fc3sdrifting

ive been saving up for an rx7 all summer and ive been wanting one for over a year now. i think it looks like ill be getting a 1990 gtu from a rotary mechanic in late sept or early oct. i have some questions that i kinda want to know now.

what can i do to get better gas milage out of it? i dont have emissions testing here so if taking off the cat is one of them then tell me. also does that give a big power increase if i take the cat off and if i have the racing beat muffler? how much louder is it than stock? if its stock what kinda gas milage can i expect?

i really want a TII hood for it, i think i can probably get one for a good price from the guy im buying it from. but i heard some bad things about putting one on an n/a. good idea or bad?

thats it for now. after i buy it ill have more questions.

beefhole

iTrader: (29)

If you can get away with emissions, then you should get a midpipe/presilencer. You should gain some power that way. Racing beat exhaust is close to stock noise level (from what I've read). There is nothing really "bad" about putting a T2 hood on an NA except that some people may think you are being "ricey" for putting a turbo hood on a non-turbo car. The weight savings is beneficial though.

marlaman

In my opinion for an n/a if your hood is aluminum stick to it unless you really really want to save weight (aka you're getting a CF hood)


At higher speeds your hood will rattle and shake a little with the TII hood as opposed to the n/a hood stays quite a bit more stable. and the airflow for a TII hood really only helps the intercooler (i think) so sticking with an n/a hood is in my opinion a good deal. plus instead of getting a TII hood you could buy an s/afc instead and get more performance. totally unrelated i know but that's what i think.

good luck on the purchase and let us have pics when you get her

Matt

tong53

the safc will help with gas milage as you can lean it out a little since the NAs run rich

fc3sdrifting

thanks. except i dont know what htat is. how much does it cost?

marlaman

'bout 300 bucks. saves you that much in gas over time too. so more or less it's an investment. plus if you choose to do other upgrades (and most likely you will--it's contagious with an fc) it'll help you a lot down the road.

It's an aftermarket fuel controller that lets you adjust how much gas you throw into your engine, rather than it being controlled just by a little screw type thinger.

I still need to get my hands on one but one project at a time.
Matt

Falcoms

Would it be considerd "Ricey" if I were to use a T2 hood, either CF or stock, to force air into a collector and into an air box on my N/A?

marlaman

i think the real question is do you give a damn what everybody else thinks? do what you like. it's your car. just make damn sure there is no turbo badging on her.


Matt

fc3sdrifting

im not worried if someone thinks my car is ricey if i put a TII hood on it. i was only worried if it will do anything bad to my car if i put it on. i dont htink many people know anything about these cars, so if i put a TII hood on it nobody would think what a ricer, he doesnt even have a turbocharger, unless its another rotary enthusiast. im not trying to make it look like i have a turboII, i just really like the look of the hood scoop, i think it fits the cars looks.



safc again. what does it stand for? do i basically plug it in and your done, or do you have to play around with it? either way if i get it ill be taking it to the guy who ill buy the car from.

marlaman

ok your 1st part of the statement. i was refering to another members post. not yours.

2ndly. s'afc=super air fuel controller. get more info here. http://www.rx7store.net/index.asp?Pa...ROD&ProdID=251
this page is a link to a store that carries it, gives an overview of what it can do.

Peace,
Matt

fc3sdrifting

i know you were. i dont know why i quotted there. i guess i forgot to say something like, yeah i agree with you.

thanks for the link

SonicRaT

iTrader: (6)

There's too much heatsoak/not enough air on the tII hood to make good use for an intake, that and there's so little room that you wouldn't be able to fit much in there.

fc3sdrifting

hmm. im not wanting it for air flow to the intake. i just like the looks. as do many others.

SonicRaT

iTrader: (6)

Sorry, was answering this:

fc3sdrifting

ok. i messed up somewhere up there too and probably confused whoever it was...

i looked at the safc on that link. do you hook it up or whatever and does it stay in your car? and can you monitor anything on it? does it only control fuel or does it have other fucntions.

and this question is a little vague because of different factors, but what fuel milage can i expect from a stock 90 n/a, and from one with the safc? also will the safc give me more power when its still set for better fuel milage, or can you easily set it for power one day if your gonna autox or something then switch it back?

SonicRaT

iTrader: (6)

A stock s5 n/a usually gets anywhere from 22-25. If you modify it a bit, and free up the intake/exhaust/tune it, you can get it up to 30-32 pretty easily. The S-AFC stays in the vehicle, you wire it and splice it into your ECU (Emissions control unit, engine computer). You then configure it for your car, and enter corrections based upon RPM (by percentage), which manipulates the reading your ECU see's on the air intake, which will allow you to control how much fuel is injected and when. It has a few monitoring options, such as RPM/throttle position/airflow/corrections, and some even have extra's where you can monitor voltage off a sensor (1-5v?). On a non-turbo, you can pretty much set it and leave it, and you'll get decent gas mileage, and still have the extra power of a more efficient mix.

fc3sdrifting

thats awesome cause for some reason i thought s5 n/as got around 17mpg stock. thats what i told my parents (who are helping me buy it or at least insurance) so that will make them happier too so better chances of getting the car.

SonicRaT

iTrader: (6)

Yeah, if you don't keep up the maintenance/etc, it'll drop off pretty quickly. My plugs are about 30k miles old, fuel filter is stock, TPS is out of whack, I've got vacuum leaks, and my o2 sensor is shot, and I'm getting about 14. Once I fixed all of this, I was getting 29-31mpg on each tank on mostly highway. About 27 with mixed.

DerangedHermit

Does your car even run? Damn...

SonicRaT

iTrader: (6)

Sometimes I wondered. That car was getting so terrible of gas mileage it was sick. Only about 220 per tank.

7th Heaven

So from what I've read so far, the CF T2 hood for sale on fc3s.org CAN fit an N/A? I really, really need to get rid of my steel hood, I swear it weighs just too goddamn much.

My MPG is pretty shitty too, seems like every 7-10 days I need to refill her up to full. I assume its the fuel filter, I have not changed it yet... I'd like to do it myself. Are any special tools needed, and if anyone could tell me where its located at, it would help. Last one I did was on a '94 ford ranger, needed some fancy tool to get the hoses off, and it was right under where the frame is, so it was easy access.

SonicRaT

iTrader: (6)

It's right on the frame on the drivers side. It's got those stupid hose clamps on it that you just need a set of pliers for, and it's held in by two 10mm or 12mm, then it comes right out.

powrdby13B

none of my turboed cars have a turbo hood. I like people to think I have a NA... but then again, I have spearco FMIC's
As for the intake, just get the bonez drop-in.
Oh yeah - intake and exhaust will make you faster than most of the cars at the school.
Look in the archives for free mods to get you going. My first car ran a custom DP to a MP to stock mufflers... and I took the hood off to save the 50 lbs or whatever... Then I bought some 15" konigs off a friend that didn't want um anymore for $1 and then I sold my rims and realized thats where the money was. Enouigh rambling.

DerangedHermit

https://www.rx7club.com/showthread.p...l+filter+write

It's covered in the Hayne's manual also.

SevenDreamz

My gas mileage is pretty shitty to I have to fill up like evry 3 days, I mean I have quite a few mods but damn the 7 is costly. Should I check the O2 Sensors or what?