wanic35

whats the best cold air intake for an fc?? right now im leaning towards the secret weapon r. i want to hear what you guys think is best.

jonesfromindia

they dont make cold air intakes for our cars. only cold air boxes, and i cant remember the company. like mariah or something.

alexdimen

iTrader: (13)

The closest source of fresh, cold air is the fenderwell

SureShot

Here's a nice DIY intake.
Home made box with a PVC duct to the front.

killinit937

genious!

wanic35

nice. well what would be the best short ram intake then? i'm leaning towards the secret weapon r. i'd like to know what you guys think is best. and put the site if you do suggest one.

sidewayz_FC

might as well get a drop in filter, short rams wont do a thing power wise for you.

wanic35

what is a drop in filter. tell me more. and yes i am looking for more power.

InsomniacFC

iTrader: (4)

A "drop-in filter" is basically the filter that goes in the stock air box requiring no modificiations to put int. What they are referring to is an aftermarket filter like a K&N swapped out in it's place offering a few hp over the stocker. I think the K&N for my car (an 86 GXL) was $50+ last time I looked. Kinda steep, but you never have to replace it unless it somehow catches on fire etc...

dwb87

iTrader: (22)

SureShot, does that intake do well in wet weather? I mean, does the PVC duct keep the filter nice and dry?

InsomniacFC

iTrader: (4)

Your best bet is to get an maf adapter plate off of ebay or the forums classified section which could vary from $10-100. After that you'll need some sort of cone-style filter to put on it which also varies in price/quality/filtration. K&N is the most easily aquired as you can get it at Kragen/Autozone/Wal-mart but other brands like AEM, Blitz, and Injen etc offer them. It will increase horsepower but not that much.

Or you can go with a ready made kit from Mariah motorsports or Corksport but that'll cost about $150.

Idrinkalot

Hey SureShot can fill us in on how you did that bad boy? How much did it cost to do

rx7racerca

iTrader: (1)

Drop-in = something like a K&N that replaces the stock paper filter with an oiled cotton media, and "drops" straight in to the stock airbox. It might be good for 1-3hp - not really enough to notice, but since it's something you replace regularly anyway, and it's easy, why not? Otherwise, you need to fabricate an airbox combined with a cone filter like the pic above, and route in an airs supply from outside the engine bay, like the fenderwell, which will mean cutting steel to route hose/pipe. Without the outside air feed, your cone filter would just draw hot engine bay air, and quite likely cost you horsepower.

That Rx-7 kid

great..........another one of these threads..........and here I clicked on this thread to see someone come up with the "Best Cold Air Intake" for the n/a.......

InsomniacFC

iTrader: (4)

Same here

Nick86

iTrader: (1)

Links all fixed, see the post below! Thanks

wanic35

thanks everyone.

Nick86

iTrader: (1)

The links don't seem to work in my previous post, so I'll repost it again!


Well, I consider the one in the pic to be the best, because I designed and built it! lol. SureShot was nice enough to host the pics for me when I originally posted it.


Here's the writeup:
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/got-cold-air-i-do-pics-181680/?pp=15

The pics posted on the first page are no good anymore, so I reposted the entire writeup on page 5:
https://www.rx7club.com/showthread.p...0&page=5&pp=15


The box seals to the hood with rubber and doesn't allow hot air in. The PVC pipe exits under the car far enough back of the front and high enough that you wont hit it on anything. While a ton of cold air comes in, very little if any water makes it up the tube no matter how hard it rains. To me this is the major advantage over the Prelude Style intake that places the filter in the brake duct opening. Some people fear hydrolock, but to me the major issue is that a wet filter is an inefficient filter, so when it rains you are loosing the benefits of having a CAI in the first place! Also, this way I still retain my brake ducting.

So the way I see it, this is the best N/A CAI! It Provides a lot of cold air, shields heat, the filter stays dry, I still have windshield washers, I still have brake ducts, I don't have any odd scoops and I don't loose the benefits when I turn on the lights.

Bob Boberson

iTrader: (3)

The one I made.


Seriously, no one makes aftermarket ones like previously stated. Short ram and Weapon R sucks in my opinion, but whatever floats your boat.
Just get some piping from a muffler shop, fab up the CAI cut a little hole and remove the brake cooling duct, and you now have fresh air to your new CAI.
BTW, don't worry so much about water, rotaries don't hydrolock.

SpeedOfLife

iTrader: (16)

Just don't let water or anything else soak your intake or it'll slow flow and shorten the filter life.

And... wouldn't a brake cooling duct be somewhat important for performance? I wasn't aware '7's have them, but I haven't owned a '7 yet. Hopefully sometime this summer...

SpeedOfLife

iTrader: (16)

Oh, also, K&N isn't the only brand to go to for filters, there are other cheaper brands out there that are basically identical to what K&N sells. Particularly the cone and dual cone filters, which work great. I have a Bombz dual cone filter on my 323 and it's lasted about 4 years now (and has gotten wet on occasion), one cleaning, and still operates great and is in very good condition. My friends got it for me when I was in high school, and I KNOW they didn't spend over $30 on it, including the aluminum adapter.

Mechanic

i would do what nick did + the upper pipe bob did, and vola! presto! i got gold! lolbut then... until i have the funds to move on with my 7.. its just gonna sit in my yard.. and hopefully not rot.