Ok guys, this is long overdue. With technology as it is today, most of us should be able to measure the performance of our cars using an application such as race chrono and taking measurements from GPS and the on-board accelerometers of our cellphones. With all the different brake upgrades we've seen over the years there still hasn't been any performance comparisons, I say now is the time to start trying.
As for how to do it, I can only tell you how I did my test. Using race chrono (it's free btw) I went into settings => other => expert settings => record internal sensors (as I wanted the readings from the internal accelerometers). Then started a new session, placed my phone face up (to get a clean reading from one of the accelerometer channels) right up against the center panel (didn't want it to slide around in that direction) and as soon as I had contact with the GPS satellites I was off
I'll go right ahead and post my measured values from today.
Max deceleration (acc. to cellphone accelerometers): 1.0G
Max deceleration (acc. to GPS data): 1.2G
Front calipers: '85 corvette calipers (single-piston, diameter 54mm)
Front rotors: '88 corvette standard duty (12" x 0,81")
Rear calipers: '85 Fiero (single-piston, diameter 48mm)
Rear rotors: '85 fiero
Master cylinder: '85 fiero (1" diameter)
Bias adjustment: none (prop-valve disabled)
Wheels: 17x7 on all corners
Tires: Goodyear Eagle NCT 5, 215/50R17. Treadwear 240
Road: medium-rough asphalt pavement
Weather: sunny, warm
Notes: Fronts seem to lock up first. Accelerometer readings could be affected by nose-dive. Braking was from 72kph (speed limited by surroundings). GPS accuracy is not good enough, external bluetooth puck would be a useful addition.