Ram intake opening through foglight grill

[mattchat]

So, I've just had a thought after having my bumper off my 2013 S4 and with some of the talk around opening up the stock intake box to allow more airflow I realized two things. First, there is that round 2-2.5 inch diameter plastic mold a part of the bottom of the stock intake box that I believe some folks have cut open. Second, there is an option on our car to get the radar/speed sensing cruise control, which as a matter of fact is on the same side of the car. When I bought my black optics front fog grilles one option was to get the set that had the radar opening in it. Well, I don't have the radar but that opening is conveniently placed to run a pipe up to the stock airbox where one could cut open the round slot and hook up, kinda like another extension to the intake, and a bit of a RAM effect. I wonder if the SC whine would improve as well as the airflow.....hmmmmm. Now to try this out myself or wait and see who bites first. Here's a pic of what I mean:

http://members.shaw.ca/mattchatwin/images/Audi/radar.jpg

[Draxus]

You may get more whine. Just buy some brake ducting and end brackets and make it. Should be about $50 and pressurize the airbox more.

[Mr. Merk]

in for updates

[stumpjumper]

so you want to put your air intake at the perfect height to ingest water?

[Canvasoso]

so you want to put your air intake at the perfect height to ingest water?

This!

[mattchat]

yeah was thinking of that too, but there are bleeder valves you can install too.

[jrt03]

yeah was thinking of that too, but there are bleeder valves you can install too.

Bleeder valves for what? Water in you air intake box isn't the big issue, it is where the water goes from there. Into your engine!

[John@Roc-Euro]

If you're getting enough water UP that height and through a filter... your worries are no longer about ingestion, they're about unbuckling/exiting the car as it sinks into the lake your drove into.

[mattchat]

Sorry meant breather valve not bleeder. AEM and others use them as a break in the direct line in case water does get in the airflow follows the path of least resistance so will go through the valve higher up. That being said the port on the air box comes in at the side so there could be some draining holes at the bottom as well. Oh and I would never take my car through water like that anyway.

[Ynnekdude]

so you want to put your air intake at the perfect height to ingest water?

What, like this?

http://img.photobucket.com/albums/v171/Ynnekdude/SubSpeed_2_zps74e6792e.jpg

http://img.photobucket.com/albums/v171/Ynnekdude/SubSpeed_1_zpsed02dc67.jpg

[BirdmanQ5]

If you're getting enough water UP that height and through a filter... your worries are no longer about ingestion, they're about unbuckling/exiting the car as it sinks into the lake your drove into.

LOL.

So what you're saying is this is safe to do, takes a lot to get water up there?

[Mrads]

If you're getting enough water UP that height and through a filter... your worries are no longer about ingestion, they're about unbuckling/exiting the car as it sinks into the lake your drove into.

ROFL


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[cspcrx]

I think hes talking about putting a duct down there and running a hose up to the filter to get more air to it.

I did this on my CRX. Used a brake duct that is mounted down in a similar area and then ran a 3in duct hose up to the filter. Works really well. I have it right up against the filter and after a few events the filter has a perfect 3 in black circle on it from all of the junk that is also making it to the filter with the air.

[jrt03]

Sorry meant breather valve not bleeder. AEM and others use them as a break in the direct line in case water does get in the airflow follows the path of least resistance so will go through the valve higher up. That being said the port on the air box comes in at the side so there could be some draining holes at the bottom as well. Oh and I would never take my car through water like that anyway.

This info is incorrect, Electricity takes the path of least resistance water will take all paths. I would forget about this idea (it is a cool concept thou) and just go with a Roc- Euro intake.

[AKPS4]

What, like this?

http://img.photobucket.com/albums/v171/Ynnekdude/SubSpeed_2_zps74e6792e.jpg

http://img.photobucket.com/albums/v171/Ynnekdude/SubSpeed_1_zpsed02dc67.jpg

Seems like its already been done. Any further information on performance?

I probably wouldnt do it because i dont see there being any huge benefit, maybe some cooler intake temps but prob not significant enough to make a different vs. the risk of water soaking the filter. You dont need to drive into a lake for large amounts of water to soak up the front of your car during heavy rains, particularly when other cars are in front or opposing traffic splashes water onto your front end.

Also, what about collapsing the intake tube from being that long? Im sure you can use something strong enough, but would brake duct tubing be strong enough?

Good luck.

[Ynnekdude]

Seems like its already been done. Any further information on performance?

I probably wouldnt do it because i dont see there being any huge benefit, maybe some cooler intake temps but prob not significant enough to make a different vs. the risk of water soaking the filter. You dont need to drive into a lake for large amounts of water to soak up the front of your car during heavy rains, particularly when other cars are in front or opposing traffic splashes water onto your front end.

