ca's are fine, its just some of the older electronics that give the motor a bad name. hell, i wouldn't mind having one, stupid nissan and their rocker arms. real motors have direct acting valve trains, like the ca,ka,rb, ALL TOYOTA TWN CAM ENGINES!!!! in my mind the SR is still a weak motor and i treat it as such. easy until it warms up, no bouncing off the rev limiter. if it was a 3sgte i could beat the piss out of it and not care cause it wouln't break. i say your fine with the CA, just get some springs and cams and rev out to 8k or more.