Trick Flow Top End Kit
Don't be in such a rush to change that C&L mass air flow meter. Sounds like your injectors are too big for that application. I have a 91 Stang 5 speed with the Trick Flow Street kit. 24lb injectors and 4:10 gears. Car ran a 13.02 @ 105.80 last week at Island Dragway in New Jersey on a 85 degree day with the 73mm C&L.
I had a Pro-M mass air meter on the car and the car ran slower. That meter made the car run rich. Too FAT!! Early back in March car ran a 12.71 @ 107.94 with the C&L meter. Much better meter for performance if you ask me.
Lower your fuel pressure to around 35psi, below 38psi. vacumn line off and plugged. Don't forget to put it back on after adjustment. If you have MSD ignition, gap your plugs at .045 and set timing at 14 degrees. I had idle issues too with the C&L and blocked off the idle air control valve. It would surge at a idle and when coming to a stop at a traffic light. This seemed to help alot. Also you can turn the C&L so the meter on the top is closer to the fender. This may help also. The C&L's are alittle frustrating, but believe me, when I changed over to the Pro-M the car was 2 tenths slower and I lost almost 3 mph. Street wise I like the Pro-m better, but performance wise, stick with the C&L.
I put the car on the Dyno and my numbers are close to yours. Max power (run1) 285.49 max torque 320.12. (Run 2) max power 294.87 max torque 329.90 just by lowering fuel air ratio to 35 psi and timing at 14 degrees with Pro-M meter 75 mm. I should have Dyno'd the car with the C & L on it first.
Anyway the numbers at the track don't lie. This Trick Flow application runs great. I just ordered the 3/8 heat spacer for it today as the top intake was very hot at the track and probably kept me from getting back into the high 12's. I am very pleased with this set up. Stage 1 cam and 10:1 Probe pistons. Stock crank and rods.
Your air fuel mixture on the bottom of the chart looks like your are way too rich, 24lb injectors are probably what you need. My air fuel was 11.46 before adjustment and 12.80 after, Still out of range but on a Dyno they won't be exact as they would be going down the track.
You will have too either Dyno the car again or take it too the track and see what times you run before and after the changes..:Track:
Good Luck,
Ken BLK3DGT (12.71 107.94) C&L Meter (I Like it!!!!!!)