peecher Posted February 18, 2011 Share Posted February 18, 2011 Dual carbs on a V12 are of course the classic way to add some pep and "sex' appeal. There are alternatives for added throttle response and improvements in "fume" control. Here are some pics of my latest 4 barrel carb set up utilizing an Austin manifold and some "modern" (60's) Ford components. The spacer plate under the Autolite 4100 carb is water heated via the tap on the left cylinder head. Heated water circulates thru it before entering the defroster. The PVC tap on the spacer place connects with a hose and PVC valve to a fitting on the front side of the manifold. The PVC valve is the same as that used on early 292 Fords. Reverse mounting the carburetor puts the throttle arm on the right side for easy hook up. The choke is another matter. Manual linkage improvization was necessary and being on the left side, I used the hand throttle control for choke operation. Still testing this set up on the modified V12 but so far it seems to like this. More this Spring when the weather gets better. Link to comment Share on other sites More sharing options...
b6vt Posted February 18, 2011 Share Posted February 18, 2011 Could you give a run down of the parts you used to build this. Do you have an air filter that completes the set up? Very interesting and clean looking set up. glenn lorei (b6vt) Link to comment Share on other sites More sharing options...
peecher Posted February 18, 2011 Author Share Posted February 18, 2011 Ken Austin ( austinrodshop) in Oregon supplied the manifold. Very reasonable at $600. This is the second manifold I got from him and he made some small changes including a tapered shim plate to level the carb ( $150). The Autolite 4100 carbs are easy to find but the smaller (1.08) venturi model is better I believe for the 12. The water heated spacer plate is also a common part used on 60's Ford/Merc V8's. I used 5/16" clear fuel hose as it is much easier to plumb due to some tight clearances. The right side spark plug conduit will need to be "knotched" in a couple places to clear the carburetor flange on the manifold. The regular fuel pump seems quite adequate. You will need an elbow fitting for the vacuum tap in the manifold in front of the carb for the vacuum brake in the distributor. I used a short piece of 1/8" hose to connect the metal line from the distributor to this fitting. The manifolds are not polished and do not have a heat riser section. I spent some time and elbow grease smoothing it up. Any aftermarket Air cleaner ( flat bottom) can be used. Here are a couple of picks with a Holley ( '57 Ford) installed, It too runs very nice. The Ford Racing air cleaner ( 1961) is pretty rare these days. Link to comment Share on other sites More sharing options...
Mssr. Bwatoe Posted February 18, 2011 Share Posted February 18, 2011 WOW ! That manifold is way cool. Do you really need to warm it up?? ..I mean the preheater with coolant flow...I bet it helps driveability a hell of a lot...How is fuel mpg?? Link to comment Share on other sites More sharing options...
peecher Posted February 19, 2011 Author Share Posted February 19, 2011 I have run this set up with and without the heated water thru the spacer with not much difference. I plumbed this option in just in case there were any tendencies for carburetor icing as we do experience many cool and humid days in the Northwest. As far as fuel economy goes I can't say with any certainty. I do feel the setup is running a tad leaner than the original carburetor set up tho. An exhaust analysis would confirm this. Frequent checks of the plugs indicate normal combustion. This is also true of the 1st set up on the un-modified, used ( little tired) V12 in my sedan which has no heated water flow thru it's spacer. Link to comment Share on other sites More sharing options...
motoringicons Posted February 19, 2011 Share Posted February 19, 2011 Great and innovative setup! Link to comment Share on other sites More sharing options...
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