PT DAVES,Air intake looks great,but

[old head from phila.]

Dave;You know i think the world of your intake,I was all set to start making one till i read Dalite's post titled "Stock air intake testing" read it and post your thoughts OLD HEAD

[PT-Dave]

Old Head,

Yes, I say Dalite's post. While I'm sure that the temps are within a couple of degrees of the ambient air temp with the stock setup, you can't hear the turbo or pop off valve with the stock setup like you can with mine. With the setup I am currently using, the intake tube from the cowl is COLD to the touch after a run or a long drive. I am assured of getting the coolest possible air to the turbo this way.

[Dalite]

And let me confirm that I believe that you do get a volume increase in the actual amount of air entering the turbo wuth a cold air intake; just by virtue of the amount of filter exposed to the air. My main point is that the "cold" part of the cold air intake is likely to be less noticable or beneficial on the turbo as opposed to a normally aspirated model. On the non-turbo model, the air getting to the throttle body is the same temp as what it is being fed. The Turbo makes heat as a by-product of compressing the air before the intake. The intercooler / charge air cooling system does what it can to remove as much heat as it is able to.

Please understand that I am making assumptions based on the service manual and my limited knowledge of physics.

FWIW, I will probably look further into a cold air setup, just for the volume increase and being able to hear it. I had a K&N FIPK Gen II kit on my 02 model PT Touring Edition, and I do miss the sound. When they come out with a setup for the GT, I will look into it.

At this point, I am playing around with mods that are low in cost and make use of what is already there in the stock configuration. In many ways, this is a far greater challenge than adding the bolt-ons.

The intake air from the cowl definately has the potential for lower temps due to volume and velocity. I imagine that there is potential for cooler air coming from the charge air system when being fed by lower air temps.

As soon as I get some kind of data logger to measure the actual temp entering the throttle body, I will have a better way to judge.