Adapting a Weber 32/36 DGV 5A carburetor to the Scalded Dog Manifold, by Phred Hollister
I am running a "B" engine in my 1930 Fordor with a Lion Head III 7.0:1 head and a "B" carburetor, intake and distributor with
Pertronix II module installed. I was looking to improve the performance more with by changing the carburetor.
I preferred the progressive linkage of a Weber 32/36 over the synchronized operation of a Stromberg 97, and ordered a Weber kit
from Sam Guthrie at Arizona Model A (www.arizonamodela.com). The kit includes the 32/36 DGV 5A carb and an intake manifold
for the Model A/B block. Sam also has a nice choke cable kit that attaches to the stock choke rod holder under the gas tank and
an excellent bell crank throttle linkage for this manifold/carb combination.
As I live in the Chicagoland area and drive my car in the winter, I found that the intake manifold included with the kit did not allow
room for my manifold heater and did not get very much heat from the engine block for better atomization of the fuel. I purchased
a Scalded Dog manifold for its "hot" connection to the exhaust manifold.
I made an adapter block to mate the four bolt Weber to the three bolt manifold out of Â¾" aluminum plate using a drill press, die
grinder and a router, as my access to a real machine shop is limited.
After studying the relationship of the templates of the carb base with the intake base, it appeared that one of the two front holes
of the three hole intake base would need to be shared with one of the front holes of the carb base. I chose to make the inboard
front hole as the common hole and mounted a stud a 5/16-18 stud in the intake base. This configuration shifted the carburetor
outboard from the centerline of the intake and created room for my manifold heater. See figure 1.
Figure 2 shows the plate attached to the intake with 5/16-18 flat head cap screws and also how the larger throat of the Weber is
blended down to the smaller throat of the Scalded Dog.
Figure 3 shows the face towards the intake manifold with the proper holes countersunk for 5/16-18 flathead cap screws.
Figure 4 shows the face towards the Weber carb with its countersunk holes.
Figure 5 shows the completed installation with a fuel line removed to show how the bell crank linkage was relocated and rods
lengthened to work with the Scalded Dog manifold.
When complete, the hood on my 30 closed with just enough clearance. As the hoods are different on the 28-29 Fords, one might
only be able to install the Weber shifted inboard (closer to the engine block) than outboard as I have done. Please check this out
Gaskets were easily made by covering one face of the adapter with masking tape and rubbing my dirty finger over the tape to
make a "rubbing". Carefully peel off the masking tape in one piece, stick it on some bulk gasket material and use an
exacto knife to cut out the gasket using your rubbing marks as your template.
The carburetor is fed by a 12 volt low pressure electric fuel pump that does not require an external pressure regulator.
This combination of the Weber 32/36 and the Scalded Dog manifold has made a significant improvement in the performance in
my car and put a smile on my face.