Agreed and it will not flow equaly to each runner according to the CFM data I have for a manifold off a supra of almost identical design. Manifold design is a night mare, did hundreds of mock ups and idealy you want a huge plenium chamber fed from inversly exponential curved walls from throttle body to runner entrys to equalise flow, but not so big as to give silly fill times, a FMIC can add 20ms to the full time of the pressure side of the engine, and a bigger plenium could double that. Bottom line tho as you make one area better another suffers. Idealistic is unobtainable.
What sensor do you use with the wide band btw? 6 or 7 wire, Bosh, Motec etc etc etc. And where are those dash displays available from?