Injector mounting in manifold.

[Ben Swann]

Why not immediately after the throttle body?   It is directly in the airflow
just as if right before the TB.  Is the airflow that much different before
the TB than right after?  I had mounted an injector in the top of the IC
before the car was wrecked.  The intercooler was cracked and although I can
do this again on another IC, the fitment was really in the way of the hood
relaease.    It would be nice to mount the injector inboard a little, but
unless there is a special hose that replaces the Michelin Man, the only
alternative is where I am referring to.

What was/is the intended use of the mounting point on the manifold i'm
referring to?  It looks like it was meant to be a provision for mounting a
sensor or injector.

Ben
----- Original Message ----- 
From: "Jim Green" <jeg1976 at yahoo.com>
To: "Ben Swann" <benswann at comcast.net>
Cc: "Quattro list" <quattro at audifans.com>
Sent: Thursday, April 01, 2004 11:04 PM
Subject: Re: Injector mounting in manifold.


>
> --- Ben Swann <benswann at comcast.net> wrote:
> > On a '87 5000 turbo quattro which will get
> > supplementary fuel injector - I am considering
> > mounting an injector into the flat portion of the
> > intake manifold just post throttle.  A cold start
> > injector would go perfectly there, I think.
> >
> > Any BTDT on this, do's or don'ts? Will the CS
> > injector work fine as a pulsed supplementary
> > injector.  Are there other suitable fuel injectors
> > that have this type of flange on it?  Even if the CS
> > injector is not the correct one, I'd like to
> > provision the manifold to use the same fitment  that
> > the Cold Start injector has while I have access to
> > tap the holes for the injector and flange bolts.
>
>
> Ben, sorry, but that simply will not work.  You want
> the fuel to get into each cyl as evenly as possible.
> The only way to get it right is before the TB where
> the MM hose should be, or mount an injector in each
> runner.  Whatever you do, go in baby steps and check
> your plugs after tunning to make sure they're the same
> color and you're not running lean in any cylinders.
> Also, I think the CSV is designed more as a on/off
> valve than a high speed pulsed valve. You'll want to
> use a plain old fuel injector.
>
> HTH
>
> =====
> Jim Green
> '89 90tq
> '89 80q
> http://www.mswanson.com/~jgreen/car_home.html
>
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