Hey guys! I just blew my D16Z6. So I want to boost a D15b7 with the Z6 head. The cars running but it wont rev past 6000rpms beacuse it starts backfiring. Is this timing problems? I used the Z6 timing belt and head gasket. TDC mark and CAM gear miss align a little. Should I just play with my cam gear and make it correct?? OR What else could it be?? Thanks in advance!