I was referring to how OP says cold air intake increases intake pressure that the MAP sees, which is entirely false, unless you have air charger. I was also referring to 1989 1.9L DOHC engine with a MAP and IAT, where 02 sensor determines fuel trim completely.
MAF is used to determine the mass of air available to determine how much fuel to use and injector pulse, in this setup the 02 sensor is merely used for minor corrections, or not used at all (diesel appilcations) while if equipped MAP ,still used to determine engine load for EGR and in some cases ign. Adv. And possibly injector pulse, depends on how vehicle is set up. MAP is not used for primary engine operation, but is there as a back-up for MAF failure, IAT is still used for ign. Adv.
MAP determines engine load by measuring vacuum, also for again EGR, and injector pulse, and ign. Adv., depending on a engne with no MAF that is.
As for I? I am just a simple performance enthusiast building a Perf Spec 190HP (124HP stock) NA powered 4-cylinder 1.9L that gets 50+mpg, it will compete in multiple race events, so if this mod does work performance wise, expect a bit of business and publicity in a year or so when it is completed and has participated in a few events, there is a build thread on the Saturnfans forum.
This is also why i am asking for the performance numbers, such as any dyno runs performed and the such?