Re: [FWDLK] exhaust manifold back thru the intake manifold and over to the other exhaust

[Roger Howard <rhoward@xxxxxxxxxxxx>]

Richard's reply makes sense. I have heard of the term "crossover", but I
have never taken the time to  figure out how exhaust gas could travel thru
the INTAKE manifold... there must be separate, distinct passages in the
intake manifold? Do 318's, 361's and 383's all function the same way (that
is- have distinct passages).
Come to think of it, the intake manifold on my 361 has a sheetmetal pan on
its underside, and under that pan is a BUNCH of oily, sooty crud....
Guess I need to go to engine school...
RogerH
----- Original Message -----
From: "Richard" <56fury@xxxxxxxxxxxx>
To: "Roger Howard" <rhoward@xxxxxxxxxxxx>
Sent: Monday, April 09, 2001 8:50 PM
Subject: exhaust manifold back thru the intake manifold and over to the
other exhaust


> When the heat riser valve is closed that side's exhaust crosses in the
> intake manifold to the opposite exhaust.  The point is to heat up the
> carburetor and air/fuel mixture fast and get the gasoline vaporizing
better.
>
> Richard
>
>
> ----- Original Message -----
> From: "Roger Howard" <rhoward@xxxxxxxxxxxx>
> To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
> Sent: Monday, April 09, 2001 8:31 PM
> Subject: Re: [FWDLK] exhaust manifold butterfly
>
>
> > List,
> > In an effort to reply to Larry's question, I went out to the garage and
> > checked out an exhaust manifold from a 318. The butterfly valve inside
> will
> > "open" the passage about 1/3 if you turn the shaft counterclockwise, but
> the
> > counterweight and spring are set up so that the valve is completely open
> > when the shaft turns fully clockwise and a tang on the  counterweight
> > contacts a 'stop'.
> > Larry says he lives in a warm climate and doesnt need this warmup
feature.
> > Larry seemed to think that this butterfly diverted hot exhaust from the
> one
> > exhaust manifold back thru the intake manifold and over to the other
> exhaust
> > manifold. Is this correct? I thought the valve just basically restricted
> the
> > speedy exit of the hot exhaust, thereby spreading heat thruout the
engine
> > block. Eventually, the heat warmed  the thermostatic spring, which
rotates
> > the valve open. At the same time, the spring-controlled carb choke had
> > warmed and opened,  and now your engine was all warmed up and running
> smooth
> > as silk..
> > RogerH
> > ----- Original Message -----
> > From: "larry gardinier" <gardinier@xxxxxxxxxxxxxx>
> > To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
> > Sent: Sunday, April 08, 2001 10:41 AM
> > Subject: [FWDLK] exhaust manifold butterfly
> >
> >
> > > I took my 58 Savoy out for it's maiden voyage the other day. It drove
> > > nice but after a couple miles it overheated. The hoses look new, the
> > > waterpump is new and the belt is fine.  After the car cooled down
> > > overnight I started it up and felt the intake manifold, it was hot
> > > around the choke and cool around the intake ports. The butterfly was
> > > definitly frozen, I've since loosened it up with some penetrating oil
> > > and I want it to stay open. Question is, What's open? All the way
> > > clockwise? or all the way counter-clockwise?
> > >  Thanks to all,
> > >  Larry Gardinier
> > >
>