mr2fast2thao

i try searching it but im not 100% sure so im asking u guys...ever since i drop my car ive been gettin this grinding noise whenever i floor my car (no grinding if driving normally). i didnt really care about it until now cus my friends bro keep talkin shit about his EG hatchback takin on any car especially my car. i know if i floor it then the grinding noise will come up. it really sounds like its coming from the axles. all i did to the suspension was drop it with teins coilovers and change the stock rotors to drill/slot. so any ideas, i would like to take on my friends bros EG.