Air Pump removal

[John RX7]

Is removing the air pump a good or bad idea?,i was going to blank it off with some blanks,but i have been reading a couple of threads and people have removed them for more space,this would no doubt effect your emissions,would you still pass your MOT,your thoughts guys
 
john

[philiwily]

You need it if you still have a cat.

[John RX7]

could i change to a decat,iam not sure if i have a cat

[philiwily]

Personally I wouldn\'t fit a decat without a programmable ECU, but some people do. Without the cat as a restriction the turbos tend to over boost.

[Aubec]

and overboosting leads to detonation, which leads to big bills :O

[John RX7]

so should i just blank it off then

[philiwily]

I would do a lot of homework before fitting or removing any engine parts.
There are lots of things you shouldn\'t do until you do another thing first and you cant do those until you do something else first.
Start off with good quality HT leads, vacuum hoses, viton valves, fuel filter and stuff like that.
I know its tempting to pull it out, Iv\'e been there:Giggle
Or you can take your chances, others have:2Rolleyes

[John RX7]

have you got a guide possibly or something like that to point me in the right direction

[nuki]

If you are going to remove the air pump from the exhaust system then make sure you have the supporting fuel/ecu modification to deal with the change or you will most certainly cause side affects that can no doubt cause engine failure.

 
If you do decide to physically go de-cat you will intern free flow the exhaust system by removing the cat therefore turbo spool is quicker and the fuelling will defiantly need to be adjusted to suite unless you take the risk of detonation and a nice rebuild invoice.

[nuki]

Also if i remember correctly if you remove the air pump on the Stock ECU you will get a nice attractive red (HEAT) warning light on the dash.

If you do remove the air pump you will need the required Blanking Plates.
DM Motorsport on the forum sells them as a kit...
They also sell the replacement free running pulley which bolts in the place of the air pump with a free spinning bearing pulley which I believe lets you keep your current size belt.


Or you can run a Greddy oversized water pulley kit to run on the outside of the water pump and totally eliminate the air pump.
This comes with Alternator and water pump pulley + shorter belt.
Hope this helps.

[John RX7]

yeh thats helped loads,just another question?lets just say i blank off the air pump without removing it do i still need to get a shorter belt and a ECU,
 
could somebody give me help on what ECU to look for

[FD3S Efini]

you wanna look for an Apexi Power FC mate there expensive but a hell of alot cheaer then a rebuild plus can easily be remapped if you decide to change your setup or add a few mods, but you have to get the one that is designed for your car if you post what year yours is im sure someone will tell you which model you need
 
Kris

[Aubec]

If you just unplug the airpump you can leave it on there - you\'ll not need a belt then.

If you remove your cat, as they say above, get an ECU thats mapped to fuel for the increased boost.  Apexi PowerFC is the most sensible option, as its easily mapped and remapped, and the Commander gives you a lot of local control to tweak settings.

A cheaper option would be to grab a KnightSports or similar \'chipped\' ECU that\'s running a map appropriate to your mods - but that wont be flexible and you\'ll not know 100% what you are getting.

[John RX7]

well that was on my to do list so maybe removing air pump a good idea,must say thanks for the help really gave me an idea on whats what

[John RX7]

http://www.nengun.com/trust-greddy/pulley-kit
 
are these the pulleys i will need