To make sure nobody gets the wrong idea I am NOT bashing any aftermarket parts or intakes..just stating the facts.

I have been reading plenty of post regarding aftermarket intakes and how airflow is greatly increased and HP is can be gained by the higher level of air intake.. As a machincal engineer it was not making any sense as to me about what I was reading. Over and over I read " This intake sounds mean", "it's sooo loud", "you can hear it sucking in the air!" It's hard to explain but when you hear the sucking/ whistling of air that is acutally caused by air RESTICTION. When you hear you intake sucking in air it is becuase the air is being restricted and the engine is having to use it's power to draw air into the system. A simple yet effective way of giving an example is when you whistle with you lips blowing air you have to put your lips close together to hear it, and it's harder to exhale.. BUT if you opened you'r mouth open and far as you could you would not hear any whistling and you could exspell the air from you lungs MUCH faster.

Just a though.. wondering what you think about it.

 

That whistling sound is actually the result of a small restrictive throttle body.
My CaI doesnt whistle when it sucks in air...it makes a HUGE whoosh sound...so its taking in ALOT more air then the stock filter.
The whistling is just the air bouncing around in the throttle body

 

what size is the stock throttle body? I know there is a 60 mm you can get.. does anyone know the size of the stock?
so the to get the full benefit of the intake you need to upgrade the throttle body

 

But.. i think what he is saying is that ANY sound.. whistle, whoosh, roar..... any sound.. is a a sign of a restruction somewhere.. i tend to agree and im not arguing with the fact that some of these CAI are creating alittle extra HP.. probably in the smoother flow of air... im just saying.. that the original poster does have a point...

 

Before I couldn't mechanical engineer, now I be one, it not making any sense to me.

Think about the laws of physics here. A free flowing tube with little restriction mounted in low pressure area, after all, an internal cumbustion engine is nothing but a air pump low pressure air in, high pressure air out. Newtons first law of physics
http://www.physicsclassroom.com/mmed...tlaws/cci.html objects in motion will stay in motion unless acted upon by a outside force.

The constuction of the intake pipe, is a large pipe with minimal bends in the piping. The inside of the pipe is smooth to promote better flow. the mouth or filter is usually mounted in area of low pressure and the temp in that area is usually lower than engine compartment. The engine when started has a vaccum so it is naturally going to suck air, lower air temp with more flow means more powers. I am not a mechanical engineer, just an Electrical Engineer, and physics is physics. for give my shipping around, I written a brief in quite some time.Bill[/url]

 

CAI will make a small amount of HP because the air is denser.

 

No. any kind of sound doesnt mean less restrictive. It just means the air is bouncing around off of something. If you stuck an indutrial sized fan used in factorys under your hood and turned it on...itd still make a noise.

 

You would think a true mechanical engineer would know how to spell it.

What does being a "machincal engineer" have to do with this. Most Jr. High kids can figure the same thing out. OK, maybe not todays American Jr. High kids, but good ones can.

In any event - the sound is from the throttle body, which is more evident by the less restrictive intake.

 

it that your idea of a turbo? if air having to bounce off of something this it's being restricted..

 

I dont know what youre talking about, and I kinda think you dont either

 

^^^^^^

 

ok i suck spelling and getting my point across, that you're right .. but if you can hear air bouncing off somthing then the air flow is being restricted

ScionDad..A car engine is machanical, use what you know about jr high schoolers take a lesson from your kids

 

I never said you didnt know how to spell or get your point across...I said I think you dont knwo what youre talking about...plain and simple
And also, I never said the air in ANY kind of intake ISNT restricted. Its impossible to make air in any form, UNrestricted....even the wind blowing thru the air above your head (and inside it I would guess) is restricted by SOMETHING...The very most you can hope for is LESS restriction
The cold air intake makes the air being sucked in LESS restricted then the stock...and, well...cooler

 

Yup, but what is a machincal engineer? I'm an Electrical Engineer and I assure you - I know HOW to spell IT, esp when I received my degree.

So, are you mechanical or machanical?

Oh yea, BTW - you can't get away from air flow restriction. Kinda the nature of the beast

 

you must be a jr high schooler if you get such a thrill from a typo.. grow up

 

I'm kinda curious. Why would you post a topic like this? Are you suggesting that the makers of the intakes are lying for the HP gains and the people talking about the sound are actually idiots because you THINK the aftermarket intakes are "equal or even more" restrictive? Because that was the tone of your post.

Then, when you imply this, you can't even take the time to check your spelling as you insult others in a back handed way? If you have the credentials, great, offer them to the group and it will be appreciated. Act condescending and you will get your a$$ handed to you in electronic format.

Might want to try and relax and post your observations/questions in a less confrontational manner.

 

nominated for worst thread ever.

 

No thrill from a typo, I usually ignore them. I just expect a "professional" engineer to be able to spell their field of choice, esp when they are providing their credentials to justify their position on a given topic. If not, then it might lead to thoughts of someone just being a (what's the kids word) poser?

Not saying you are, just saying what others are "thinking".

If you can answer this, then please do. Do you recommend leaving the factory intake or go aftermarket? Advantages if any? NA engines choke points? Any ideas how to reduce them?

 

you all look like idiots pointing fingers at other idiots. it's not even on page 2 and it's way off topic already.

 

^^^^^^ Second that...lock this crap up!!!!