I have an idea for forced cold air induction for my car but I need some engineering help. I don't want to go too deep into the design but my one hangup is how to filter the air through 3 inch tubing. Is there a filter that could mount in a 3 inch tube? Are there other ways to filter air moving through a tube? Would a filter be enough to stop any water that might be forced into the intake? Thanks for your help.

 

One of the reasons that there is an airbox instead of just filtering through the tubing is that when air travels from one volume to a larger volume (ie the airbox) the velocity slows down. When the air slows it drops many of the larger and heavier particulates that would basically act as a "bullet" being fired at your airfilter. The airfilter can be thinner and less obtrusive to the airflow this way. If anyone would make an airfilter for a 3" tube it would probably have to be several inches thick to have the same filtering effects as the airfilter/airbox combo.

If you find differing info please lemme' know. Goodluck

 

There is already a company that makes CAI's with an "in-line" filter, forgot the name, when i find out ill let ya know

 

Thanks. I would like to know how they did it because I want to be able to customize where the tubing goes. I'm anxious to see what others have done like this.

 

That would interesting......do they have specs on the resistance vs traditional filtering?

 

So what if you were able to force air into the airbox? Would it matter from which side the air came from? If you were able to force air into the airbox from outside the car, would it act as a forced air induction system? Would it act as a CAI? Would that hav gains beyond a typical hi-flow intake like the JWT or the PR CAI?? Thanks for your response.

 

The side that the air enters shouldn't have significant effects. When the air enters the airbox, its velocity decreases while the pressure increases. Not sure whether RamAir'ing would increase the pressure or the velocity or both as it travels to the airbox, but if there are greater numbers of either the same effects should occure when it enters the airbox with the numbers carrying over to one degree or another.

 

You lost me with that response. Basically I want to know if there would be gains from forcing air into the airbox from outside the car. I know that my car has a small airdam above the grille that leads to the box. So if I were able to force 2 3 inch tubes of air into the box, would this benefit me? Initially it seems like it would have to. What's your take?

 

heres the company www.prmracing.com

 

If there is a positive pressure where the air enters the tubes, you will get a gain. If the air is being ducted in from outside the engine bay it will be cooler/denser, and you will once again get a gain. Better?