so i have been reaserching and nothings clear some say stock box is better or some say its not, i would like to do a custom set up like this http://vehicross.blogspot.com/2007/1...ntake-cai.html and have a scoop where the fog light would go to get cooler fresh air.. i would like someone who has knowledge and actual numbers or heavily experienced to respond to this post i dont want another 3 page about people with 50 post under their belt and no experience rambling on about some BS..

thanks in advance

 

A well-designed custom intake would be better than the stock air box, but you are only looking at about 1-2% hp increase. The stock air box already pulls in fresh air, and it doesn't become restrictive until the engine starts to make about 200bhp.

Where would the fog lights go? In the brake duct? I wouldn't want to block off the brake duct on my car.

 

I'd stick with the stock box unless you're looking into serious porting or forced induction. With a K&N drop-in you'll be good. I really don't have any proof to back it up, but like Evil Aviator said, it won't be restrictive until about 200 hp. There's no way you will make that much power n/a. With the stock box, you get the added bonus of not having to worry about sucking in water and creating excess noise.

 

bump thanks evil

 

I read an intake comparison article not too long ago, it compared the stock intakes of many performance cars. It also compared the intercoolers of stock vehicles also.

I remember the FC RX7 having one of the worst airflows out of all the stock box setups, and even with the conjunction of a K&N drop in filter it still performed poorly.

Everything was flow tested in a very professional manner.

 

I noticed a slight difference with just a cone filter on the MAF sensor. That and I like the "bromp" when I smash the gas. I would definitely recommend finding a way to get fresh air into the engine bay other than the super heated air that has to pass by the exhaust manifold, or header in my case.

 

http://www.autospeed.com/cms/A_110720/article.html
Unfortunately, what they neglect to tell you is the physics behind making power, and the insignificance of a restriction at lower horsepower levels. For example, the benchmark in that test is 1"H2O. This calculates out to a 0.036127 psi loss, which equates to a theoretical loss of about 0.3% hp on a non-turbo engine. Granted, this loss increases geometrically as the airflow increases, but it will not be a significant factor on a street-driven car with a stock engine. In a racing situation where a fraction of a second can make the difference between winning and losing, then yes, even 1/2 hp would be worth the effort. Or, for those who are just looking for an easy project, a CAI is a good place to start since it is fairly easy and very unlikely to hurt anything if you make a mistake.

 

i went out an bought a autozone filter and took out the stock box not only did i not see an increase in performance but it also give me alot worse mpg so i took back the shitty cone filter and put on my stock intake again and it seems it works better overall