I installed some used crower stage 3's in my 12.5:1 comp ls/vtec and I don't have a lope or erradic idle and they made less power than my CTR's. they are stamped the correct part number, could they be worn? they worked really well in a fairly stock b16a... I've checked the cam timing 4 times, checked valve lash, played with the cam gears... I'm stumped, the CTR's are going back in. Has anybody had this problem with crowers?