As part of the installation of the Scalded Dog manifold and Stromberg 97 Carb my friend Austen at Ozcraft made the throttle link you can see in the pictures above from Charlie Yapp’s plan. The link bolts to the manifold, but had a habit of coming loose and if tightened too much the throttle action would be very stiff. So, the link was drilled out a bush added along with a locknut behind the link. This allows the link to turn freely meaning the action was far more acceptable.
Tag: Scalded Dog
Making an Adjustable Throttle Return Spring for the 1929 Model A Ford Sport Coupe
After the conversion to the Scalded Dog inlet manifold and Stromberg 97 carb there has been some slight throttle sticking issues. The majority of the issue had been cured by the snap shut device provided by Stromberg
Despite this the throttle still occasionally sticks a little due to the nature of the linkage.
A spring was needed and not one that was too heavy which would add to an already fairly stiff throttle action.
I couldn’t really find what I wanted so I decided to create something out of some small springs that I already had, plus an electrical connector to allow for some adjustment once fitted.
This worked out well and I was able to adjust the tension after fitting. You’ll notice the use of some heat shrink tube to make things look tidy.
So far so good!
Stromberg 97 and Secrets of Speed Scalded Dog Manifold Upgrade for the 1929 Model A Ford Sport Coupe
Some time ago before my Dad passed away we had chatted about what upgrades might have been done to the coupe back in his days. He was born in 1936. Before I managed to get the parts my Dad sadly passed away.
So as a bit of a tribute I bought the following parts
Stromberg 97 Carb – from Dave O’Neil (O’Neill Vintage Ford)
Scalded Dog Manifold – from Charlie Yapp (Secrets of Speed)
Chrome Air Scoop – from Dave O’Neil (O’Neill Vintage Ford)
Facet Electric Fuel Pump – Carbuilder.com
Petrol King Fuel Pressure Regulator – Carbuilder.com
Fuel Pressure Gauge – Carbuilder.com
Braided Fuel Line – Carbuilder.com
Copper Fuel Line – Amazon
Rubber Fuel Pipe – Carbuilder.com
Various Connections and Unions
Jubilee Clips -Screwfix
Fuel Pump Relay – eBay
Rocker Switch – eBay
Parts I already had
MSD plug lead set and tool
Modern distributor cap
Wire and connectors
My friend Austen fabricated the required new throttle link rod from the dimensions provided by Charlie
First job is to remove the existing manifold and carburetor
This is a Model B carburetor fitted by a previous owner, this carb has had a brazed repair in the body which whilst a bit rough and ready worked fine.
These inlet manifold fixing bolt holes where not used with the original manifold, but are needed for the new one. These were cleaned out with a tap.
The carburetor and manifold were assembled and bolted into place
First attempt at wiring the fuel pump and the use of braided fuel line. This looked quite bad as the wiring was temporary to get home from my friends workshop. I didn’t like the look of the braided line.
Decided to go with copper fuel line with rubber termination to solve any issues with engine movement that may cause leaks.
The fuel pump and regulator fit nicely in the chassis rail, these were removed to change 90 degree elbows for a better pipe run
First attempt with copper/rubber fuel pipe as you can see the wiring is a lot tidier, you can also see the pipe run between the pump and the regulator. The wiring will be tidied and weatherproofed further. Use of the screwed connector has been chosen to make a pump change on the road easier.
This is a view from above, quite tidy but still not happy! Too much pipe run above the exhaust manifold and the carb feed pipe is not secured enough for my liking.
At this point a leak from the sediment trap was noticed, caused by the failure of the gasket
The reproduction item is made of neoprene but a horrible fit and had to be cut to fit. Bowl and trap were cleaned and then reassembled
Wasn’t happy with the throttle feel so spaced with some fibre washers, a lot better now. The throttle also stuck a little, so the joints on the rods were lubricated and Clive at Stromberg provided a nifty little solution to snap the throttle shut. This also doubled as a safety measure as per Charlie’s advice in case of linkage failure.
As you can see runs very well, starts better, warms up quicker, very happy.
More once I get a few trips under my belt with the new set up.
Piranio’s Antique Automotives Model A Ford engine Dyno
Some really interesting Dyno results for various tuning tweaks and combinations of Model A Ford Flathead Four Bangers on this excellent site.
STOCK MODEL A FORD ENGINE, “A” CARBURETOR ON BORED OUT “A” MANIFOLD
STOCK MODEL A FORD ENGINE, “B” CARBURETOR ON “A” MANIFOLD
STOCK MODEL A FORD ENGINE, “B” CARBURETOR ON BORED OUT “A” MANIFOLD
STOCK MODEL A FORD ENGINE, WEBER 32/36 CARBURETOR & INTAKE MANIFOLD # A-9510-W
STOCK MODEL A FORD ENGINE, WEBER 32/36 CARBURETOR #A-9510-W & INTAKE MANIFOLD, CAST IRON HEADER # A-9430-H & SMITHYS MUFFLER
STOCK MODEL A FORD ENGINE w “C” HEAD
“C” HEAD, “B” CARBURETOR & A MANIFOLD BORED OUT TO B SIZES
“B” HEAD, B CARBURETOR, A MANIFOLD BORED OUT TO B SIZES
SNYDER HEAD, STOCK ENGINE, A CARB & MANIFOLD
SNYDER HEAD, B CARBURETOR, A MANIFOLD BORED OUT TO B SIZES
SNYDER HEAD, B CARBURETOR, A MANIFOLD BORED OUT TO B SIZES , ARIES MUFFLER
BRUMFIELD HEAD, STOCK ENGINE, A CARB & MANIFOLD
BRUMFIELD HEAD, B CARBURETOR, A MANIFOLD BORED OUT TO B SIZES , ARIES MUFFLER
BRUMFIELD HEAD, DUAL STROMBERG 82 CARBURETORS, BURNS MANIFOLD, ARIES MUFFLER
SCALDED DOG, CHARLIE YAPP’S VORTEX DUAL ZENITH INTAKE MANIFOLD
See the rest and much more here
Secrets of Speed Society
Secrets of Speed
One of the magazines I subscribe to is Charlie Yapp’s Secrets of Speed. More than a magazine the Secrets of Speed Society is a community dedicated to high performance four bangers. Charlie has an excellent range of speed parts under the “Scalded Dog” brand name. The magazine content is excellent with very high quality technical information and tips.
Take a look and join the Society!