I know this question has probably been asked before but i couldn't find what i wanted with search, just wondering how big of a difference does building a cold air intake make over a cone filter in the engine bay? is it noticeable, does anyone have dyno pulle with a cold air vs. cone?

 

A well designed and built cold air intake will make a very noticeable compared to an exposed pod filter.
A dyno is the worst place to compare the two. Firstly the airflow through and around the engine bay is totally different compared to on the road, and secondly most dyno testing is done with the hood open, which is also not what happens on the road.

 

GOOD POINTS........never thought of that.

 

another question, theres a thread up right now,
https://www.rx7club.com/showthread.p...hreadid=281759
this guys has a metal pipe over the stock rubber, better you think?

 

well with just an open filter youre not doing anything but sucking in more hot air from the bay.....make an intake pipe(aluminum) with heat wrap, make the cold air box around a K&N filter and get the headlight air duct...that is the only "real" way to get a good functioning CAI.

 

not true please stop spreading miss information

 

and why is this not true...the whole point of an intake is to suck in cold air and reduce turbulence right....well you cant do this by an open filter, the engine bay is hot air and the ribbed rubber intake cause turbulence so you gotta replace it with a smooth pipe

 

Because the headlight vent doesn't do much.

People will start digging up the diagram of the FC in a wind tunnel and point out that it is a low pressure area, therefor little air will be forced into it - and none at all when the lights are up. The real problem is that air always takes the path of least resistance - and once the air gets in through the vent, it has to make it's way around headlight assemblies and metal bracketry - this is inefficient.

Taking the the FTP out does SFA too. The stock snorkle has ZERO ram-air effect either. It only works with a sealed box and it sucks air from infront of the rad - no air can get pushed in.

The only "Real" way to get a good cold air system is to either:

a) Put the filter in a location that cold air is the only air that it sees.

b) Build low restriction ducting that draws air from a high pressure zone right to the airbox.


That's why Pinfield357 said that your statement was untrue - the headlight vent is nowhere near the best way to have a "real" cold air intake.

 

there is true cold air intake or at least as close as you can get to true cold air intake available.... Santiago sells it....im pretty sure hes got enough information to back it up to

 

i have the a hks apadter with a cone filter with a alum. box built for it, seems to work fine for me

 

Do you think an exhaust shop would make a custom intake pipe?

 

No, but they might sell you some pipe so you can make one yourself.

With some patience, you can fab up a useful piece.

 

aztechrotary.com sell some true intakes....they have a kit that relocates the filter at the bottom of the car, in other words nothing but cold air

 

OK i don't need info on how to make or where to get an intake all i want to know is if there is a significant difference with cold air. I know the headlight thing doesn't work i knew it the first time i heard of it i mean come on how do you think the light shines through there, the headlight is right behind it and i don't know about you but last time i checked air didn't flow through my headlights very well, I'm cutting a hole and bringing the pipe out of the engine bay will this give me a noticable differnce?

 

When I did mine, I noticed an improvement.
You will notice a difference, and it is worth doing, on 2 conditions:

1) You get cold air in. Sounds easy, but you have to make it easy for the air to get there, and the more the better.

2) You keep hot air out. It doesn't matter how much cold air is getting into the filter if you have no way of stopping the hot air. At best you'll end up with a warm air intake at low speeds, and a cooler air intake on the highway. Make a box or baffling that blocks the hot air from the engine and behind the rad.

Take your time and do it properly. Nothing ruins the look of the engine bay quite like a half assed CAI!