Luxus Panzer

please post your ram air setup pics!!

losnova

I'm not sure which ram set up you mean but the majority of the "true ram air set-ups" I have read about seem to be the stock airbox with a free flowing filter element and a velocity stack. The air boxes on our 12Vs come with a ram set up already. however, there was a heated discussion over what an "S3 VS" really is. It seems the original (and rightfully, only)S3 VS was Mance's creation for the B series chasis, specifially designed for those air boxes. STFA and see what I mean.

VAP

is "forced via velocity" into the intake tract, forcing pressurized air through the throttle body. S3 velocity stack has about as much to do with ram air as fish have to do with bicycles, ie; nothing whatsoever!

The stock 12V airboxes are not even close to "ram air" boxes as they build exactly "0" positive pressure at any speed or RPM. In fact, just the opposite, they build "vacuum" which is as far away from positive pressure (ram air) as you can get.

It is possible to develop well over 1/3 Bar positive pressure (boost) on these cars with the appropriate setup and at speeds over 70MPH. Stock airbox runs about -.7 inHg vacuum at 130MPH. And approx 3 times that much vacuum at 70MPH.

There were several such systems built here that did exactly that to a greater/lesser degree.

Luxus Panzer

air box needs to be cut/moded?

losnova

I obviously based my guess on the fact that I saw the components for the set up are on my 100CSq. My bad. I see a flared horn-type of an opening on the begining of the intake above the radiator which connects (seemingly crappily) to the air box. I would have never guessed it would create vacuum though.

I would consider that your VS would be an intergal part of any good ram set up, however. Why build pressure if it cannot transition smoothly from one opening to another? My analogy would be, more correctly from my perspective, that a fishing rod has nothing to do with the act of fishing as it is an act involving only a fish and a hook and line. However why fish without a rod? The ram effect, only, is directly proportional to air velocity. A set-up IMO would need a good re-entrant intake transition.

What's with all the quotation marks anyway? Is it because here is no way to inroduce italics to give emphasis to words?

EDIGREG

I also had trouble finding any pictures when I was installing this, but I was able to gather enough information from descriptive posts to put this together. You can see the brake duct in the first picture. With some cutting, it fits perfectly into the foglight position. I used my old MAF adapter for connecting the duct to the airbox, and removed as much obstructive plastic inside the airbox as I could while keeping it sealed. I would appreciate any tips from Mance or anyone else with experience.
<img src="http://pictureposter.audiworld.com/98377/left_front.jpg">
<img src="http://pictureposter.audiworld.com/98377/pict0321.jpg">
<img src="http://pictureposter.audiworld.com/98377/pict0323.jpg">

Luxus Panzer

3 inch pipe?
did you leave the origonal opening on the air box as is or blocked it off?

Anyone got more info on the removal of the obstructive plastic inside the airbox??

islingtonaudi

An interesting set-up. The wheels look great by the way!

EDIGREG

I got the brake duct and the hose from ButlerBuilt...The brake duct outlet is 2.75" and the hose is 3". The airbox inlet is 3".

I sealed up the bottom half of the original oval shaped inlet, that the MAF adapter did not cover. I will snap a few more pics. There are a few threads regarding leaving it open, but I wanted to seal the system in an attempt to gain pressure/eliminate vacuum at higher speed.

As far as I understand, leaving it open will help the engine breath better at low rpms, but will not have the same "ram air" effect at higher speeds. Nevertheless, this setup breathes much better than my last setup(cone). The obvious difference for me was at high speed, but I also noticed a difference during low speed driving and take-off.

EDIGREG

thanks!