De Snorkeled! Does it negatively effect HP or torque?

[mts]

I did my 2004 S. I remember it being a bit scary to get it to come loose though.

[backman_z]

I was also very concerned about breaking the vent to get to the snorkel. I had to pull and wiggle over and over again, but eventulally, it came out.

The area inside was so small, that I could not get a good grip on the snorkel. So, I clamped some vice grips on, and it came right out.

[Pianohawk]

De-snorkling coupled with building a hi flow air intake = deep, amazing sound.

[jaykay]

Lets leave out intake tract acoustics and ECU response to airflow changes which affect performance. Assuming that these that these factors are not affected by de-snorking, we now basically left with flow considerations. A normal Boxster engine has to draw air in like a pump. Flow losses upstream of the engine will reduce the flow rate at a given rpm. Fluid energy is lossed by having to make through obstacles. Air flow is a tricky thing; one has to test what is an obstacle in combination with everything else.

Generally section changes, area reductions, sharp edges surface friction all give rise to losses in steady state pipe flow. The flow loss reduction or lack there of, with respect to a de-snork comes down to the flow losses associated with the snork (area restriction; the cup is a sharp edge vs. the sharp edge you are left with upon its removal. I would guess that the huge intake area increase would just beat out the losses associated with the air box sharp edge....but one has to test.

I did this mod for sound; it is fanastic and I want more of it. If you are after a significant power go for an under drive pulley instead. I do get worse fuel economy because I am hard on the throttle enjoying the sound!

One day when I get around to it I will fabricate and post my solution to the de-snork sharp edge

[Boxtaboy]

That's exactly what I did. I didn't like the sharp edge left after pulling out the snork, so I took a dremel to the sharp edge, and ground it to a smooth curvature. I then vacuumed out all the stuff I ground down. Here's a blurry pic I took after it was done...

Originally Posted by jaykay

Lets leave out intake tract acoustics and ECU response to airflow changes which affect performance. Assuming that these that these factors are not affected by de-snorking, we now basically left with flow considerations. A normal Boxster engine has to draw air in like a pump. Flow losses upstream of the engine will reduce the flow rate at a given rpm. Fluid energy is lossed by having to make through obstacles. Air flow is a tricky thing; one has to test what is an obstacle in combination with everything else.

Generally section changes, area reductions, sharp edges surface friction all give rise to losses in steady state pipe flow. The flow loss reduction or lack there of, with respect to a de-snork comes down to the flow losses associated with the snork (area restriction; the cup is a sharp edge vs. the sharp edge you are left with upon its removal. I would guess that the huge intake area increase would just beat out the losses associated with the air box sharp edge....but one has to test.

I did this mod for sound; it is fanastic and I want more of it. If you are after a significant power go for an under drive pulley instead. I do get worse fuel economy because I am hard on the throttle enjoying the sound!

One day when I get around to it I will fabricate and post my solution to the de-snork sharp edge

[jaykay]

Nice work! I didn't there was enough material there to shape a lip; I have 2000. Plus my plastic panelling is much tighter around the opening than yours. Huge losses can occur on sharp intake edges. Did you get a different sound out of it?

I was thinking about something a little more sneaky......I am betting someone here has probably done something similar already. I will post it up when I get it done.

[Boxtaboy]

Thx. Your intake opening should look exactly like mine, because mine's a 2001, and they didn't change it again until 2003.

You can definitely dremel down the sharp edge until it gets smooth. The sound is great, but I don't think dremeling the edge changes it much, the desnork itself adds a nice sound alone.

What I think would be interesting to do is to cut off the snork tube near the end where it meets the hole at the airbox and then either attach a curved trumpet like opening or fabricate one that will fit right into the hole as the original snork did. Short snork with a wide opening if you will...