Why don't car makers...

[charles]

The stock WRX air induction system is pretty good

 

[AlbinoMuntjac]

The stock WRX air induction system is pretty good

From what I've read on the Subby forums that I go to, the stock air intake system is better than adding an aftermarket induction system. Seems that you loose some power throughout the power band with the aftermarket intake.

 

[charles]

From what I've read on the Subby forums that I go to, the stock air intake system is better than adding an aftermarket induction system. Seems that you loose some power throughout the power band with the aftermarket intake.

Yeah, the idea is to not really change it unless you think you are gonna go for more than 500hp

 

[FATBOY]

The reason they aren't standard is because they increase noise, kill low end torque on some vehicles, and most have poorer filtration than an OEM filter. There is a site online (I forget the link) which compares a ton of aftermarket filters to an OEM one.

he is just about right but every thing a manufacture does if for $ only, the poor filltration on the cold air intakes could increase engine repairs 3 to 4 times under warranty. a budy of that build engines can tell the difference between a good and poor cold air intake after just a couple of races on it, (remember to oil the filter and keep it oiled, the oil is what's stoping the dirt and the filter just holds the oil.)

one other thing is that most cold air intakes are out in the elements more and on damp days, rainy days and wet roads the water will get in the filter and reduce performance

 

[Ceej]

the poor filltration on the cold air intakes could increase engine repairs 3 to 4 times under warranty.

Um, I don't believe that. If that statement were true manufacturers would not use them and they would void the warrenties of people who did.

 

[zx2sr]

a intake will not affect the engine poorly at all i think your confusing intake w/ filter, a crapy filter will let more dirt through, but a good filter (k&N) will not afect the car poorly at all if cleaned and inspected when it should

 

[Ceej]

Don't confuse CAI with "big filter on the end of a tube". There's nothing in a well-designed cold air induction system that would mean the car's at any risk of hydrolocking. Our 1991 VW Passat had a cold air intake.

Most aftermarket "CAI" setups will not actually help with power output and the badly designed ones will put your engine at risk. They do sound cool.

Keith

Dude, to hydrolock the end of your cold air intake would have to be totaly under water. How many times has your car been in water that high?

I don't understand people who drive cars and worry about hydrolock, we do not have Jeeps you know...

 

[scotthidley]

Keith was saying that it wouldn't. In the totem pole of knowledge, he's hovering at the top Hydrolock would happen with any type of intake only if it were submerged in water, regardless of ram air, cowl induction, or whatever. Again the main reason is nvh. The manufacturer doesn't care about making another 2-3 hp, they take an engine and make it meet federal requirements.

 

[Ceej]

I gotcha.