Originally Posted by ronj100
I'm just a passenger car owner who has some noisy flappers. However, I am a mfg engineer so I have some tech knowledge. So anyway, say that again as if you were talking to a small child or a golden retriever.
If I pull out these flappers, what would I tell my mechanic about how to retune the engine?
On the drivers side below the steering wheel, there is a obd2 connector= (onboard diagnose) connector. For tech to plug in their IDS computer= (intergrated diagnose system) computer, to figure out codes & run programs with. A Xcal3 by SCT is a flasher that you plug into the obd2 connecter & reflashs the pcm(power conrol modu.) By reflashing the pcm is like= in old cars w/ carbs/distubiters, where you change the timing by turning the dist. either advance or retarding it & recurving it w/ lighter or heavier springs for how fast & how slow you want the timing to come in. And you also have how far you want the curve to come in to. And then there is the carb to adjust. I think you got the just of it. The factory has set the pcm up for a very broad range for a lot of different drivers. A tuner= a flasher makes your car so much more drivable= a lot smoother than you can think. Say like a electric r/c car w/ a electronic speed control= one has steps ever 500 & the better one has them ever 1000 times. The one w/ more steps is going to be a lot more lineier or smoother than the one w/ less steps. So you buy the sct xcal3 & plug it in & down load the tune your self in a few minutes. It pulls the oem out 1st & then downloads the new & improved one. I hope that helps you. Oh & if you have issues w/ the imrc= tumble flaps, (you'll need to remove them & then you'd need a tune for that) >>>or replace the manifold w/ a new one, which is 'bout $200.<<<