MAX-IMAL

I bought the rb headers but i still don't understand soemthing, ok i want to remove the air pump, of course i won't need it after i remove the cats, but i was reading some other threads that the sixth port it will not open completely because of that and it will loose power ?
Am I wrong if not how can i fix that??

Thx

MAX

1987RX7guy

iTrader: (3)

What year FC do you have?
For 86-88 you can remove the air pump and the auxilary ports will still work
For 89-91 you must leave the pump on for the ports to function.

MAX-IMAL

88, so it'll still work w/o the air pump???

1987RX7guy

iTrader: (3)

ok in the S4 cars the air pump does not control the opening of the ports there is a vaccume line on the split air hose I think that is what it is called that creats the pressure for the ports to open. If you get the full system like i did form mazdatrix it comes with an adaptation to the header that hooks up to a vaccume line that replaced the split air tube and the Air Control Valve. With my setup I also recieved a block off plate for the ACV but this can be purchased seperately.

riptyde

iTrader: (5)

If you remove the cats, no. You'll have to wire them open or come up with another method to get them open.

1987RX7guy

iTrader: (3)

I hope you got the header with the adaptation on it or else you will get screwed in the low RPM range. You will lose a lot of power and gain nothing.

MAX-IMAL

So, w/o the cats won't open?

MAX-IMAL

I have the rb header n rb presilincer

riptyde

iTrader: (5)

The aux. ports run off the small pipe that comes out of your cat which makes backpressure and produces about force to open your aux. ports. If you take off that cat, they won't operate.

1987RX7guy

iTrader: (3)

So, w/o the cats won't open?


the split air tube hooks up to the ACV and the ACV hools up to the Air Pump so no pump ACV don woik ACV no woik split air tube no WOIK. I have not cats and my ports still function. I have the Mazdatrix dual exhaust which is the same as you except I have two pre-silencers and it is uncollected.

1987RX7guy

iTrader: (3)

http://mazdatrix.com/r-8.htm

riptyde

iTrader: (5)

1987rx7guy did you get "H" the presilencer because that gets the pressure for the aux. ports like a cat.

MAX-IMAL

ok, but with just the header and presilencer it'still work ?
Sorry for asking again

1987RX7guy

iTrader: (3)

Riptyde I have the MT Duals on the header which is a Racing Beat one they have made an adaptation for both an O2 sensor and a smaller fitting where they have a small tube that comes with the kit and that takes the place of the split air tube and provides the pressure.

Max-Imal I think you will probably need to wire the ports open even if the air pump does not operate them. One thing I can aske you to do to verify is to check the header you bought and see if it has two wholes on it one should fit the O2 sensor and the other the one which is in question should be a small one if you do not have this one than I doubt you will be able to operate your ports without some thing else. I do not know what riptyde means by the H in the pre-silencer either.

MAX-IMAL

Yes, the header come with the O2 Sensor whole , but that's it, the other one it's on the pre-silencer kind like a thin tube coming out of it, i think that's the one you're talking about

1987RX7guy

iTrader: (3)

Well I think you are going to have to find yourself some high temp tubing to put on that thing and hook it up to where the split air tube's vacumes line hooks up to. Do you know where that is?

MAX-IMAL

no

MAX-IMAL

Hey are you from laredo right?

1987RX7guy

iTrader: (3)

yeah why?

MAX-IMAL

me too

1987RX7guy

iTrader: (3)

Well the little tube where it hooks up is kinda hard to find with the old exhaust still on there but once yu get it off you have a lot more space to find it. Let me think about how to explain it to you.

1987RX7guy

iTrader: (3)

What color is your FC? DO you have an instant messenger I could talk faster to you over that

MAX-IMAL

Marron, yes andres_valle50@hotmail.com

1987RX7guy

iTrader: (3)

hang on bro let me turn MSN on

1987RX7guy

iTrader: (3)

turn on your MSN messenger