R1 CHR said:
Does the car not adjust to a different and new method of air supply then?
Are you saying that there are no benefits to changing the standard airbox for an aftermarket induction kit?
And if not, why do such a large amount of people make the change? It's not just a cosmetic engine enhancement is it?
Hi
The ECU has maps for higher air flows. But it the way it measurses the air flow that is critical. The MAF measurse the volume of air by straightening the air flow, then inducing eddies in to the air flow, and measuring the number of eddies. More eddies, more air flow, unless you change the inlet, and the ration pf eddies to air flow is changed.
I would not like to make a definitive claim about the stock system vs. an after market one. But a couple of people on here who's opinion I trust have had good results just cutting away a small part of one side of the air box lid see
here
Why do people do it on later Evos? Don't know. I'd like to see some before and after dyno runs, with supporting data to prove all that has been tweaked is the MAF scaling and smothing table, along with the fuel trim data. Might be better things to spend your hard earned on, like beer and curry, or a track day, or some low profile wing mirrors.
MB
