Airbox vacume leads

[NeuSpeedGTI]

I'm exploring the possibility of an aftermarket cold air intake filter and do not want to drill my stock air box.

Concerns:

Other than sourcing an adadptor, there are two vacume leads which come from a temperature regulator on the top half of the air box.

The lower vacume lead I understand regulates the amount of warm and cold air comming into lower side of the air box with the flap mechanism over a pipe leading back into the car (warm air I assume) and the cold air essentially comming from the front of the air box. The air then accumulates in the bottom of the box, feeds up through to the top half of the air box and into the the AFM.

Below 20deg the cold air inlet must be closed.
Above 30deg the warm air inlet must be closed.
Between 20deg and 30deg the flap should be positioned half way.

Q. What are the advantages of letting warm air in? or why in fact would you go to the trouble of having this mechanism in the first place?
Q. If you did have an aftermarket air filter how would you or would in fact you even need to get around this?

The upper vacume lead from the top half of the airbox connects to a t-join with fuel pressure regualtor which then feeds into the throttle valve housing. I understand the fuel pressure regulator is controlled by this.
Q. HOw do you get around this with a an aftermarket cold air intake?

Thanks again...

[mikinoz]

On my car with mkii digifant and a pod, I have the fpr direct to the throttle body and the other hose is still conncted at the trottle body but has been cut and plugged. I'll try to find a pic.

[NeuSpeedGTI]

mikinoz... thanks, makes sense.. If you could find a pic that would be excellent.

And the lack of warm air is not a concern with the pod?

[mikinoz]

Not my image, but it gives you the idea.

I don't really know if it is an issue as I have always had a pod since I had it. A bracket to hold the air flow sensor is a must, so the pod does not flap about.