Should SAI breather come from main intake or have seperate filter?

[greg]

I have a BMC (i think) induction kit on my cupra with a cold air feed from the front wing. The back of the filter goes through a 45 degree bend to the MAF. Plugged into this 45 degree bend is the breather pipe for the SAI system. I have noticed on some pictures that other people have the 45 degree bend closed and the SAI breather pipe fitted with its own small filter instead. Is there any benefit to doing this as opposed to the setup i currently have?

Cheers,
Greg

 

[PhilW]

No benefit whatsover, you dont even need a breather filter on it.

 

[45_CB]

Pics?

defo no benefit though mate, get rid

 

[greg]

On second thoughts....... is this pipe there to blow the warm air from the SAI into the intake to help warm up the cat? In this case, people who have disconnected the pipe and put a breather filter on there have effectively dissabled their SAI system, instead they are just blowing warm air into the engine bay during cold starts. Definitely cant see the benefit of fitting a breather filter to the pipe if this is the case!

 

[greg]

On second thoughts....... is this pipe there to blow the warm air from the SAI into the intake to help warm up the cat? In this case, people who have disconnected the pipe and put a breather filter on there have effectively dissabled their SAI system, instead they are just blowing warm air into the engine bay during cold starts. Definitely cant see the benefit of fitting a breather filter to the pipe if this is the case!

Anyone know if this is the case?

 

[Ibiza125]

I have a breather on mine. No harm in having one. Just take out the SAI and you're dilema will be sorted out!

 

[DPJ]

Without a filter on the SAI, any crap it sucks in will go through your turbo..............

The temperature of the SAI air is irrelevant, it's the extra oxygen used that does the work.