Will dring holes in these improve performance or mileage at all for the expedition?

 

Check this thread out. http://www.fordf150.net/articles/idx...ification.html

 

The short answer is no. I have done the Gotts mod on my truck, I have not noticed any difference, good thing it was cheap

 

Ya I never noticed a whole lot either other than you can hear the air movement a little more in the intake.

 

I think it give a very very small increase in power MAYBE, either way I personally think the way it was from the factory is fine, unless you are racing your truck in a lot of wot situations, in which case it would like more air. And I highly doubt you are racing your truck lol.

 

I just trimmed off part of the housing itself. As far back as I could and still have the clamp work. You can definitely hear the motor get more air. I did get a little better throttle response and a slight increase in millage. I did it on the 4.2 F150 and my 5.4 Expy with the same results.

 

The only issue with trimming the factory air box is now you are sucking in the warm air from the engine compartment.

 

Yes I know but for a stock N/A application it really doesn't have an affect. If it was a forced induction it would be a little different.

 

Hot air is hot air. Whether or not it is forced induction is a moot point. There is a reason the factory takes cold air from the fender. Cold air is more dense and allows for more fuel which makes more power. Warm air hurts performance period.

The notion that you can hear it getting more air is hilarious. You can hear more intake honk but that doesn't mean more air is getting in, just that you disabled the facotry's silencing. The engine sucks air in. Unless there is a significant restriction it is capable of sucking a given amount of air for a throttle setting regardless of what you did to the air cleaner. The facotry system is designed to meet the engines needs at wide open throttle. So explain to me how you get better mpg and throttle response from hacking the intake? It was never a restriction to begin with.

 

Not a restriction? What do you think the factory air silencer is? Yes from the factory it might meet a standard but there is always little ways to make it better. Hot air is hot air yes and there are better ways to get cool air than the factory design. All I would have to do is simply make a box that seals when the hood closes. I get a slight increase in MPG and throttle response because the engine doesn't have to work as hard to suck air through the straw it was using. This is why you see most of the aftermarket CAI's use a box design. The opening from the factory is too small for it to be the only access for air.

 

Did I stutter? I said "not a restriction" and I meant it. How can the intake be a restriction when the exhaust pipe is the same size?

The engine is a simple air pump, air in, air out. The combustion process causes expansion meaning the exhaust should really be substantially larger to accomodate the gas volume after combustion. Since the air intake is larger, there can not be any restriction.

Cold air intake systems are a JOKE! I see they have managed to convince you though, score one for the marketing guys. You claim there is a better source of cold air than the fender? Sealing it to the hood and hoping the cracks around the headlights will flow better? Keep dreaming kiddo.

The only place there could be an improvement is at high rpm WOT, how often do you honestly drive that way. Full throttle at anything less than max rpms does not flow the volume of air necessary to create a restriction.

I think you should just remove the whole thing and let it suck with no filter at all. I bet it would really make it perform then.

Unless you increase the volumetric efficiency of the engine through cams, compression, head porting or forced induction, you have done nothing but harm the performance of your engine by cutting back the airbox.

 

Good luck when it's time to sell it. The $5 a year in gas savings isn't going to make up for the $500 less you're going to have to sell it for when someone see the cuts.

 

But it sounds so cool

 

Not going to resell the truck but thanks for the advice....

The air silencer isn't a restriction? So tell me how removing them on the old fox bodies gives a dyno proven 5rwhp time and time again? What are you talking about the marketing got me with the cold air in the fender hype? You yourself said this too. Granted it is usually not the whole CAI that helps out the air flow. Its the filter. But I am not here to sit an argue the technical parts of how an engine work because I already know this.

 

Clearly