Hi guys as above i would like more power, not massive amounts 220bhp would be great-for now
I dont want to go full zetec turbo yet, TBH i think my spec should be able to get more power then it currently is (186bhp 196lbft @15psi)

The spec is:

-1.8ZVH, standard bottom end, decompression plate
-Kent cvh35 cam, solid lifters and valve springs (could the valve springs/lifters be a issue?)
-Beige injectors
-stage two t3, 55trim 2wd cossie with .36 rsturbo ex housing, 360degree bearings
-stage 2 60mm FMIC
-Motorsport developments chip
-Magnex exhaust system
-Green Air filter
-Sytec fuel pump
-15psi
-LSD stage 1 box, vibratechnics etc

Surely that spec should piss 200bhp?
Any ideas without messing about with the bottom end would be much appreciated.