Re: thoughts on breathing - long

["Dave Ewing" <rabbit16v@prodigy.net>]

I was planning on setting this up before I posted anything to make sure it
would work but I have a better idea (I think).  If you look on the CIS
Volvos they have a piece that will bolt right to the metal part of the air
flow sensor plate/fuel distributor and has about a 3" inlet that (if mounted
in a Scirocco) would point toward the front of the car with a little bit of
an angle.  All you would have to do is set some type of bracket up to hold
it in place then run a flex pipe or even silicone elbow to a 3" tube with a
cone K&N on the end.  The difficult part is already made for you and would
cost next to nothing at a yard (since they won't know what it is) then all
you would be into it would be about $30 for the silicone/tube/air filter.  A
3" piece of PVC pipe works good in between the TB and intake boot and cost
about 75 cents at home depot or Lowe's or some hardware store (you can even
paint it the way you want it!). I believe you'll need a 12 inch piece of
this pipe.  The Volvo part is also some type of plastic or PVC or something
light.  BMW also makes this piece on their CIS cars but it is aluminum and
the inlet faces the other direction.  A lot of cars used CIS including
Mecedes/Porsche/etc so their are other parts out there that we can play with
until we find something we like!!  Lots of ideas out there just gotta be a
little creative, and your on the right track!!!

I didn't read your WHOLE message but this is just the beginning, you know.
Bigger TB, ported intake, P/P head, and exhaust will help a lot!  HTH!!

Dave

P.S.  You can route outside air into your air box but you really can't ram
anything since the sensor plate movement needs to correspond with the need
of air into the motor via the TB or the fuel system will be screwy which is
why turbos run between the box and the TB (at least looking at if from a
logical viewpoint).  I have a hose running into my box from the front of my
car but also have cut some holes in the box so the air coming in doesn't
force the sensor plate up and exits out the holes in the box if not needed.

> Hi,
>      I've been thinking about how to improve my 8v breathing and I figured
I'd
> better get opinions before I did something permanent and annoying.  There
are 2
> basic problems to breathing on my stock CIS system and they each attach
> directly to the air box/fuel distributor assembly.  The first is the teeny
> little pipe that lets air in.  I removed the nasty little valve that was
there
> and re-ran the hose directly from the box to the connection in the back of
the
> air dam (yes, it stretched that far without difficulty and stays put).
> I was thinking, though, that this needs to be improved upon.  My first
thought
> was to 'swiss cheese' the box, but then I had a better idea.  If I were to
get
> a 2 inch floor drain and cut an appropriate hole in the bottom of the box,
I
> could attach a second pipe and run it to the grill for a bit of a ram air
> effect.  Done correctly and carefully, it should look quite neat and tidy.
> I've also considered cutting off the hose connection originally there and
> replacing it with a 3 inch bit of pipe.  Again, it should be simple to
make
> this look quite appropriate.  Any thoughts or comments?
>      The second breathing problem I see needing addressed is the pipe that
> joins the air box to the throttle body.  If you look closely, you'll
notice
> it's somewhat skinnier in the middle than on the ends.  I've seen a couple
> advertised replacements for this and they all seem to be based on somewhat
> flattened 3 inch piping with a 48 degree bend on one side to make it fit.
They
> also seem to be based on copper pipe.  My thought was to use 3 inch abs
pipe.
> Does anybody know if this stuff can be bent?  I would guess liberal use of
a
> propane torch would be helpful here, but I'm open to suggestions.  I think
> staying with black abs would look most like the stock piece there now
which is
> important when you're building a sleeper ;)  Besides, I don't have a pipe
> bender that will take 3 inch copper and I don't like the idea of paying
lots of
> cash for something I should be able to build myself for under $10.
>      I see both those things as extremely simple and inexpensive things
that
> should improve the air flow into the system substantially.  My biggest
concern
> is that opening up things that much might be more than a basic CIS system
can
> stand.  I'd appreciate any comments on this.
>      The whole point of this exercise is to make sure I have decent
airflow for
> the bigger throttle body I'm going to try and get from the wrecker's this
> week-end.  Any thoughts on which TB's I should be looking for?  I'm also
going
> to try to get a spare intake manifold for my engine to do the carving on
to fit
> the new throttle body.  Worst case, I go get another and try again if I
screw
> it up.
>      I appreciate any thoughts or comments (except on spelling or
grammar...;)).
>
> Cheers,
> Colin
>
>
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