That pretty much HAS to be a home job. What company in their right mind would neck-down a CAI before the throttle body?
Makes no sense. Very nice welds though.
Speaking of which...Where is your MAF sensor? Is it on the bottom of that necked-down piece?
As far as the specifics of the ECM programming, I do not know the details. However, the modular 3V has a tendency to improperly "learn" changes to the engine's operation. For instance, if you install a set of headers but don't tune the engine it will progressively run worse and worse. With all the sensors and engine operating parameters these cars come with, you'd think you'd be able to slap anything on and it would properly compensate for air, fuel, load, etc.
then Mass Air came along and you didn't really have to worry so much about tuning unless you went forced induction, or full race... What's different about mass air now than then?? Why does everything require a tuner??
As a tuner I can tell you that the full explanation of the differences between then and now would take all day to describe.
But the biggest and easiest to explain difference between now and then is that the 89-93 mustang had a very simply Wide Open Throttle spark advance (timing) table. If you were at a given rpm at full throttle you always got the same spark advance regardless of what you did with the MAF or how badly you screwed up the air intake track.
Now, on the newer cars, all of the primary spark advance calculations by the computer are load-based. The computer determines how much load the engine is under by comparing the airflow as measured by the MAF sensor with the displacement and rpm of the engine. From there it uses the calculated load to determine what spark advance to run. If you try to do the old-school trick of changing the MAF size (cold air intake tube size), or fooling the computer by "recalibrating" the MAF, you screw up the load calculation and the spark advance is wrong.
Fortunately, we have now have much better tuning capability than we did back then, so we can reshape the air intake tube (with built in MAF) any way we want for the best airflow and then adjust the tune to make everything work right again.
So basically, we've taken the best attributes of a speed density and mass air and thrown them into a blender... In theory, (as I recall) speed density, was a "better" way, but the lack of available devices (I think they called is a TWEKR or something like that... cut me a little slack here, I'm old) it was too cost prohibitive to tune every time you changed plug wires (exaggeration for humor and point purposes) to own one, or find someone who wouldn't gouge you... but once tuned (tweeked) it would run like a scalded dog...
( No animals were hurt or injured in the typing of this post, the dog is fine and it was actually cold water...)
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