Is this a expansion tank and do i need it with my fmic?

[cpu77]

Wondering what this does and can I remove it if installing fmic.

[doublezero30]

moar cowbell. yes you can remove it.

[old guy]

moar cowbell. yes you can remove it.

LOL!! (Yes, remove it)

[cpu77]

What does it do?

[Antekaudi]

Whats the benefit of removing it ?

When i installed my boost brothers fmic i didn't touch it.

[old guy]

Helmholtz resonator. Breaks up different noise frequencies. Also mimics the volume occupied by the OEM dual intercooler set up.

[old guy]

Whats the benefit of removing it ?

When i installed my boost brothers fmic i didn't touch it.

Gets rid of excess volume in the boost track that isn't doing anything.

[Antekaudi]

But what are the benefits performance wise ?

[old guy]

But what are the benefits performance wise ?

None now that you have a FMIC.

[Antekaudi]

I will just keep it then, i still have to relocate my SAI so will see.

There is something fishy going on with forum right now, double posts lol.

[old guy]

I noticed. I keep having to delete duplicates.

[cpu77]

I will ditch it. I am cleaning out all the SAI stuff as we speak as well. I will post my questions about that in another thread:) Thanks
Guys!

[old guy]

I am cleaning out all the SAI stuff as we speak as well.

Be prepared to live with a CEL.

[Antekaudi]

Does SAI change resistance with time on the connector ? Or does it have single resistance when plugged in.

[cpu77]

Be prepared to live with a CEL.

Having it turned off via software by my tuner.

[old guy]

Does SAI change resistance with time on the connector ? Or does it have single resistance when plugged in.

The CEL isn't an issue with remove the SAI pump per-say. You can probably fix that with a resistor. It's the O2 sensor during a cold start that is going to cause the CEL.

Having it turned off via software by my tuner.

Understood.

[cpu77]

The CEL isn't an issue with remove the SAI pump per-say. You can probably fix that with a resistor. It's the O2 sensor during a cold start that is going to cause the CEL.


Understood.

So have I missed someththing or am I OK? I had my second O2 turned off on my first car.

[Antekaudi]

Thanks for info old guy. I guess cat-delete software would take care of that anyways ?

[old guy]

So have I missed something or am I OK? I had my second O2 turned off on my first car.

The SAI function is monitored by the front wide band sensor so if you only have the rear sensor written out to prevent a cat cel then no you probably are not OK.

[old guy]

Thanks for info old guy. I guess cat-delete software would take care of that anyways ?

Cat delete will take care of the P0420 code. The SAI code is something completely different. Without the SAI pump it takes longer for the cat to get up to temperature. The front O2 sensor monitors the mix entering the cat and can tell if there is extra O2 in relation to the amount of fuel. Sometimes you can avoid the CEL by always driving the car as soon as you cold start it. The longer you sit at idle the more likely you will throw the SAI code.