Ram air on a diesel?

[VWCaddy]

Mr Brick Yard...
That looks pretty nice there...
I was wondering if you could describe
what is stock and what is not stock on
your cold air intake........
I do see the 3" abs 90's there..
The black piece that is going over the
valve cover and the air filter housing
is that stock?
Monst

Assuming you are referring to my post/picture.  The intake/air filter box is stock, the long tube over the valve cover is stock, then the rest is ABS plumbing fittings, as noted on the web page:
- http://www.4crawler.com/Diesel/CheapTricks/index.shtml#ColdAirIntake

I chose a size fitting to just fit over the end of the stock air tube (has a wrap or two of tape on it for a snug fit and a single sheet metal screw to hold it in place.

[bryanbryan89x]

Here is mine i did up on my caddy, Its constructed of 3 inch pvc at the air box, and at the grill I have a 8''-4'' Fernco, and a 4''-3'' Fernco to hook up to the 3 inch PVC.

[HarryMann]

Wow, that's we we call a soil pipe, night soil  :wink:

[Baxter]

This is what I have screwed to the back of my grille.

http://www.demon-tweeks.co.uk/products/ProductDetail.asp?cls=ROAD&pcode=GLOJC70

On a European Caddy/MKI Golf there is a handy cut out of the grille just to the left of the right hand headlamp, see the image below..



 I used one of those ducts, trimmed slightly and screwed into the grille between the lats.
You can't tell from looking unless you look real close then you can see the intake and the tube leading up into the airbox.
I had to trim the grill also and add some more slots below the factory ones but it all looks factory from the outside. I used some flexy tubing from the intake funnel to the airbox.
I would take a picture but the Caddy is scattered around the workshop in a million pieces as it's just in the precess of having a spot of welding/filling/painting![/img]

[monst]

Hi ,
 I got two quesetions...
One 4 Mr. Brickyard...
On the stock air box..
what would you say it the dimensions
of that hole.. for air inlet.....
 I am almost thinking of maybe
getting a Caddy air box....
   Mine is like byranbyran98x....
if the dimesion is sizable... I may go that route....
NEXT QUESTION:
   BryanBryan89x Could you explain you
air box mod.. in terms of the plastic
box itself..... It looks real clean and
you have a large inlet on it now....
what did you do to make the inlet bigger....

monst

[Baxter]

Ah, mine isn't like BrianBrians, er hang on..

mine is like this one..



but I cut the beak from the standard airbox almost completely off as it gets bigger bore the closer it gets to the airbox, they used flexy tubing to connect the beak to the funnel.

[RabbitJockey]

would anyone be interested in pictures of the factory cold air intake on my rabbit?  it's missing 2 pieces(the most vital) but otherwise is complete

[monst]

Yeah, that is cool Mr.Brick...
Where that piece kind of flattens..
over the valve cover...and then attaches
to the air box.... it is nolonger a circular tube
it is flattened some, when it attaches to the air box.
(it is oval).... what would you say the dimension
is of the oval opening on the air box.

[gldgti]

pvc is the go....

i cut my airbox and riveted/siliconed a piece of sheet into the box as an adaptor then made the pvc so its attached to the steel pipe into hte airbox - easy to remove..



click pic for larger view

[HarryMann]

No limit to the imagination here! I suppose a large rubber drain plug could be used as an anti-theft device on that one  

Wish I could rename this whole thread 'cold-air pickups' though  :wink:

[HarryMann]

http://www.eng-tips.com/viewthread.cfm?qid=156700&page=8

Worth a quick browse...

[bryanbryan89x]

Hi ,
 I got two quesetions...
One 4 Mr. Brickyard...
On the stock air box..
what would you say it the dimensions
of that hole.. for air inlet.....
 I am almost thinking of maybe
getting a Caddy air box....
   Mine is like byranbyran98x....
if the dimesion is sizable... I may go that route....
NEXT QUESTION:
   BryanBryan89x Could you explain you
air box mod.. in terms of the plastic
box itself..... It looks real clean and
you have a large inlet on it now....
what did you do to make the inlet bigger....

monst

Monst - To make the air box, I used a fiber reinforced polymer, And I took the old air box and made a few mods to it, then I used the old air box as a mold, and kept putting on layers of the polymer (Contact molding). Then I removed it from my mold (old air box) and i cured it in a oven.

I built that set up, because i wanted to see if the cold air intake really made a difference or not, in mpg and performance on the highway.  It proved to be a waste of my time, not much of a difference at all

[burn_your_money]

It proved to be a waste of my time, not much of a difference at all

You learnt something, you can hardly call that a waste

[monst]

Yeah, first, I like that "use a plug in it for the
purpose of a anti-theft device" that is a great one..
   Bryanbryan,
  You didn't see any gains at all that were
noticable? And this mold that you made
sounds interesting.....  this fiber reinforced
polymer that you mention...... where does
one purhase it.(brand).. Fabrication is always a good
skill... and figuring out that one has options
and can be resourceful......... is a good skill to
have also..... Wasting time.. I can relate........
time is a precious resource.......
How about some resources to "super charging"....
This is definetly in the back of my mind.

[burn_your_money]

Yeah, first, I like that "use a plug in it for the
purpose of a anti-theft device"

I'm not so sure that is a good idea. I think you could mess your engine up pretty good. A cheap anti-theft device is simply unhooking your stop solenoid's power source