Lightened Flywheel, 12lb or 9lb

it's not always the lighter the better. since i dont know how to explain well. but i know that for civics, lighter flywheel addes more hp but will lose some torque becuz hp and torque are relatively related(i read this article from hondalife.com and the author had an equation showing that how torque and hp are related). lightened flywheels are definitely good for big torque cars such as mustangs. but for civic---no lighter than 9lbs(i believe it's 9lbs not 10lbs)

i dont know how much the stock one weights.

my friend once wanted to put a 8lbs flywheel in his 98 hx, but the motorshop mechanic told him not too becuz the car will lose torque, and to civics, this is a big issue since we dont have much torque and we cant afford to lose more.

uh, probe man, i m not wrong about this. i might not know how other cars work, but i definitely know something about what i m driving!