Ok, here's what I got: 1993 civic DX coupe 1994 integra b18B block 1993 integra b18a head head, intake manifold, t/b and exhaust manifold port matched and bored thottle body intake manifold off 1994 integra stock cams, basically stock head the bottom end is stock bore with stock crank and rods (1994 integra) pistons are out of a b16a they are P30 pistons according to the compression calculator I have approx 11 to 1 compression with these pistons I don't feel a difference in these from my old stock pistons, also there is poor throttle response and it just feels weird all around. I have not had time to DYNO the car, but I made sure that my timing is 100% correct, set at the middle mark on the pully (so that is whatever stock b18b timing should be I think its 12btdc, but Im not sure) what could be wrong? Changed fuel filter and about to change fuel pump. Have fuel pressure regulator but no fuel pressure guage so I haven't installed it yet. Can anyone help?