hey guys i took apart my old motor and i have a few buyers for my rotors but they want to know the weight and the compression of them... Ive serached but not luck... well i looked at the rotors and on the side of them it has the letter S on all 3 sides/angles of the rotor...

 

you can match compression based on the year of the car. I believe this is in the FAQ at the beginning on the 2nd gen section.

 

k ill check the motor was s4 87

 

well i found out from there that the ration is 9.4:1 now i just need the weight

 

don't you have a scale at your house? </sarcasm>
i think the weight can be found in the shop manual, which you can download from one of those FAQ threads.