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11-13-2011, 01:24 PM | #1 |
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Mr. TT'ed my AFE Stage 2 Intake-Cowl induction!
hey guys this is the last mod to my car in preperation for BIGGER turbos. The base AFE stage 2 is a great true cold air intake, however in base form it has the same area of fresh air draw as the factory intake, so I wanted to use the auxilliary port on the AFE which increases the inlet area by 4.5 sq/in. A friend and I hand made this duct to fit in the passenger side cowl area so i could pull from ambient pressurized air at speed, the duct is made from 2.5" hand hammered stainless tube and is riveted to the plastic cowl:
here is the finished system with the duct riveted to the cowl: another angle where you can see the cold air path to the duct: This mod in addition to my Macht Schnell scoops in the front should insure an ample supply of cold air to the BIGGER snails! |
11-13-2011, 04:21 PM | #3 |
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The base of the windshield is usually a source of high pressure much like the front of the car! This is why your fresh air pickup for your ventilation system is located there, if there was a vacuum your ventilation system would degrade as vehicle speed increased. However this phenomenon doesn't really kick in until 90 + mph where you can actually start to see positive pressure! Take a look at this pic of of a similarly shaped Volvo s80:
My main goal with this is to provide the turbos with as much unrestricted ambient airflow as possible Last edited by TurboBullett@Ambient Thermal Management; 11-13-2011 at 04:27 PM.. |
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11-13-2011, 05:39 PM | #5 |
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Awesome...I'm sure you already upgraded your FMIC and diverted valves so let us know when the bigger turbos are installed. I'm interested in the doing the same in the future
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11-15-2011, 01:55 AM | #6 |
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I fitted an additional air feed to my AFE stage 2 as well, but i took mine from next to the FMIC. pics on here if you do a search on my posts
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11-15-2011, 07:33 AM | #8 |
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brillant!
but I assume that you gotta find a way to prevent water getting inside, while raining. BTW i was thinking to get previous ver. of afe CAI ( the one with dual filter). and guess I gotta get that boxed one too. looks nice and reasonable. |
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11-15-2011, 10:01 AM | #9 |
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The box has always stayed cold prior to this. The main reason was to provide as little restriction as possible in the intake tract as well as have the air flow on both ends of the filter!
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11-15-2011, 10:03 AM | #10 |
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The cowl duct is well under the hood, and the water off the windshield is diverted to the sides if the cowl. I'd go for this intake it's a better version of the already good factory box!
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11-17-2011, 07:01 PM | #11 |
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Update, it rained very hard here yesterday and the area where the duct is placed stayed bone dry,
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12-14-2011, 09:57 AM | #13 |
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Looks great, very tempting.
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12-14-2011, 12:39 PM | #15 |
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I don't think it works, either the air will come in from one end and go out on the other end or both air enter and will create turbulance inside the air box.
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12-14-2011, 10:40 PM | #16 | |
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but, I think this mod was not only to ram the air inside, but also to make the closed sys. closer to opened sys, without heatsoak. |
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12-15-2011, 04:37 AM | #17 |
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The goal here was to provide a cold air source that provides "ample" cold air! My main concern is not bottle necking my system once I go big turbo!(its been proven the restriction of the stock box is the inlets from the front of the car as they enter the box) Once I hit that theoretical choke point on the stock inlet the suction(pressure differential) will bring the auxiliary port into play. if the airflow coming into the box is more than is needed I am ok with it going back out the back in my experience designing intake systems this should work very well as both inlets are located in high pressure areas sealed off from the heat. and give the cone filter located in the box a fresh air source at the front and back of the filter!
heres a pic of an intake i worked on with a friend on his S4, it featured a lower velocity stack inlet and a track only headlight ram air system! Last edited by TurboBullett@Ambient Thermal Management; 12-15-2011 at 06:28 AM.. |
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