Modifying stock intake

[magnum4sissies]

I was thinking about this while taking out the stock intake...

what could be done to increase airflow?

I'm going to assume, the engine makes a suction in the box which pulls air from the bottom up into the engine. So, I see why removing the air silencer helps the flow a lot.

What if a large section was cut out of the bottom of the box?

Enough to hold the filter in place of course.. but enough so the bottom is well.. a huge whole for suckin' in a lot of air. Though, the tube on the bottom is fairly big.. but it's constricted to only pulling in from under the engine area, i think.

And, my guess is, it would still have a big of suction, seeing how a lot of aftermarket intakes are just out in the open.

[Samoan Tsunami]

I was thinking about this while taking out the stock intake...

what could be done to increase airflow?

I'm going to assume, the engine makes a suction in the box which pulls air from the bottom up into the engine. So, I see why removing the air silencer helps the flow a lot.

What if a large section was cut out of the bottom of the box?

Enough to hold the filter in place of course.. but enough so the bottom is well.. a huge whole for suckin' in a lot of air. Though, the tube on the bottom is fairly big.. but it's constricted to only pulling in from under the engine area, i think.

And, my guess is, it would still have a big of suction, seeing how a lot of aftermarket intakes are just out in the open.

the main reason the stock intake reaches out into the resonator for air is because the air in the resonators area is outside of the engine bay. intakes where the filter is placed outside the engine bay are called CAI's.

the intakes you see where the air is drawn from the engine bay are called short ram intakes or warm air intakes.

logically and realistically air outside the engine bay area will be cooler. using the term COLD for anything is highly misleading, but its a good selling gimmick.

drilling holes in the box on the side of the engine bay would take in some of the cooler air on the other side of the engine bay (in the bumper) but you will also take in air from the warmer side where the engine is located.

best bet would simply to be to remove the silencer. the hole that goes down to the underside is more than large enough to support air flow on stock engines.

drilling holes in the box or anything of that sort is kinda a stalemating point to do. mainly because no one yet (that we know of) , as increased the need for airflow to the engine, whether its lift or duration from a cam, larger bigger bore throttle body, or stroke of the crankshaft and pistons....basically anything on the intake cycle of combustion.

[hyperbolic]

drilling holes in the box or anything of that sort is kinda a stalemating point to do. mainly because no one yet (that we know of) , as increased the need for airflow to the engine, whether its lift or duration from a cam, larger bigger bore throttle body, or stroke of the crankshaft and pistons....basically anything on the intake cycle of combustion.

Eliminating the box alltogether and using a larger tube from filter to throttle as in the Air Hammer and AFE have proven to incease HP.

[Samoan Tsunami]

Eliminating the box alltogether and using a larger tube from filter to throttle as in the Air Hammer and AFE have proven to incease HP.

for the record, the mopar intake and the k&n setup has also shown to increase hp as well...

however if modifying the stock box being the topic, he wasnt really asking about intakes. just improving whats already there.

[magnum4sissies]

Well, I'm planning on a AirHam HO or K&N when I actually upgrade.

Until them, I'm tinkering, until something bad happens.. haha. But, I'm working my best to not step out of my knowledge area until I feel educated enough to do so on my own.

Well, if those falsely advertised intakes aren't actually cold air intakes, how does a real one work? Just like the stock one, but more designed for more air flow?

[rwalshphoto]

I think the idea behind most of the intakes available is getting the filter outside of the box and relocate it behind the grille area. Technically yes you could say a true CAI would duct air from outside the bay...like the Volant CAI. However, in the big picture for the system as a whole the size/shape of the intake tube and the size and placement of the filter is what contributes most to torque and horsepower.

[hyperbolic]

And on my second read I notice that we're talking SXT and I assumed (stupid me) RT and made my comments. I'm not familiar with the 6cyl setup but on the Hemi the K&N was worthless. I made a CAI (Just another DIY CAI) that got air from behind the grille, didn't increase performance that I could measure. Don't assume that air from behind the grille is getting to the filters outside of the stock box. There are panels beside the radiator that guide air from the grille into the radiator and not into the engine compartment.

A long time ago I read that the stock Hemi intake was carefully tuned for all around performance. If any aftermarket intake did increase peak HP maybe it's at the expense of lower end torque. I'm curious but not enough to search out all the relavent data on the forum.

[magnum4sissies]

Even though I'm not looking for much performance out of my SXT.. I wouldn't mind a bit more low end torque.. Even stock there's plenty of torque once it gets going.. Thank God for the autostick.. makes passing and such so much easier

[MooNDoGGie]

Even though I'm not looking for much performance out of my SXT.. I wouldn't mind a bit more low end torque..

Join the masses! I have all the mods. Now I just need a tuner to make it all happen. Lets hope Diablo comes through.

[magnum4sissies]

Well, I only got the v6 because insurance is steep for young males, for v8 engines.
Otherwise I would be rollin' in an RT.

So, I'm not looking to make my SXT fast until, yes hopefully a tuner, comes out.

[DannyC]

Throw away the air silencer. It's like a muffler for the intake. Once you do that you will have a big hole in the bottom of the filter box to let more air in. You are still trying to suck air through a corigated 3.5" tube that is very ineficient. Look at the difference between the stock tube and the Air Hammer HO.

There is no substitute for the Air Hammer :D

[MattRobertson]

Throw away the air silencer. It's like a muffler for the intake. Once you do that you will have a big hole in the bottom of the filter box to let more air in.

Exactly.