mazda v

Alright so i put 3 inch everything on my exhaust. and when i took of the old midpid with the catalytic converter ther was a flange looking thing with 2 screws. pretty small like 1 to 2 inches , and it connected to the precat,, so when i put on the midpipe there was no hole for it. what is it? i was thinking it was the over heat exhuast thing that the car comes stock with. pls help!!!

rynberg

Are you referring to the air line that attaches to the stock main cat? If so, the midpipe doesn't need an air feed. Just plug the old line.

You do have an aftermarket ecu/boost controller, right?

mazda v

uhhh i guess so how do you plug it up..no, im getting the ecu soon though im not gonna drive my car much or push it. but what does that air line do??i see the piping goes up somewhere to the engine but i cant see where

911GT2

That line pumps air into the main cat to make it work more effectively at low rpms. The midpipe you have on there now is not a cat, so it doesn't need the air line.

Please do yourself a favor and don't drive your car until you get an ECU and a boost controller. I won't even get into the reasons why, search if you need them, just don't drive it.

felix_is_alive

if you do drive youre car please ,look at the boost ,i dont think that getting a full exhaust without any type of boost controling device ,or without a engine management of some sort is a good idea , you could harm youre engine

mazda v

should it interfere with the boost becuse my boost always says im below zero. my bov goes off still. i have a manual boost controller but what is it gonna help if its already stock boost.

felix_is_alive

huh ???....what are you asking here ??, i am sorry i dont understand

mazda v

so i should just ge the greddy e-manage and i should be fine?

Mahjik

iTrader: (1)

Even at the same boost level, you will have more airflow and generate more power. Boost level alone does not determine who much power you car is making.

mazda v

ok mahjik so i should go with what ecu??

felix_is_alive

yes yes yes ...do not run an open exhaust without a ecu, watch youre boost also

felix_is_alive

try the fc comander from apexi

alberto_mg

Click on the links that have already been posted to answer your question. Here is another one:
http://www.scuderiaciriani.com/rx7/stages.html

Search button works well also if you want to learn about the different ECUs and make an educated decision as to which one would fit your needs. Your question about ECU is very open ended and depends on your mods and the goals you want from the car.

Be careful though. All it takes is a quarter throttle to get the car to hit 15+psi worth of boost which will blow your engine pretty quickly. A full exhaust the way you did it is the quickest way to a blown engine. You might want to learn a bit about modding the car b/c if you don't know what to get and in which order to do it, you will blow the engine real quick. rotaries require a knowledge in order to mod.

Mahjik

iTrader: (1)

It depends on the goals for your car and your wallet (how much $$$ you want to spend).

You can pick up an Apexi Power FC, however, without a proper tune you are just asking for trouble (that and a new motor).

For starters, I would suggest picking up a Pettit ECU. This will allow you to increase boost and gain some good power. If down the line you want more out of your car, the Pettit ECU's always resell very well.

Keep in mind that an ECU alone may not solve all your problems. If you experience boost creep, no ECU or boost controller can help.

rynberg

Wow, and I added that ecu comment as a second thought.....

You should have done a little more research before putting the midpipe on. IMO, most of the forum treats the midpipe mod too casually anyway.

I strongly suggest you put the stock cat back on until you become a little more knowledgable about the car. You are going to blow your engine if you're not careful.

mazda v

wow that suxs .i dont have money for the apexi ,,so will greddy e-manage do for now?

rynberg

No. Get a Pettit ecu like Mahjik told you.

fd3s_rx7

iTrader: (13)

I have a petitt ecu on
boost controller, dp. exhaust, intake and it works great...

mazda v

ok great guys luckily i bought my 93 civic hatchback.so i dont have to drive my car..tnx for the info fellas..and if you guys know where i can find a tuner near, oxnard,Los Angeles, or ventura. or santa barbara..maybe mariahmotorsports,or xs engineering.??