what's there to fuss about.. he has the papers to prove it.
Other than that, now we all need to make it drop to 2500 at least!!

 

That's +/- 80 lb.

I would expect an S2k minus the spare and toolkit (surely no more than 40 lb.) with a full tank of fuel (~80 lb.) to weigh ~2790 lb based on published "as-tested" AP1 weights and what my own AP1 weighed in at at the track scales.

The minimum displayed weight increment does not tell you what the actual resolution is.

Just pointing out that truck scales for weighing tractor trailers is not *necessarily* going to give you accurate weight (within a reasonable tolerance, say +/- 5 lb.) for a ~2800 lb. car.

2740 lb. for your car wouldn't totally surprise me, but I'd have more *confidence* in that number if it came from scales designed for and calibrated for weighing things more in the 5000 lb. range than in the 80,000 lb. range.

 

i was a licensed scalemaster for over 10 years. as per state law, we had to have the scaled recertified every few years. i was 198lbs at the time, and it always read 200 when i was on the scales, no matter where i was, and we had 2 70' scales. ours read in 20lb increments, and you can set it for whatever you want. if you went with less, wind had a major effect on the scales, and it would never settle down.

 

very good info, thanks rodney!

 

This in no way proves accuracy/reliability of truck scales at a 200 lb. load.

Again, I'm not saying I think the 2740 lb. reading is *wrong*, only that scales for measuring 80,000 lb. weight are going to have a greater +/- range of error.

Nominally, the average error will be zero, but the RANGE of possible error on a 18-wheeler truck scale is going to be on the order of 10 times greater than the error (in the same units of weight) on a car scale. If a car scale may be off by pounds, a truck scale may be off by tens of pounds.

 

not for nothing, my ap2 with full tank of gas and a full system-amp,sub, etc minus the spare weighted 2800 on the scale at the race track.

 

My '01 must be unusually heavy...

 

Dan if you read my earlier post the buddy of mine that had his car weighed was on corner balance scales and not on a truck scale and it came in at 2714 so i would say that the truck scales are pretty damn close now if you all would like to continue this discusion start your own damn thread and stop jacking this one

And if you car does weigh more than this, then yes your car is unusually heavy.

Thanks for the post Turbosix the proof is in the writing, dont know whats so hard to understand there.

 

Just an FYI on S2k weights, with the same wheels/tires, fluid levels, exhaust, and an account for soft top, rear window, a/c ... all S2000 will be roughly the same weight. Early S2000s don't magically weigh less. The difference in wheels/tires, exhaust and rear window prove this. You also need to do the comparisons on the same scales, same time, etc. No different than comparing dyno charts. I have done this numerous times for stock class auto-x purposes.

I would find another S2000 owner to go with you next time. For proper comparison, make note of any changes and top that fuel tank off. Don't just speculate and assume all scales are equal. I have seen large variances. Your AP1 isn't unusually heavy unless there is something unaccounted for. That type of talk is nonsense and without a factual base. Multiple S2000s, same scale, same day or its not worth worrying about.

-Marc

 

Nice keep us updated