The great intake debate!

[fmicle]

I am not debating whether stock intake provides better emissions, that's obvious, but manufacturers don't design parts with one goal in mind only. They are aiming for many things with one design: emissions, noise, vibrations, safety, reliability, easy access/replacement, compatibility among different models etc. I don't believe the main factor for better emissions is the air intake, I believe it's the ECU, the fuel mixture, air to fuel ratio, not to mention the fuel itself. That's why gas in California is most expensive in the US, because it's higher grade, meant to produce less smog - no matter what car you put it in.

Usually smog numbers are relative, parts per million or whatever measuring units they use. More air, means more fuel being burnt, but the ratio of exhaust gases will be the same, as a percentage of the whole. Of course in absolute numbers with the stock intake it will be less, because if you pump in less air, you burn less fuel, so there is less exhaust. But I believe the smog measures concentration of gases in the exhaust and not the absolute number of SO2, CO2, CO and whatever other molecules produced.

[Tamago]

Originally Posted by fmicle

That's why gas in California is most expensive in the US, because it's higher grade, meant to produce less smog - no matter what car you put it in.

LOL

[camelll]

Originally Posted by Tamago

LOL

That is what I thought