ok guys I need some help understanding boost and map sensors with a stock ecu. I bought a novi 2000 8 -10 lb kit for my 1990 mustang. originally I was going to do it the right way by getting Andersons PMS and larger injectors and not using the fmu that came with the kit but money is going to be a little tight for awhile. So spending $1000 for the pms $400 for injectors and $100 to have my Pro-M calibrated to the larger injectors is just not an option this summer. so until i can get that stuff for now to save money I am going to use the fmu with my 24lb injectors and buy a msd boost timing master to add to my msd 6al for $250 and be done with it. the issue is this the msd BTM should be hooked up to a map sensor, and it is my understanding that to run 8 - 10lbs of boost I would need to run a 3 bar map sensor but the stock map sensor for my car I believe is a two bar because N/A cars only need a 2 bar map sensor. now everybody says that your cars ecu has to be calibrated to run a 3 bar map sensor because if it's not the ecu wont recognize the additional bar of boost and therfore won't send the required amount of fuel and lean out your engine. I thought if you ran the fmu that came with the kit and a boost timing master you wont need to tune your computer but how will the msd btm know to retard my timing if its getting its readings form a 2 bar map sensor which isnt recognizing the full amount of boost.
Am I over thinking this I would really appreciate some help understanding all this Thanks.
Am I over thinking this I would really appreciate some help understanding all this Thanks.