Eva001Ikari

iTrader: (7)

I'm sure a few people have done this but what I am looking for people who have done things like hood scoops (just for the intake). Air boxes cutting holes and running ducting. I'd like to see some different stuff, i'm actually thinking of making a small hole and getting a hood scoop fabricated or something to get good air to my intake. So lemme know what you guys got.

Chris Boots

Small intake scoop over the intake filter on my 1st gen.

Umm FMIC in pretty much all the turbo RX's I have and have owned. The stock ram air that goes from under the hood to the air box actually does work... don't really know why I see so many people remove it

1stgen8

iTrader: (13)

I molded a camero hood scoop into the stock hood and made my own headlight cover using fiberglass. I placed the hood scoop over the turbo instead of in the center of the hood like the stock TII hoods. The headlight cover is not attached yet. I just laid it in place for you to see.....got a lot more sanding to do on the hood, fenders and headlight cover.

Evil Aviator

The stock system works just fine for a stock NA engine. Once you get into the 200hp range, then you would probably want to upgrade to something bigger. A standalone EMS will allow you to eliminate the AFM and use a shorter intake pipe, and you would want the EMS for better engine control anyway once you get into the high power range for a NA engine. You would probably also want to use individual throttle bodies at that point. The most efficient inlet is a "bell mouth" inlet, a submerged "NACA" duct is the best duct, and a "divergent duct" is required if you want ram air supercharging. You can search the "" terms on the internet. (Ignore search results that yield a "convergent-divergent" duct, as you do not want this).

Eva001Ikari

iTrader: (7)

well thank you for the input, and for those of you who keep yammering on about the stock air intake system, I bought my car and the intake was already taken out and fucked up, so unless you can revert time or if you have all the stock components and are going to come to my house to install them dont nag about it.

Yes my car is n/a and it is almost at 200 whp here is the thread take a look:
https://www.rx7club.com/naturally-aspirated-performance-forum-220/my-91-n-coupe-its-nearly-200whp-856880/

No_love_for_pistons

iTrader: (4)

In fairness to the people who responded that there is nothing wrong with the stock intake, you never mentioned in your original post that you did not have it installed.... and were thus looking for an alternative.

Evil Aviator

Er, people only mentioned the stock intake because they were trying to save you time and money if you had a stock setup. No need to get all pissy at people who volunteered their time to help you and were not aware of the whole situation because you failed to supply certain details.

Tofuman FC3S

iTrader: (1)

The stock TII has the scoop over the IC, not the turbo. Looking from the front it should be on the right side.

Riz.

lastphaseofthis

iTrader: (8)

i read your other thread, you need a cold air intake, either mount the filter under the headlight or make a box and for it. i've done both, and prefer the inside the finder mount, as you get much better results, but.. it gets really dirty really fast. but cold 30 degree aimbent mornings my NA s5, would chrip 3rd, i **** you not.

1stgen8

iTrader: (13)

Yeah, i know the stock TII hood scoop sits over the intercooler but since I'm running a FMIC and never had a TII hood I decided to place my scoop closer to the turbo.


"Looking from the front it should be on the right side"........

1stgen8

iTrader: (13)

If you ever need the stock airbox parts (box, hose to intake, duct) I have everything except an extra MAF sensor. I will let you have it really cheap.

Eva001Ikari

iTrader: (7)

Look guys, I understand that for those of you giving me input about the stock system and thats all well and good but first, it isnt anyones choice but mine and on top of that, i'm not even asking what is better or anything even close. I want to see modified intakes, air boxes, ram airs, hood scoops, ducting and other stupid rediculous mods that ARE NOT the stock system. So as i am very sorry for snapping at those people trying to tell me how great the stock system is, i dont have one and i'm not getting one so dont post if thats what your post is about.

clokker

iTrader: (2)

OK then, here's mine.




Puts the filter in front of the rad so it draws ambient temp air, cleans up the bay a bit and has no water intake issues.
Can't say anything about power loss/gain from doing it but the only way my car would chirp the tires in third is if I ran over a parakeet.

Eva001Ikari

iTrader: (7)

clokker thats a nice set up, looks clean. So you had to relocate your coolant overflow tank. Since i dont have an air flow meter because of my haltech, i think i'm just going to put my air filter right off my throttle body and cut out a piece of my hood and get a small hood scoop and put right over it.

Oh yea, in case anyone is wondering my car was at 175 whp on the dyno before John opened up the hood and moved the intake pipe up over where the hood would be when its closed. Once he moved it, i got the 182.5

EnjoiPugs

hehe, this is what I was thinking about doing for my friend. I am keeping my stock setup until I go turbo. But, my pal already replaced his stock setup and I think this is a better one. BTW I really like that red UIM job you did. And nice engine bay, very clean car man. I can see the external mods, but did you do anything on the inside of the motor? Sorry if i'm heading away from the thread topic lol.

rotaryracer1

iTrader: (1)

is your intake manifold got that red wrinkle finish like a subie STI?

Twins80s

iTrader: (3)

this is a large intake modification

rotarygod

iTrader: (1)

I've been running around with a few different pressure taps in various places in the intake system with a magnehelic gauge that I move to various ports. I've been watching the pressure drop in the intake system. Specifically those from the air filter and also from the air flow meter. The results have been interesting.

The afm shows a steady 1/4 psi pressure drop at idle and then it stays steady as the rpms rise. To a point at least. I need to log it all better but somewhere after 5K the pressure drop from the afm really starts to climb. Yes it is a restriction. This is on a stock '90 GXL that I bought this year btw.

Why am I mentioning the afm as a restriction and how is it relevant? It's simply because there is a far larger pressure drop from in front of the afm to behind it than there is from before to after the stock paper air filter! I've tested it and still am. The stock intake system isn't really holding anyone back who is at stock power levels. It's not perfect by any means though and I'm sure once you hit 200 hp or so it starts to play a larger role.

A cone filter may technically be able to flow more in a static test but what something can do and what they actually are doing in practice aren't always the same thing. A cone would pick up hot engine bay air but then again the stock air box heat soaks pretty bad. You wouldn't think plastic would but it gets pretty hot in there. It can't be as hot as radiator air hitting the filter directly though.

My recommendation is to start where the biggest issues are first and that is on the exhaust. Worry about the intake later.

texFCturboII

iTrader: (17)

yes.

Eva001Ikari

iTrader: (7)

my exhaust system is fine, i'm running racing beat true duals all the way back.