Power to weight ratio - what figure to use
Discussion
I was looking at calculating the power to weight ratio of the car after the various mods I have had done to the car basing the weight of the car on the kerb weight as stated in the manual, about 1677kg from memory.
My question is this. On the registration document the weight is showing as over 1700kg. So where does the figure on the V5 come from 'cause it's not the kerb weight as stated in the manual?
Got me thinking about why the descrepency between what Holden say in the manual and what is printed on the reg document
My question is this. On the registration document the weight is showing as over 1700kg. So where does the figure on the V5 come from 'cause it's not the kerb weight as stated in the manual?
Got me thinking about why the descrepency between what Holden say in the manual and what is printed on the reg document
you could just weigh the car...
"To weigh a car, take two sheets of paper, a ruler, and a tire gauge to a smooth, hard-surface parking lot. Find the car you want to weigh. Slide one sheet of paper under the front of a tire as far as it will go. Slide the other sheet under the back of that tire as far as it will go. Be sure the two sheets are straight. Then measure in inches this length of the tire’s “footprint”. Slide a sheet of paper under the outside of the tire as far as it will go. Slide the other sheet under the inside as far as it will go. Be sure the papers are parallel (straight). Measure this width (distance between the sheets) of the tire’s “footprint” in inches.
Multiply these two measurements to find the area of that tire’s “footprint” in square inches. Then press a tire gauge on the valve stem to find the air pressure inside the tire in pounds per square inch. If you need help, ask your teacher or another adult who has taken tire pressure before.
When you know the air pressure inside one tire, and the area of its “footprint,” you should draw a rectangle the size of that tire’s footprint. Mark this area into square inches. On each square write the pressure inside that tire. When you add up those PSIs (pounds-per-square-inch), that is how much that tire is holding up. Do this same thing for each of the other tires. When you add up all four tires’ hold-up force, that is the weight of the car!"
Enjoy....
ps - i've no idea if that works or how accurate it is.... but it's the first thing google found.... Good Luck!!
"To weigh a car, take two sheets of paper, a ruler, and a tire gauge to a smooth, hard-surface parking lot. Find the car you want to weigh. Slide one sheet of paper under the front of a tire as far as it will go. Slide the other sheet under the back of that tire as far as it will go. Be sure the two sheets are straight. Then measure in inches this length of the tire’s “footprint”. Slide a sheet of paper under the outside of the tire as far as it will go. Slide the other sheet under the inside as far as it will go. Be sure the papers are parallel (straight). Measure this width (distance between the sheets) of the tire’s “footprint” in inches.
Multiply these two measurements to find the area of that tire’s “footprint” in square inches. Then press a tire gauge on the valve stem to find the air pressure inside the tire in pounds per square inch. If you need help, ask your teacher or another adult who has taken tire pressure before.
When you know the air pressure inside one tire, and the area of its “footprint,” you should draw a rectangle the size of that tire’s footprint. Mark this area into square inches. On each square write the pressure inside that tire. When you add up those PSIs (pounds-per-square-inch), that is how much that tire is holding up. Do this same thing for each of the other tires. When you add up all four tires’ hold-up force, that is the weight of the car!"
Enjoy....
ps - i've no idea if that works or how accurate it is.... but it's the first thing google found.... Good Luck!!
crisisjez said:
How do you manage on your own without a Teacher or an Adult present?
Probably why all the race teams use digital scales
Probably why all the race teams use digital scales
i've just tried it on my Mountain Bike.... apparently it's 72lb/33kg....
Shirley that can't be right?
i'd try it with the car, but it's raining so my paper would get wet....
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