Also, what about collapsing the intake tube from being that long? Im sure you can use something strong enough, but would brake duct tubing be strong enough?

Good luck.

I have an A6 but I believe our setups are essentially the same. Another A6 guy, "The_Transporter" had it done originally and raved about it so I pulled the trigger.

The pipe is made of aluminum; it will not collapse. It was powdercoated black but I still put a header wrap on it to keep things cool. In order for it to fit down there, the secondary air pump was relocated from the fog area. The black plastic "deflector" was also removed so now outside air flows directly onto the filter. I can pop the "deflector" back on when there is crappy weather so that my filter isn't exposed directly to it. So far, even without the deflector in place, I have driven through heavy downpours with no issues.

Prior to this setup, I had an open air setup similar to the Roc-Euro but custom as the A6 doesn't have any off-the-shelf intakes available. With that intake, I ran a 12.9 1/4. With the new intake, I ran a 12.6. However, several variables changed between runs, including: mounted my heavier summer tires; used 93 octane instead of 100 octane; had 1/4 tank of gas instead of 1/2; experience level; and, as mentioned above, the new intake. I figure the new intake picked me up at least .1 in the 1/4.

With the old "Roc Euro Style" setup, whine was quite noticeable in the car. Now, it's not as pronounced inside the car but it's crazy loud at WOT on the outside.

[ehaze]

http://assets.bankspower.com/prod_inline_images/453/ram-Air-sScoop.jpg

http://www.bankspower.com/dieselairintake/dodge59l

Clearly not designed for our cars, but you get the idea.

[gendry]

This is also incorrect. Water will take path of least back pressure and will only take multiple paths to the extent pressure between the paths equalizes. If the breather valve can bleed water with less pressure than it would take the water to rise up and into filter it will work just fine.

Note I am not saying "this will work just fine"... but its possible...


This info is incorrect, Electricity takes the path of least resistance water will take all paths. I would forget about this idea (it is a cool concept thou) and just go with a Roc- Euro intake.

[Draxus]

I was talking about something else.

Leave the stock airbox, but seal a secondary hose to it and run that hose down the opening with a cone to the bumper opening.

You will then pressurize the airbox when you are moving. Think of it as a second airbox intake...

[mattchat]

Some interesting ideas and comments folks. I think if anything the idea is cool as it would look pretty good using the radar grill. There are a lot of race cars that have a setup like this, granted they aren't driving through puddles but I do have a little experience with this and the gains would be minimal. In my Honda days I've seen s2000's kitted with a ram scoop in the front bumper, and it was quite low but there were water escapes as well at the back of the inlet RAM, and filter was up high in the box like the banks pic ehaze posted above. Thats the idea I think I'm after. I had an AEM on my Accord Coupe that I quickly got rid of for a short ram because it was low in the front grill and would pick up water just from a car wash and get bogged down. That's why I would keep the filter up high in the intended box. I've used pre-filters too and they work quite well but do cut the flow down a smidge. At the end of the day, the increased whine is good, but not too loud. The Roc is not my cup of tea, but I also haven't heard it in person (youtube vids I'm sure make it seem louder than it is), but I do like the idea of the pressurized cooler air getting in the most. I like the open discussion, I might try it some day but for now I'm happy with where things are....you know how it goes though, you get board and have the itch to do something....heck I'm already looking at upgrading our Odyssey to the new model and it's only 2 years old and I already bought parts to swap out the headlights HIDs for s2000 lenses, and some other stuff....I'm sure I'll come back to the S4 soon enough.

[Mops@Nemesis]

If you're getting enough water UP that height and through a filter... your worries are no longer about ingestion, they're about unbuckling/exiting the car as it sinks into the lake your drove into.

No shit. I saw this early today but was not about to argue with these guys.

[AKPS4]

that BANKS setup looks pretty sweet. Now you got me wanting to start a project and create something...

[S-Fore]

Google airplane parts. I can't recall the website, but small aircrafts use high quality ducting for various things and is inexpensive (like $6/ft)

[toerag]

they make these for TT's

&

http://www.pipercross.net/fast_road/index.asp

[ehaze]

that BANKS setup looks pretty sweet. Now you got me wanting to start a project and create something...

Some of the systems have holes on the back side of the scoop. This allows for water n' stuff to pass through.

Example can be seen in this post:
http://www.duramaxdiesels.com/forum/showthread.php?t=3465

[OmahaB8]

http://www.duramaxdiesels.com/forum/showthread.php?t=3465

The sponge gasket being used is hilarious [facepalm]