Car seems to be down on power, where to start looking?

[alkemyst]

I have new plugs (NGK Vpower), wires, injectors (stock 270cc), fuel filter, exhaust and hi flow cat, header, did the 248/232 cam swap (248 is +2.5 adv), injen intake.

Car doesn't seem like it wants to launch hard...anything I can look at for the 'tune'.

Timing is at 20BTDC. I have a OBDII reader that can check O2 volts, temps, etc.

The clutch doesn't seem to be slipping.

I am curious to the O2 sensors...my MPG (mostly city about 5 miles back and forth to work) is only 16-18MPG.

Here is a data dump.

Calculated Load: 24.7%
Coolant Temp: 171F
Short Term Fuel Trim B1: -5.65%
Long Term Fuel Trim B1: 2.3%
Manifold Pressure: 9.8 inHg
Engine RPM: 1000 (788 without A/C on)
Ignition Advance: 20deg
Intake Air Temp: 117F
Air Flow: 0.7 lb/m
O2 B1,S1: 60-800 mV
O2 B1,S1(Fuel Trim): -3 to -7 %
O2 B1,S2: 680-740 mV
O2 B1,S2(Fuel Trim): 99.2%

Thanks

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