Measuring unsprung weight?
Thread Starter
Race Director
Joined: Nov 2000
Posts: 16,416
Likes: 1
From: NC,USA
Measuring unsprung weight?
Hey guys...
How do you measure the unsprung weight on a car? Do you have to remove all the components and weigh individually?
Things like the control arms that are bolted to the frame, do they "weigh" their actual weight when attached to the car, in relation to the suspension?
How do you measure the unsprung weight on a car? Do you have to remove all the components and weigh individually?
Things like the control arms that are bolted to the frame, do they "weigh" their actual weight when attached to the car, in relation to the suspension?
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
I've weighed some things on my car which is a '79. Not sure what this will do for you, but it's a little bit of info:
Stock upper control arms: 17lbs for both
Stock lower control arms: 31lbs for both
Tubular VBP upper control arms: 7lbs each
Tubular VBP lower control arms: 16lbs each
Front monospring: 7lbs
Tubular trans crossmember from BTO: 13lbs
Aluminum water pump from Stewart: 6lbs
I still haven't weighed the front coil springs or stock crossmember, but I can do it if you would like those weights.
Stock upper control arms: 17lbs for both
Stock lower control arms: 31lbs for both
Tubular VBP upper control arms: 7lbs each
Tubular VBP lower control arms: 16lbs each
Front monospring: 7lbs
Tubular trans crossmember from BTO: 13lbs
Aluminum water pump from Stewart: 6lbs
I still haven't weighed the front coil springs or stock crossmember, but I can do it if you would like those weights.
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
I think you figure half the weight of the a-arms as unsprung weight. If you took out the spring and reconnect the a-arms, you could raise a scale under the tire to see how much it all weighs. Joe
