Post exact weights of weight reduction you have done!
I did a Garrett core rated at 550HP that weighs 13 pounds, complete with piping. It's in my build thread. 22x10x2.3" core so lots of frontal area but thin, which keeps thermal efficiency high and minimizes airflow interruption to the radiator. No idea how well it's going to work. Compared to stock, it's got a little more frontal area, and the flow tubes are much larger.
And yes, just because they are corning balance scales doesnt automatically make them accurate.
But long as you take care of them properly and calibrate them regularly, they are a lot more accurate then truck scales. Over 50% of truck scale weights that I have seen checked on real scales are inaccurate by 50-200lbs.
i work in and out of quarry's every day. AFAIK or am told the scales are calibrated every morning. you have to remember there using them to sell there product.
they only work in 20lb increments.
they only work in 20lb increments.
I explained the EXACT issue. Doesn't matter if that scale is calibrated daily if you are below the usable range. There are PHYSICAL limitations to load cells and limitations of the electrical components measuring the load cell at low levels due to electrical noise. If you are below 10% of the full scale reading, the reading will not be accurate. There are ways to try and improve low end measurements, but it's all estimates at that point and will not be a certifiable value.
I agree with corner scales being much more likely to be accurate though simply because of the range they are designed to work in. Load cells are typically rated as a % of full scale when it comes to accuracy. If the cell can only handle 1500 pounds, then 1% is +/- 15 pounds. 1% is a fairly inaccurate load cell. A quality one will be in the 0.05% range. 0.05% on 100,000 pound truck scale though is still +/- 50 lb and below 10,000 lb can't be trusted anyway.
Then again, all the load cells I've calibrated and messed with required you to cycle them full scale before using them anyway or the measurement could easily be wrong. I'm talking high end load cells here too...
I agree with corner scales being much more likely to be accurate though simply because of the range they are designed to work in. Load cells are typically rated as a % of full scale when it comes to accuracy. If the cell can only handle 1500 pounds, then 1% is +/- 15 pounds. 1% is a fairly inaccurate load cell. A quality one will be in the 0.05% range. 0.05% on 100,000 pound truck scale though is still +/- 50 lb and below 10,000 lb can't be trusted anyway.
Then again, all the load cells I've calibrated and messed with required you to cycle them full scale before using them anyway or the measurement could easily be wrong. I'm talking high end load cells here too...
I explained the EXACT issue. Doesn't matter if that scale is calibrated daily if you are below the usable range. There are PHYSICAL limitations to load cells and limitations of the electrical components measuring the load cell at low levels due to electrical noise. If you are below 10% of the full scale reading, the reading will not be accurate. There are ways to try and improve low end measurements, but it's all estimates at that point and will not be a certifiable value.
I agree with corner scales being much more likely to be accurate though simply because of the range they are designed to work in. Load cells are typically rated as a % of full scale when it comes to accuracy. If the cell can only handle 1500 pounds, then 1% is +/- 15 pounds. 1% is a fairly inaccurate load cell. A quality one will be in the 0.05% range. 0.05% on 100,000 pound truck scale though is still +/- 50 lb and below 10,000 lb can't be trusted anyway.
Then again, all the load cells I've calibrated and messed with required you to cycle them full scale before using them anyway or the measurement could easily be wrong. I'm talking high end load cells here too...
I agree with corner scales being much more likely to be accurate though simply because of the range they are designed to work in. Load cells are typically rated as a % of full scale when it comes to accuracy. If the cell can only handle 1500 pounds, then 1% is +/- 15 pounds. 1% is a fairly inaccurate load cell. A quality one will be in the 0.05% range. 0.05% on 100,000 pound truck scale though is still +/- 50 lb and below 10,000 lb can't be trusted anyway.
Then again, all the load cells I've calibrated and messed with required you to cycle them full scale before using them anyway or the measurement could easily be wrong. I'm talking high end load cells here too...
Besides for personal masturbation or for determining power:weight for classing purposes, is there a point to getting an exact weight on your car? Seems to me the only important thing is the weight:cost or weight:work that each piece takes off.
Last edited by nollij; Feb 14, 2013 at 02:34 PM.
If you think you weight 2830lbs and you actually 2810lbs youll take a penalty in SCCA SM.. or if you're actually 2850 then you have another 30lbs of potential to remove.
rice or weight:work that each piece takes off.
Since I had the brake booster off my car recently, I threw it on the digital shipping scale... it's friggin' heavy! 8.18 pounds. Sorry, I forgot to weigh the MC while it was apart.
For the record, this is Mitsubishi part #MR569145 (also a Dodge/Mopar/Jeep part, from what I can tell) and has a silver decal with ID #864-03509.
For the record, this is Mitsubishi part #MR569145 (also a Dodge/Mopar/Jeep part, from what I can tell) and has a silver decal with ID #864-03509.
I am a weight reduction addict. The person who had the scales I used to use, I do not talk to anymore.
I am looking for a good set of corner weighting scales. Any ideas?
I am looking for a good set of corner weighting scales. Any ideas?
