Cobra_R

The 88 RX7 comes with one right, but you don't need it right? So you can just take it out right? Taking it out isnt going to have a negative effect will it? Also where is it and how do i take it out? What does it do?

Cobra_R

i dont know much about engines if you havent already noticed

WAYNE88N/A

dude,read everything you can about your car...this forum's a good place to start. You don't HAVE to have the air pump to make the car run, but it's usefull for opening your 5th/6th ports if you have a modified exhaust and don't have much backpressure anymore...

gergrx7

the air pump is used to force air into your exhaust. and if you haev a cat the if will cause it to clog it up. and for a n/a it is used to open up your 5th and 6th ports. it is easy to take out i think its 3 12 mm bolts and then then belt. people take it off for more room in engine bay compartment and for less weight.

beefhole

iTrader: (29)

Bottom line is your pretty much NEED it to pass emissions.

Turbonut

iTrader: (1)

https://www.rx7club.com/showthread.p...hreadid=249071
Also a dual pulley on the alternator is recommended so you'll have 2 belts turning the water pump.

patman

iTrader: (3)

yeah you need it or ur cats will clog, which is bad..big loss of power and maybe a fire...if you remove the cats then you dont need it on a 88..it doesnt open the aux ports on s4..but backpressure from the cat does..so if you remove it you have to ficure somethign out...best thing is just to leave it all in there unless you know what ur doing.

pat

NZConvertible

Only S5's use air pump pressure to open the auxiliary ports. S4's use exhaust backpressure.

dorifc3s

crap...so what happens if i have 2.25" straight piping?

beefhole

iTrader: (29)

You may or may not have the back pressure to open your ports (judging by your avatar you have an S4). You will have to either wire them open (hurt low end power) or rig up an electronic method to open them.

dorifc3s

crap but does this at all give me more low wnd? thats what i'm lookin 4 cuz i autoX.

ilike2eatricers

If your ports are working correctly you wont have "more" low end, just the amount you are supposed to have stock.

patman

iTrader: (3)

if your ports arent working..which chances are they arent without cats..you have about 30% less high end power. ports arent for low end..they dont open until 3800 rpm.

there are many many ways to make them work without cats or airpump. do a search and read up on them. i myself once did a post on the easiest, cheapest way, but there are lots of others.

pat

ilike2eatricers

Check the archive for electronic aux port activation.

Aaron Cake

iTrader: (1)

The ports are there to MAINTAIN low end. If you wire them open, you gain nothing up high, but you lose quite a lot down low due to the increased overlap, longer intake duration and velocity charge velocity loss.

If you keep them wired shut, then you have a wonderfull low end until about 3500 RPM where the engine falls flat on it's face because it can't get enough air...

shiftnmadkwik

get rid of the air pump, get the kit from fcstore which comes with the pipe/resonator and acv blockoff and drive mega fast... just make sure you have a few bucks to tip your mechanic so you can pass emissions

shiftnmadkwik

check with grease if they are opening