Hi guys!

So, I finally did my intake yesterday! I ended up using 3in polished stainless steel mandrel bends (a 45deg & a 90deg joined together with a red rubber 3in to 3in coupler) It works really well & it looks OK (I'll take some pics in the next couple of days) but I have a question...

On the rubber coupler/elbow that's connected to the TB, there are 2 hoses. I know the bigger of the two can be removed & fitted with a breather filter (correct me if I'm wrong) but what about the smaller one that connects to the top of the block (I think)? Does it have to connect to the intake piping?

The reason I ask is because I have a spare 90deg bend that I'm tempted to use to replace the rubber coupler at the TB but I don't have the tools to weld new fittings for the 2 hoses to the piping.

Any help would be great!

 

It's the other way around with those hoses. Big one must stay, small one can go.

 

The big one can be removed from the intake piping so long as a small breather filter is fitted to it, can't it? What purpose exactly does the smaller one serve? Can it safely be blocked-off?

 

You say:
I reply:

Read my response again please...

range">Small one is for breathing of your engine. It gets some oil and hot gasses out of the under valve cover. It(small hose) can be safely removed. Other one must stay! It doesn't let anything breath!

 

The big one is for Idle Air. I removed mine while the car was idling and it immediatley died. laugh.gif:

 

Yes, you will need to keep the big one but you don't have to keep the small one. You can put a filter breather on the crank or you can use a catch can.

 

So what did this guy do? It looks like he put a small breather filter on the bigger one...


That's what I was hoping to do too. Less mucking around with the piping.

 

it's a korean tib, so it's probably different with some things. I know for sure that they have no MAFs, they use MAPs. My XD is MAP based and I don't have any piping coming off from nowhere.

 

I also have a MAP based car, so will the setup above work?

Java, you said that it just stalled when you disconnected yours... Is that because you blocked it off, or did you litterally just disconnect it from the intake piping?

 

Yes that will work, and I don't think blocking the small hose will hurt either. As long as the large hose can still suck clean air it will be fine, as it is there to allow the car to idle when the butterfly is closed. The small hose flows from the intake to the engine under normal use, but under high load the pressure in the engine increases and the flow reverses so it vents back into the intake, but I don't think that blocking it would hurt.
Good to see that you're finally doing your intake too eek.gif It's about time laugh.gif: