mannyFC

Hi guys, I have a Series 4 FC SE. I was searching for intakes online, and I came across this one, http://hksusa.com/products/?id=3190&rsku=6267, made by HKS. Does anyone on here have one? If so, how is it? Also, do y'all know if that's a whole intake system, or just the filter? Thanks in advance, and sorry if I sound like a noob

2slow4stock

iTrader: (18)

Don't do it. Just do the filter in the box..

misterstyx69

iTrader: (142)

ya,you can do that to save dollars for sure.
That intake is $215?..holy crap!..you can buy a parts car for that.
you can also buy a Ebay filter,2 clamps and a AFM adapter for 45 bucks tops too!

Hypertek

iTrader: (3)

HKS is a good brand, i have one (though i scored it 2nd hand on ebay)... with the HKS, it is a 50 state legal intake, so if you lived in cali you wont get hassled for it. In Tx i dont know.

K&N makes a intake for the S4 that is also street legal. And they dyno test their kits to gain at least 10hp otherwise they wont put their FIPK name on it. ( i used to work there at one point).

The price in an intake kit like mentioned above, are higher but come with a carb eo number for street legality.

None of those kits above have an intake pipe, so don't expect a pretty chrome pipe. I don't think anyone makes a kit for the FC with a pipe. You gotta do what others have done and buy a universal or one from another car.

You will also have guys tell you to stick with the stock air box and put a drop in filter. Kind of not what you wanted to hear.

rx7w/yaw

iTrader: (1)

Go to schucks and for about 25 dollars you can have the same setup... ps I did it and it doesnt do anything, your intake is still restricted by the MAF. Youll find the kit will come with a little adapter/spacer plate for the rectangle shaped intake of your MAF, so 3 inch pipe to a what 1"x3" opening for your maf... If you do it dont expect any advantages except a cleaner engine bay.

Kit usually is filter, adapter plate, hose clamp. Bolts not usually included, either use stock or buy button head bolts, and if you still have the air pump you will need a small filter for it separate.

EDIT:my bad this is assuming your n/a, if your turbo idk much about what the advantage/disadvantages are.

mannyFC

Well, from what I understand, you're saying that most of the aftermarket intakes for the FC don't come with the pipe, so where did you get the pipe for your HKS intake?

FC_fan

iTrader: (2)

the stock air box with a k&n drop in is a pretty good design. it will be the same as any other pipe and cone filter. so basically it comes down to if you want your engine bay a little cleaner looking. I've read the debates, looked at the facts. you can gain hp in other places then a filter, the money to hp formula comes into play. don't do it for the "performance benefit" because it's not worth it. do a full exhaust if you want noticable performance gain, especially on an n/a if that's what you have.

Evil Aviator

Unlike a crappy Honda econobox, your car comes with a stock "cold air intake". There isn't much point in using an aftermarket intake unless you have a lot of engine modifications. You can just use the K&N drop-in filter. The aftermarket pod filters and intake pipes are really more for the turbocharged cars, and most of them require custom ducting to keep the hot radiator discharge air from getting sucked into the engine.

As for the HKS intake, I had one on my TII and it was good, but the filter gets dirty pretty fast and it isn't all that cheap to replace. I like the K&N kit better because the filters last a long time and you can clean them, but the HKS kit looks nice if you are building a show car. It works just fine other than it sucks in hot air from the radiator like most of the other aftermarket kits.

A "full" intake would include a throttle body and intake manifold, and would require an aftermarket engine management system. Here are examples of typical parts that you would need, as well as professional tuning:
http://www.tweakit.net/shop/product_...roducts_id=117
http://www.tweakit.net/shop/product_...roducts_id=105
http://www.tweakit.net/shop/product_...oducts_id=1292
http://www.tweakit.net/shop/product_...oducts_id=1567

tuscanidream

iTrader: (6)

Here's the corksport intake. http://www.corksport.com/corksport-p...e-for-rx7.html

My honest opinion is to either to buy a throttle body tube and have a shop make a much nicer intake for you... or leave the stock air box and buy a drop in filter.

mannyFC

Thanks guys, I was interested in the HKS one mostly because it said it would improve throttle response, but it seems most of you are leaning towards the K&N one. My car is definitely not a show car, so I think I'll go with y'all on the K&N. On a side note, what do y'all think about the APEX'i N1 Evo duals? Any good?

