Ed,
I ran the stock Amphicar carb and engine setup for two years out here
in California and never experienced any problem with the vapor lock on
the 1147 engine, so perhaps you are worrying about a problem that you
will never have. The only thing I found that was odd about the Solex
on my car was it was easy to flood the engine when cold and starting
it took a little practice to get right. The Weber carbs aren't at all
touchy to use.
Someone posted a note about switching the head on an 1147 to an 8 port
version. I wasn't interested in doing that however and didn't pay
much attention to it but evidently at some time Triumph made such a
head. Since you are more interested in "stock" condition than I am, I
would simply build your car up with the normal parts and try it. It's
going to be a lot cheaper than dealing with the issues you'll come up
with once you switch something. I would only switch something on the
engine if you wanted some form of improved performance.
John Friese
67 White
67 Red
--- In amphicar-lovers@yahoogroups.com, "WB6WSN" <wb6wsn@c...> wrote:
>
> ----- Original Message -----
> From: John Friese
> To: amphicar-lovers@yahoogroups.com
> Sent: Saturday, October 16, 2004 9:37 PM
> Subject: [amphicar-lovers] Re: Intake Manifold Question
>
>
>
> Hi Ed,
>
> As you know, I have put larger engines in both my Amphicars and use
> the Pierce manifold with a Weber DGV two barrel, downdraft carb.
> setup. The manifolds have that pipe running under them but since I'm
> in the moderate weather of California, I didn't bother to connect the
> heater line through that piece of pipe and don't have any trouble at
> all. I'ts quite possible that having cooling water running under the
> manifold would serve both those purposes when operating in extreme
> weather conditions. I've never had any vapor lock problems when
> running hard at 106 degree temperatures though.
>
> I avoid those side draft setups though since there's no way to pull
> cool air into the carbs and since the intakes are right next to the
> muffler in an Amphicar, the problem would be at it's worst in this
> application. The dual carb setup is also expensive and requires
> balancing the carbs. The two barrel DGV carb is reliable, can be
> made to work with the Amphicar air cleaner and looks like a stock
> installation, only better.
>
> John Friese
> 67 White
> 67 Red
>
>
>
> I have been giving some thought to possibilites of isolating the
carburetor from the heat of the exhaust manifold, and there seems to
be a few choices for alternate manifolds. The Pierce manifold that you
used (this one?)
>
>
http://www.piercemanifolds.com/Images/Catalog/99003.807PM.htm
>
> seems to be only for the larger Triumph (8-port heads), and allows
for a downdraft Weber DGV carburetor. Maybe you used the whole kit:
>
>
http://www.piercemanifolds.com/Images/Catalog/P17-010.htm
>
> But I'm not intending to change my engine, so I'm looking for
solutions for the 1147cc, 6-port head, GA or GB engine. I'm not very
close to doing this work, but a little exploring never hurts, and you
can watch eBay for bargains with no compulsion to buy <g>. I already
bought a used exhaust-only manifold, and I was looking at the intake
manifold choices. Maybe Pierce has a manifold for the 6-port head
engines. I kinda like the single-carb idea, as it keeps the engine
more original, but there also seems to be a lot of 1.25" dual
side-flow intake manifolds available, so that steers me toward a
sideflow, dual-carb setup.
>
> From what I've read, few have any good words about any kind of Solex
carbs, so I'm not too averse to using a different carb from the Solex
30PSEI that I have (it'll need a complete rebuild anyway). Beyond
that, is the Weber DGV "too much" for the 1147cc engine? Any speculation?
>
> Ed
> El Cajon, CA USA
> 67 Rust Guppy
>
>
> [Non-text portions of this message have been removed]
