thats what they call this:
It accurately measures most aspects of your cars performance including acceleration, power output and grip. The meters use precision accelerometers and so need no installation or connections to the vehicle whatsoever.
from Race Technology
for more info, check out:
http://www.race-technology.com/WebPage/Products/Accelerometer/PerformanceMeterIntro.html
"just so you know"
It accurately measures most aspects of your cars performance including acceleration, power output and grip. The meters use precision accelerometers and so need no installation or connections to the vehicle whatsoever.
from Race Technology
for more info, check out:
http://www.race-technology.com/WebPage/Products/Accelerometer/PerformanceMeterIntro.html
"just so you know"