giant

i want to put cold air on my 1987 rx7 and i need to know what i need in the intake to do so EX. the afm meter does that have to stay... if you can help could you get me some pics of the items i would need thx...

phoenix7

have you searched yet?

Look up

AAI

Do a little research on your own before you post any more.

RB_eater

iTrader: (1)

[Evil aviator]

What your are looking for is an ambiant air intake (AAI), cold air intakes will actually cool the air under ambiant temps.

[/Evil aviator]

toplessFC3Sman

iTrader: (1)

but he's just looking for cold air, not the intake. Id say move north (if you're in the northern hemisphere)

Boosted11

iTrader: (11)

I would say all vehicles, but you almost had me.

Get a K&N air filter, they cost about $200? It has instructions, and everything needed for the install.

Evil Aviator

Your car already has a stock intake that feeds from the front of the car to get "cold" air.

The AFM needs to stay unless you upgrade to a standalone engine management system, which is about $1,000-3,000 depending on the model, plus about $500-1,000 for tuning and installation.

lol

Josh13B

As evil aviator said. You have to keep the AFM unless you get an ECU upgrade.
I bought an adapter plate for the AFM and a K&N pod filter. cost me less than $100. Only took about an hour to pull out the stock box and put the pod in. Its really simple.
I'm getting a headlight cover with an air scoop. Cold air goes straight to the pod You'll also wanna partition the area behind the headlight so the warm air from the radiator stays away.

phoenix7

yes and no. The little vent ONLY works if you remove the plastic cover on the hood (it's a 3 part plastic piece right behind the headlights/bumper) and even then it won't help you much unless you have it enclosed in a box. (like Josh said)

It becomes useless when the headlights are up and detrimental if all it's sucking in is hot air (i.e. no airbox)

I spent 30 bux on a reusable filter so I can just wash it, spray it down with oil and put it back in less than a day.

87 t-66

iTrader: (133)

get a $15 ebay filter and get rid of the stock air box. you have to keep your afm with the stock ecu.

phoenix7

if he doesn't have an Airbox then it's better to keep the Stock intake.

freemanrx7

The $200 K&N setup is really nice. It does use a diffrent kind of adapter. I think this is very nice upgrade and I'm telling you from my own experiance not just what people say on this site.

phoenix7

ok I'll bite, how is it a nice upgrade?

phoenix7

RETed was the only one that posted in here about a REAL CAI but everyone dismissed it

Everything else will be inferior to the stock intake (even the $200 K&N) unless you can build a box for it.

micah

Fixed.

phoenix7

that's just being nitpicky. Why would you upgrade an ECU to anything BUT a standalone? I know there are some reflashed ECUs out there but those can kill your car unless it is specifically flashed for YOUR upgrades otherwise it cannot be considered an ECU "upgrade." Maybe that's just my way of thinking though.

ohayou88

iTrader: (7)

upgrading intake just go find the cheapest possible one. i'd say go with rx7.com bonez system 90 bucks cheaper than K&N and comes with a breather filter and a maf adapter.

besdies that your gonna have to do a custom intake. i think there was a write up for using a prelude short ram to make a cold air, but that involved cutting the fender well. but you can come up with something inventive.

micah

Well, NOT rtek, safc, and etc.. thats what I was clarifying.

NZConvertible

So what about when the ambient air is cold?

And is also very restrictive. Redesigning the intake for much lower restriction while still preventing engine bay air from entering is easy. Mine meets those criteria, and is hardly an engineering breakthrough.

Those are practically useless. They're simply too small to provide all the air the engine needs, and the rest will be drawn from the engine bay through the gaps between the heat shield and body (assuming you have one). And once the headlights are up they do absolutely nothing.

Do you realise that you get basically zero performance increase compared to a new OEM filter? Don't believe the marketing BS. The pressure drop though the filter is a small fraction of the pressure drop of the whole airbox. It's the filter that's airbox, not the filter.

Idrinkalot

I was going to get an HKS air intake system for my s5, but everyone here seems to be against that....I guess the stock intake is good enough.

Does the s4 have a good OEM intake system?

Evil Aviator

"Cold" is a relative term. The implication from the naming convention is that an aftermarket "cold air intake" would supply colder air than the stock intake. With a Honda, that may be true. With an FC RX-7, that is not true.

The stock system is not significantly restrictive until the engine hits about 200hp or so.

I agree, but for some reason very few of the intakes that I have seen are designed properly.

Be quiet or the rich vendors and the brainwashed masses will call you a "hater"! Actually, there are many cases in which upgrading the air filter helps, but for the purpose of this thread I think it is OK to say that the performance gain would not be significant.

Evil Aviator

The HKS system is designed well compared to other simple pod filter kits. The main problem is the filter element gets dirty really fast, and you can't clean and re-oil it like some of the other aftermarket filters.

If you have a non-turbo street car, the stock intake will work fine. If you have a Turbo II with some modifications to increase airflow, then you may want to consider upgrading the intake.

It is good for a production car of its era.

freemanrx7

Sold to phoenix7 for $200. --K&N filter charger


No really my 88 gxl seems much more spirited with this setup. Although $200 is kinda priceeeeeee.

NZConvertible

That's not an implication, it's an assumption that could only be made by a very ignorant and/or stupid person. I have trouble believing that many people are stupid enough to believe a "cold air intake" will reduce intake temp below ambient. I know there are lots of idiots modifying cars, but only a very small and insignificant number of people are going to think that, and who cares about them anyway? The vast majority of people are going to realise that "cold" simply means "colder than the engine bay". I've certainly never seen anyone in this forum suggest they thought anything else.

I could say that "restrictive" is a relative term. But you're right that a Turbo will be much more benefit from improving on the stock system than an NA will.

Well I'd call those vendors "scammers", or at suggest they're least very economical with the truth.

I've seen the results testing done on a bunch of airboxes and in every case the pressure drop was tiny compared to the pressure drop through the box itself.

AUGieDogie

iTrader: (4)

My understanding is that the S4 air box is quite restrictive. The S5 is supposed to flow much better. That being said. If you really want to do a cone, do some fab work and build a box (vinspeed does nice work) and route it so that the stock hose over the rad matches up with the box.

NZConvertible

The only differences between S4 and S5 airboxes is the AFM connection and some cosmetics. They'll flow just as badly as each other.