|08-04-2008 05:48 AM|
|08-02-2008 09:19 PM|
Just saw something on "junkyard wars" the other day, it was a metal contraption that incorporated a bathroom scale to weigh the vehicle.
They looked like a factory made device, but then again, you have to consider the source.
|08-02-2008 01:09 AM|
|08-01-2008 11:57 PM|
And the checkered flag goes to...
Although the question was how to use bathroom scales at home, This is the way us backwoods dirt track boys set our cars up. In case you've never raced small dirt tracks, the expense is high and the payout is low so running down with $20 to the local scale just to see how many lbs.you've shaved off your total weight can get expensive over a season. and as for taking the 12 pack with $20?
I DON'T THINK SO!!!! Thats for starting the celebration after the race, when your tearing down your engine for inspection because some rich punk with a shiny car got butthurt when your beatup junkyard dog lapped him twice in a 50 lap feature. LOL
|08-01-2008 06:56 PM|
Don't want to argue but the original question was how to weigh a car 'at home'. The bathroom scale system does that. And deflection of the board has zero impact on the result as long as the middle of the board does not touch the floor. Link between the tire and scale can go between California and New York and back as long as it is, a) carrying the weight of the wheel and, b) transfers the weight to the scale. Shape of the member between those two points is immaterial to the result. Granted the accuracy is not the best with the cheapie scale but again, the criteria was 'at home'. In fact I have used the method many times to size out coil springs for MII front end conversions and it works great. Wouldn't want to sell gold bullion using it but for car work it gets you in the ball park.
I am cheaper than the rest of you. If the car is drivable, I throw in a few old newspapers, go to my recycling center, get the car weighed, toss out the newspapers, get the car re-weighed, take my $0.17 check for the paper and a free, pretty accurate weight slip. Such a deal!
|08-01-2008 06:45 PM|
Yep, I ran my truck down the road to a scale, $10 or something like that and I had it.
|08-01-2008 06:13 PM|
I am a scale tech by trade and specialize in vehicle scales. The bathroom scale scenario is a joke. Bathroom scales in general are crap. Placing a board between a couple bathroom scales is a bad idea. First the scales..they never work right..second the board in between or "weighbridge" is going to have some deflection..in this case probably alot of deflection.
Deflection in a vehicle scale is a very bad thing. You can take your vehicle to a truck scale to get your weight..I would recommend a CAT scale only because I have installed a few and most CAt scales consist of 3 seperate weigh decks that will sum into a gross weight but if you position the car so that the front axle is on deck 1 and the rear axle is on deck 2 this will give you front and rear loads and gross. Keep in mind that you will be getting a weight that is rounded up or down to the nearest 20 lb increment. Also, even though truck scales are regulated by the county they are in and calibrated usually every 90 days this does not gaurantee that there is not an error in the scale. If you want to get a solid weight down to the lb. you really need to buy or find someone that can rent you racing scales or sometimes called wheel weighers. These , if calibrated properly, will get you a solid weight and should put you within a couple pounds accurately. I say calibrated properly because even the scales we purchased that were factory calibrated were off round 2-4 lbs at each wheel. When your weighing race cars this is not good. Make sure the scales and vehicle are level. We just did a new electric vehicle that is going through testing for production and this is the way to go. A weigh ticket at a truck scale will run about 8-15 dollars depending where you go.
Please no bathroom scales
|09-06-2007 04:15 PM|
|Notorious||Any scrap yard will weigh it for you for free. If you know or can befriend any local oval track racers, they can check it by individual wheel (corner) weight and maybe they'll even help you balance it out. This will go a long way towards optimizing handling. You would be amazed at how much weight is transfered, and to where, by little changes in spring pre-load at any given corner of the car. Do this while sitting in the car or put weight equal to yours in the seat.|
|09-06-2007 03:37 PM|
but I feel like an idiot cause that link didn't work.....whoops
|09-06-2007 12:34 PM|
4 pieces of copy paper and an accurate tire pressure guage. Cheapest easiest way. (no, I haven't sniffed too much nitrous)
On a flat surface, slide a sheet of paper behind, in front of and on both sides of a tire. Measure the distance front/aft & side to side. Multiply width by length, for total square inches of tire footprint. Check tire pressure. Multiply psi x the square inches. Do the same for the remaining tires. Add thewm together. and you have your weight.
I was within 8# on a 2700# race car, and a 3100# 65 chevelle.
Slide the paper in until it stops, and keep them parallel /square.
Fire suit on, blaze away!
|09-06-2007 08:07 AM|
|09-05-2007 12:53 PM|
|bentwings||Don't laugh at the board method at the front of the thread. I too am a mech eng and did exactly the same thing. I even weighed myself ( no lightweight) and it was very close. No only that it was cheap. I think I paid about 15 bucks for the scale and the wood.|
|08-28-2007 08:49 AM|
dinger, what county is he in...my link lists all licensed scales by county....
curious if he did look on the link map and found one close by....
cause....he ain't been around for awhile
|08-28-2007 08:34 AM|
[QUOTE=red65mustang]have no idea where "North Fork" CA is but fair to good chance this link will help find one
He's in the foothills N.E. of Fresno, pretty well isolated. Beautiful country. Let us know how the bathroom scales work out. Dan
|08-27-2007 10:25 PM|
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