By "Fenton Tube Treatment" I meant running tubing from the headers pipe
fittings to a plate bolted to the exhaust flange. Another message in this
thread also describes this. Clifford's catalog also shows a tubing
connection between their headers and an auxiliary plate below the carb. This
is described as an option for those in cold climates, it does not heat the
manifold but rather the carburetor. Maybe this would help reduce carb icing.
My understanding is that icing occurs due to the venturi effect of fuel
being accelerated through the carburetor ( I could be totally off base
here ) and this was a constant concern of carbureted aircraft, like WWII
fighter planes.
An exhaust flange plate can also be used to pipe heated water (from the
heater hose path) to the intake. This is better than nothing, but only
applies heat to that area, and only if the manifold has that exhaust flange.
Classic Trucks ran a series called "Project Six-pack" a couple of years ago
in which they said they would use a Holley injection system on a 292 Chevy
six. But in typical magazine fashion, the series stopped with no further
mention of induction. My guess is it didn't work out, and they didn't want
to offend one of their biggest advertisers.
I've seen a couple of blower-equipped Inline sixes, and once the physical
space problems from ungainly belt drives are sorted out, they work quite
well. A turbo really makes more sense, as everything is on the same side.
One of our Inliner gurus, Leo Santucci, is doing lots of research and
experimentation with turbo'ed inlines, and we expect a full report one of
these days.
Jack / Winter Park FL
----- Original Message -----
From: Hughes <avdoug@csn.org>
To: <SAFESIX@att.net>; <oletrucks@autox.team.net>
Sent: Wednesday, August 18, 1999 9:47 PM
Subject: Re: [oletrucks] heating a non-heated intake manifold?
>
> Tell me more about the 'Fenton tube treatment'. This sounds like
> you bolt a copper pipe to the bottom of the intake then run water
> to it. This is something I had considered but I have never seen it
> done and would like to have an idea of what someone else has
> done.
>
> Of course I've also considered fuel injection or a blower (just to be
> a little more over the edge) anybody running a daily driver with
> an extreme setup like this?
>
> thanks,
>
> Doug
>
> From: SAFESIX@att.net
> Date sent: Wed, 18 Aug 1999 23:05:12 +0000
> Subject: Re: [oletrucks] heating a non-heated intake manifold?
> To: "Doug Hughes" <avdoug@teal.csn.net>
> Copies to: "Doug Hughes" <avdoug@teal.csn.net>,
oletrucks@autox.team.net
>
> > Manifold heat has been the topic of several articles in
> > the Inliners newsletter. The consensus seems to be that
> > water heat is preferable to running tubes to the exhaust
> > flange (if present), as it presents a constant, gentle
> > source of heat to the entire intake. Most aftermarket
> > intakes being alloy, the heat won't transfer as well if
> > only present in the middle. Some members have reported
> > good results from the Fenton tube treatment, though.
> > Carb icing hasn't really been mentioned as the reason
> > for adding heat, However - it's keeping the mixture from
> > puddling, and uneven distribution that presents most of
> > the problems when running an unheated intake. When the
> > fuel mixture enters a cold intake manifold, it tends to
> > turn back into a liquid, which doesn't disburse to the
> > runners very well. This is a major source of stumbles,
> > flat spots, poor gas mileage and generally bad
> > driveability on a inlines with "performance" intake and
> > exhaust systems.
> >
> > Of the older intakes, I think only the Edmunds came as a
> > water-jacketed version. Some Offies, and other
> > aftermaket intakes were cast with the exhaust flange,
> > but with headers you lose even that source of heat.
> > Clifford now makes a water-heated intake (single 4
> > barrel only, I think) for Chevy and GMC inlines. I have
> > one on my GMC and it has made a major improvement in
> > driveability.
> >
> > A log manifold like a Howard or McGurk can usually be
> > water heated pretty easily by welding on a tube to the
> > back of the plenum, but the Offy-type intake lacks room
> > to do this. If the manifold you are looking at does not
> > have the exhaust flange, which would at least afford
> > central heat from the Fentons, I would pass on it, or
> > plan on some surgery to add heat.
> >
> > Jack / Winter Park FL (no carb icing problems here)
> >
> >
> > >
> > >I'm looking for a used dual carb intake that is
> > >water heated because I understand they work
> > >much better than the non-heated variaty. I have
> > >come across a non-heated offy that I might be
> > >able to get for a good price (includes carbs).
> > >Is there any way to get reasonable performance
> > >from this or should I buy it for the carbs and
> > >hold out for a water heated version?
> > >I'm not above attaching some heat mechanism to
> > >make it work better but I'm also not in a hurry
> > >so I can walk away with only minor regrets.
> > >btw. I plan to put fentons on as well so I won't
> > >be getting much direct heat from the exhaust.
> > >
> > >thanks to all,
> > >
> > >Doug
> > >
> > >oletrucks is devoted to Chevy and GM trucks built between 1941 and
> > 1959
> > >
> >
>
>
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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