www.geocities.com/champ2x36

zeroracing
Dirt Forum Champ
Total posts: 1875
posted August 11, 2005 09:01 PM  
How repeatable are these? I mean if you scale your car time after time, are you getting the same results every time? How close are your results when you scale them over and over. I mean could a scale my car with them one time and get 125 lr bite, and not change anything and put the scales back in the same spot(on the floor) and get the same 125 lr bite, or does it kinda float around a bit? As long as they are easy to repeat then i dont see any problems with useing them.

jay116
Dirt Freak

Total posts: 428
posted August 12, 2005 10:13 PM  
Like you said if you use the same beam and scale on the same wheel every time you will find them very repeatable. I found that the better a bathroom scale you use the better. We bought 5 dollar scales and if the car stayed on for a long time they settled and the results get flawed. But even then the percents were still right just overall weight showed heavy.

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Jason Boivin
http://www.rcracing-team.com

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