Andr�
I think I finally figured this out.
The sheet metal in the cowl area is high in the middle and slopes to the
sides of the car in order to shed water that would otherwise collect in the
cowl area. Modifying this would probably present problems for water leakage
and rust. As you suggested, the solution is to open up the firewall where
you can above the cowl sheet metal, and build a long box that covers the
hole (build a plenum). Then the Ramair box can plug into the plenum. This
would require little or no modification to the Ramair box and still provide
a relatively clean install.
Tom
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: "Chevelle-list" <[EMAIL PROTECTED]>
Sent: Thursday, April 08, 2004 8:54 AM
Subject: Re:[Chevelle-list] Re:Cold Air Induction on a 66
> Tom,
>
> now I understand better, it the duct was steel you could just modify it
but now you have to know something about corvettes or boats to do so, I'm
not good at it but I've heard that its not that difficult (as always its not
difficult to do things you know a lot about)
>
> I think it was Dale that had a picture or two with some nice ducts a while
ago.
>
> Anyway, I personally do like the Smokey Yunick style on the right side of
the cowl as well.
>
> Sorry but I cant tell you how to modify the cowl in the right way.
>
> Andr�
>
> > Hey Andr�
> >
> > Yes, I have thought of making a wider, narrower duct, but it would
have
> > to be pretty wide since the open area behind the center of the firewall
is
> > so limited. Also, I was trying to avoid having to fabricate a custom
duct by
> > using the Ramair duct, which is fiberglass. It looks like a nice unit. I
> > could be a little messy with moving the metal since it wouldn't be seen,
but
> > the duct will be very visible. I've also seen ducts that have two horns
that
> > go on either side of the firewall to avoid the problem. This may be
another
> > option.
> >
> > Thanks.
> >
> > Tom
> >
> > ----- Original Message -----
> > From: <[EMAIL PROTECTED]>
> > To: "Chevelle-list" <[EMAIL PROTECTED]>
> > Sent: Thursday, April 08, 2004 4:48 AM
> > Subject: Re:[Chevelle-list] Cold Air Induction on a 66
> >
> >
> > > Hey Tom.
> > >
> > > I like your idea of keping things clean.
> > > I dont know much about moving that firewall metal around, but you
could
> > just make the hole of another shape.
> > >
> > > If what you need to get enough air is 17x3" (51sq.in. of area) you
would
> > have the same amount of air using a hole which is eg 20,5x2,5" or
25,5x2"
> > > I would not go very narrow (like 0,5" or 1") because there is
something
> > about the airflow along the wall etc. I'm not an expert but its for sure
> > possible to read in a book somewhere.
> > >
> > > of course you would need to modify the duct as well, but that should
not
> > be a problem I think ??.
> > >
> > > I dont know if this is doable at all but you could always consider it.
> > >
> > > Ciao
> > > Andr�
> > >
> > >
> > > > I've got a 66 El Camino that I bought in pieces (rolling chassis +
> > parts) last year. I'm still planning out what I want to do with it, and
one
> > of the things I'm considering is cold air induction. I'd like to do
> > something like the Rudisill cowl plenum through the firewall so I don't
have
> > to get a new hood, but I don't like the looks of the duct hanging off
the
> > side.
> > > >
> > > > I'd rather go straight back from the air cleaner to the firewall
using
> > something like the Ramair box, which is an air cleaner with a 17" x 3"
duct
> > coming straight off the back. There doesn't appear to be much on the
> > firewall directly behind the air cleaner on a 66 except the distributor
and
> > a wiring duct. However, when I looked at the center of the firewall on
the
> > 66, I noticed that the cowl space on the dash side doesn't have enough
room
> > for a 17" x 3" hole without cutting into the driving compartment. I
> > certainly don't want my engine sucking air from there. When I look at
the
> > location of the sheet metal under the dash area that forms the bottom of
the
> > cowl area, it looks like it could be cut out and moved down to
accommodate
> > the 17" x 3" duct hole without interfering with the heating ducts or
other
> > under-dash items. But I can't be sure with the car torn apart.
> > Interestingly, the offending sheet metal moves down as you move away
from
> > the center of the firewall, making room for a cowl duct on the right
side of
> > the car (where the Rudisill duct goes).
> > > >
> > > > So I'm looking for some opinions from the list, especially those
that
> > have a 66 Elky or Chevelle.
> > > >
> > > > 1) Is there some reason why you couldn't move the sheet metal that
forms
> > the bottom of the cowl area down to make room for a 17" x 3" hole
through
> > the firewall? (a structural reason, or interference with things in the
dash
> > area)
> > > >
> > > > 2) Is this too much trouble to keep the engine compartment clean and
> > have cold air? The car is already torn apart, so now is the time to do
it.
> > > >
> > > > I apologize if the explanation of the problem is not clear.
> > > >
> > > > Tom Tomlinson
> > > > '71 Malibu
> > > > '66 El Camino
> > >
> > >
> > >
> >
> >
> >
>
>
>