Evil Aviator

I don't think you would notice any significant increase in throttle response with any of the filter kits, although there will be increased noise that will make your car sound faster. There would be a significant increase in throttle response with an IDA throttle body conversion, but you are looking at several thousand dollars for that.

Really, the main advantage of K&N is that it lasts for 10 years or a million miles, and all you need to do is clean and re-oil it after about 50,000 miles with a $12 recharge kit. The other good filters like HKS and Apexi get thrown away when they are dirty after about 5,000 to 15,000 miles. The performance difference between the filters is insignificant.

Just stay away from cheap no-name Ebay filters. There have been reports of them falling apart and the pieces were sucked into the engine.

Apexi makes good-quality exhaust systems. The single N1 with a 115mm tip is very loud on a non-turbo RX-7, but if you like loud, then I am sure you would be happy with it. Turbocharged cars are quieter because the turbine reduces the noise by up to 40%, so they are not as loud with this type of exhaust system.

The N1 Dual exhaust with 90mm tips is a good setup for those who just want the exhaust noise to be somewhat louder than stock. The N1 Dual 90mm is shown here along with the N1 Evolution:
http://banzai-racing.com/store/86-91...i_exhaust.html

If you want a quiet performance exhaust system then go with Racing Beat:
http://www.racingbeat.com/RX7-1986-1...sts/16420.html

Hypertek

iTrader: (3)

get creative, you could probably do this
http://cgi.ebay.com/ebaymotors/3-OD-...#ht_3446wt_939

then use this for the flange
http://cgi.ebay.com/ebaymotors/86-92...item4cfa146d49

you can use that filter or get a better one, k&n, hks, apexi etc.. To me HKS is more of an exotic brand, may not be the best for some.

Here is the actual K&n kit http://www.knfilters.com/search/prod...x?Prod=57-5005
I had similar k&n kit in my 240sx , they felt the original tube was good enough, thought I think their newer stuff has a tube now.

p0tat0s

iTrader: (3)

i would definitely recommend the apexi air filter after i found a flow and filtration test that some mk4 supra guys did comparing the apexi hks blitz and k&n. you can check it out here.
http://www.mkiv.com/techarticles/filters_test/2/

Aaron Cake

iTrader: (1)

And for the record, the HKS foam filter element is a very poor filter compared to a paper or oiled cloth element. They have also been known to degrade over time, with little bits of foam ending up ingested by the engine.

Evil Aviator

That is actually an infomercial type of article that was written by Apexi dealers. Yes, it looks like a real technical article, and it has fooled thousands of people on the internet. I like how it makes it sound like the Apexi filter lasts forever, lol. Also, "wet" filters do not interfere with MAF sensors, and there is no way in Hell a filter will add 13-14hp to a typical street car.

It works just fine if you replace it every 6,000 miles as per HKS. The problem is that people leave it on the car for too long or try to clean it, which causes the foam to deteriorate. If the filter actually had problems, HKS would not have sold it for over 20 years.

BenRX

Check this out for a Air filter quality test.

http://www.mkiv.com/techarticles/filters_test/2/

ericgrau

iTrader: (1)

Filter in the box is the simpler way ya. If you get a cone you need to put a box around it or you'll actually lose power from the warm air. Not just a lot of work but also a lot of money for maybe 1 or 2 horsepower more, and 2 or 3 total in the FC NA.

j9fd3s

iTrader: (3)

they look great but they are LOUD. i'll skip the story, but there was no difference in noise with them on the car and hooked to the cat or just on the car not bolted to the rest of the exhaust

but they look cool!

the N1 single sounds better, but it doesn't look as good

Bamato

iTrader: (6)

Aaron beat me to it on this one.

j9fd3s

iTrader: (3)

if you buy the HKS filter, its got a graph of how badly it filters (vs flow) on the box!

Evil Aviator

The old 90mm duals were not that loud. Is it that the Evo 90mm dual is a lot louder than the old model, or is it that somebody made a mistake and put 115mm mufflers on an NA?

j9fd3s

iTrader: (3)

it was on an NA... it looks so cool!


the turbo does make it better

Aaron Cake

iTrader: (1)

That is true of course, but further reinforces the idea that one should just get a good K&N or other cloth filter that lasts virtually forever.

There are many products on the market from reputable brands that are inferior and have only been on the market so long because of a recognized name.