Thread: Quick question on Air Induction CAI

Originally Posted by massivesystem

So I ordered a PCM and other items from from overkill last week and I was talking to Will and he stated that if you keep the stock box which comes in three sections and gut out the center to equal the entire sizes of the stock filter, and then remove the 3rd part of the box that sits behind the headlights and cut it to equal the true opening. Then drop in a cone (4x9)

True it does not have the looks of a Wizaired or a cold air inductions box but, you have a very large opening inside of the stock air box which should provide equal performance.

Yes/NO ?
Comments.

Unless posters are scanning and giving you numbers you are going to get allot of inferences and opinions about this rather then some actual evidence.

That being said my opinion is that the stock air box would heat soak allot easier and faster then would a Wizaired and a Cold air inductions box. The plastic is more dense then the insulation on the later two and therefore wouldn't transfer heat to the environment as easily. Also [if your taking off the part i'm thinking of], you would get allot of heat from the engine compartment thus effectively making your CAI a HAI.

Ah i think i get it entirely now, you are modifying the part of the box that sits behind the headlight [for some reason i didn't quite grasp that the first time around]. Unless you could get the airbox opening to sit flush against an area where it can get fresh outside air it will still be sucking in air from the engine compartment. The wizaired, and cold air inductions box [if im not mistaking] sit flush against the right side of the engine compartment effectively mostly sucking air from the inside of the fender. [My Thrasher does this.]

The stock airbox has a hole that pulls air in from the fender area. Problem is it gets heat soaked easily. I think what he is proposing is certainly possible, but the gains would be dubious at best.

It's definitely an inexpensive mod, though.

Have a look at this write-up. http://www.grandprixforums.net/f18/g...ures-1103.html This was made to house the stock type filter but increase airflow. To be honest, with the PCM taking up so much room I can't imagine getting a 4x9 cone filter to fit inside.

Now if by removing the 3rd piece, you are talking about the piece that seals to the headlight area, then you might as well just use your stock fduct with a 3.75 dia aluminum tube to fit the cone right on it because without that piece it will be a HAI anyway. imho

that would have way too many bends to make any good intake. the only way to do it would be to mold a scoop into the headlight area.

dean did it to his regal:





it probably works decently. you might also be able to get away with ducting something from the foglight, but honestly ram air is a bad concept anyway. you have to be going in excess of 150 to get any sort of boost out of it.