QwkTrip

Yes, it is a leak but apparently not large enough to cause the engine to not run well. There is a MAP sensor pre- and post- intercooler so the engine ECM has no trouble compensating for losses.

There is a downside --> Unfiltered air source at a location with rather dirty air. Engine is pulling vacuum much of the time. Just something to consider.

QwkTrip

I wouldn't wish that on my worst enemy.

Sirikenewtron

The intercooler is not in vacuum

redcelica

While rarely not, there is some (small amount) vacuum prior to the turbos making boost, like at idle. I can post my data logs of the MAF readings if you'd like definitive proof.

cmbezln

Ah OK, yeah I wouldn't worry about AFR or anything since its a map based setup, I'd be more worried about the boost leak and making the turbo work harder to hit peak boost.

I have a 5.0 so it doesn't affect me, anyway....just curious. I got sick of dealing with forced induction problems after my last car.

Kenferg1

After multiple condensation issues with my 11, I chose to drill the hole as a preventative. I don't worry about dirt or debris because it isn't in vacuum very much. Even cruising, there is a small amount of positive pressure (the turbos don't quit spinning at cruise speeds) that keeps any issues with airborne contamination at a minimum. And if it is a problem the simple solution is to attach a small filter element to the CAC.

mcfarmall

I drilled a 0.0625" (1/16") hole in mine the other day. Some watery-oily spooge came out of it. No ill effects performance-wise.

gregsf150stx

"spooge"?? really?....ewe.