SupraKiller

I am getting a fuel cut defenser for I cant afford an aftermarket ecu for the time being. Now I was just wondering how much it costs to buy and what its function is. You see does it trick the ecu in spraying more fuel so you dont get fuel cut?

BlackR1

I've never heard of any RX7 guys getting FCD's. That's a BPU Supra thing.

The reason FD's experience fuel cut is because the injector duty cycle is nearing 100%. Our injectors and fuel pump are not as big as a Supras, so if you get a FCD (do they even make one for the FD?), to compensate for overboosting you will not have the fuel to support it...aka you'll blow up.

Why would you need an FCD?

SPOautos

well a fcd wont do what you need. You could add 2 more injectors and get a hks aic (additional injector controller) BUT, you could get a used upgraded Pettit ecu for about $500. Thats about half the price of a aic and injectors. Hell for the price of a new aic and some injectors you could buy a new pfc

STEPHEN

SupraKiller

Well at times I feel fuel cut when I go past 4000rpm, I have the midpipe on and I PLAN to keep it on because I just got new turbos put in and I want to bring the engine temps down, for longer engine life aswell as prevent back pressure which produces heat and bakes the turbos and the engine. Along with the midpipe I have a free flowing catback and downpipe. So I notice that when my car spikes for that 1 second to 15 pounds it will cut fuel. The wastegate closes at 10 and keeps there till red line.

BlackR1

you need to port that WG, do something about those pills...something to control that boost. You're gonna blow up if you keep running it like that

SupraKiller

I have a catalytic converter, I was told by rotary motorsports that it is no good because there is a rip in the filter inside it upon inspection with a light through the hole into the converter. I find that strange for that car had the converter on when it passed air care, if the converter was no good, wouldn't it fail air care? i do have a downpipe so I will most likely get the main cat put in but can my turbos life and engine life be cut in half if I do decide to put the catalyatic converter in? I have the downpipe already installed. And if it were clogged there is no way it can damage the turbos and engine if I have a downpipe correct?

user 84205

im pretty sure with FCD, if you get it from Japan it has a speed cut in it too.....

SPOautos

Here is the deal. Your set up is already borderline lean. A FCD will stop fuel cut but isnt going to add fuel to your system. You need more fuel for those boost levels. For the price of a FCD or a HKS AIC either one you can buy a used upgraded Pettit ecu. If you shop you can find a used one for $500. That will take care of your fuel cut problem and supply enought fuel for the boost your running.

That is the cheapest way to get your car right at those boost levels.

You can make some manual boost controlers for $20 and just turn the boost down.

Your waistgate starts to open at 7psi of boost and at your boost levels is open all the way, not closed. The prob is your wg isnt large enough to vent all the air.

Get a used Pettit ecu

SupraKiller

what part dont you guys understand? I am not running on that boost I am runnin on 10 pounds to 11 pounds maximum, I spike for a second exactly a second to 15 pounds before it goes to 10, so does this clarify that I am not running higher than stock boost? jeez christ some people cant read before they say ****!!!!

black99

Actually they only cost about $5.00.. But this is what he should do to try and keep the boost down, even spikes.

Suprakiller: That 15psi(even for your exact second) can kill your motor if you're not careful. Listen to what people are telling you. Get either a upgraded ecu or a cheap boost controller. Ditch the FCD.

SupraKiller

I am sorry but black 99 a split second spike will not kill the motor, why because it takes more than a slit second for Ecu to realize ohhhh **** I am over boosting!!!!! so no I am not concerned about the motor blowing up because It wont, and Rotary Motorsports and their mechanics say it wont, you wont me to put trust on a bunch guys on a forum? which half of them dont even know what the **** they just typed? no it wont blow up I just dont like the fuel cut I experience when I OVER BOOST for that split second, so thats why I want a Fuel Cut defenser. Oh by the way back to my comment earlier that some guys on here type **** and they dont know what they are ****** talking about, one guy says that they dont make a fuel cut defenser for the Fd, fuckk buddy I JUST phoned HKS today, and guess what? they do make one for our car!!!

SupraKiller

look man get your wording straight, its not a creep its a spike idiot!! **** man telling me I cant spell, when you dont know the meaning of words you put in your sentences, oh yeah your 2 cents shove them in your *** fagget

KILL ALL RX-7'S

suprakiller you a ****** funny but in all seriousness 5 post on one page! congrats we have a new record

SupraKiller

Hey, You better watch it man, the flame police is already on you, hey buddy

KILL ALL RX-7'S

i don't give a shiznit let em try

KILL ALL RX-7'S

oh **** that was a low blow, i smell a flame war coming ahhhhhhhhhhh my favorite

SupraKiller

let who try, you better change you name because that name doesnt go very well with reality my friend, 7's are hard to kill, so beat it haaaa

black99

A FCD will not give you more fuel, adjust your timing, etc. A FCD is just a waste of $100.00. Why not spend $300.00 extra and get an upgraded ecu and be "safe"? "Rotary Motorsports" must be run by a bunch of 12 y/o's..

SupraKiller

No Kill ALL rX7'S I think there will be a flame war against you man, now that sounds fun yipppppppi

SupraKiller

Black 99 I dont know who to listen to here, no anyway I dont want to get into this fuel cut defenser matter any longer, I am going to get on monday anyway, oh yeah, do you know where I can get an ecu for 300 american from around here? a name or email of sombody who has one would be nice, any connections?

Silver93T

Ok, you come to this forum looking for advice and you act like a jackass... Do you really think someone is going to want to help you if you behave that way? To the point, a boost spike CAN pop your motor, and so can hitting fuel cut. And just because you can keep the boost down doesn't mean you are safe. You can have more airflow at the same psi. The stock ecu doesn't know and can't compensate. Eventually you will blow up. Either mod the car the proper way or don't do it at all. $3000+ for a new motor isn't gonna be fun and you'll kick yourself for not wanting to spend the $500 now. Also, if you're wastegate is not ported I would not run a midpipe. The only reason you are getting away with it now is because you haven't opened up the intake.

Silver93T

What kind of ecu are you looking for?

pp13bnos

iTrader: (1)

This is just to funny....

SupraKiller

a used ecu that can compensate all the mods I have on the car!!!! at can handle 15 pounds of boost!!!!!!!!

user 84205

Suprakiller.... Calm down....This is an information site...If you know everything then maybe you shouldnt ask questions, people are trying to help, its constructive critisism.....this is a FRIENDLY reminder......