mor

Hi guys,

I'm getting my M2 Stage 3 ECU and midpipe soon so I can get rid of my airpump. I'm considering doing the seq. simplification as well.

Anyways, will I be running too rich with the airpump removed? Any way to control that besides the ECU? I think the M2 ECU will already be sorta rich, I don't wanna make things worse.

~mor

inis

normally, if you remove it and you are stock, you should run lean as hell. im guessing you will be ok. im also guessing M2 predicts that kind of **** when they program the ECU.

mor

Hmm...I thought removing it at any point causes idle to be rich?

Anyone have a setup similar to mine and have some suggestions? Should I just leave the air pump on?

Thanks inis for responding.

Fd3BOOST

iTrader: (7)

M2 Recomends against using a midpipe with that ecu.

Wargasm blew an engine way back when doing that.

bureau_c

Removing the air pump will not make you run lean! It will make you run rich at idle, although there's some discussion as to why, but that is what I have observed. Any other effects are sort of foggy, but certainly, idle is richer without the pump.

jds

JhnRx7

iTrader: (12)

i have removed mine and it made me richer at idle.

Cihuuy

Where did you hear that?

im running rich as well wivout the airpump...

vel525

iTrader: (4)

hey what does a rich idle sound like. sort of rough? cause i dont' have an air pump either. i was told the only major concern is that my main cat would eventually get clogged, but i was planning on going with a midpipe once i got a pfc so not too worried.

r0t0r-rooter

I believe Ludeowner had bought a m2 ecu & was planning on using it with a midpipe. He should know how well it works...

mor

I've talked to M2, the reason why they say no midpipe is because boost creep.

I have a ported wastegate so hopefully I can control the boost. They said if I can then the midpipe is fine with their ECU.

inis

i was aware that it runs rich at idle. I just heard (and this might not be the case on his car) that if you have a downpipe, cat-back, and then throw a mid-pipe on, you will lean out when you get on it. I know mine does a little.

bureau_c

inis,

When you said "normally if you remove it you run lean as hell" I assumed "it" was the point of the original question, the air pump. If you were including the midpipe in the air pump removal process, then sure...you will definitely run leaner as it flows a lot more air that way.

jds

inis

ya, i should correct myself. Just taking off the airpump would do anything. i meant by having a free-flowing exhaust it would lean out.