Carb  Jet sizes       In the Kit          Carb 1 Orig.       Carb 1 Now              Carb  2             Carb 3            Carb 4
                                                                                NX770CG               (green)            (Gary's)          (Doug's)
Main  Jet                .025 - .027           .039 - .043      .025 - .027                   -                      .032

Power  Jet              .018 - .019          .031 - .034        .018 - .019           .032 - .033        .025 - .027

Cap  Jet                 .036 - .040           .032 - .035        .036 - .040          .032 - .033          .032 - .034

Compensator Tube  .062 - .067         .062 - .067        .062 - .067           .062 - .067         .062 - .067
 "     side holes      .017 - .021          .022 - .024        .017 - .021           .022 - .024         .018 - 022

Idle  Jet                  .022 - .024          .022 - .024         .022 - .024          .022 - .024          .022 - .024 (#12)
"    side holes            .032                    .062                  .032                       .062                   .062

Venturi  (.866 or .788)-                          .866                  .866                     .866                 .866 (re-worked)

Float                          -                          Rectangle         Rectangle                     -                   Round
Inlet  Size (I.D.)- 1.82"
Outlet  Size (I.D.) - 1.29"
After new babbit was poured, the
rods and mains are carefully pre-fit.
Left Side View


I braized a small washer
next to the drain plug, for
safety wire.
Pilot's Eye View.  
Note the Radiator Position.
Plans built Prop Hub, with Model T
transmission shaft.
Model  A  Engine
Doug Bryant built this water
pump - the only part that is
original, is the impeller.
Oil Pan with Sub Pan installed
Model A   Engine Mount  -  Complete
Sub Pan with Oil Dams braized in place.
This is the second time I
had the engine apart.
Magneto Mount welded
in place on the Oil Pan.
Kitchens are good for things other than Cooking !!
Brass Oil Lines in place.
Bottom end all assembled.
After the engine was assembled,
and ran a couple of times, I used
Ping Pong balls to plug the
exhaust stacks, just after engine
shut down, to prevent Valve
Warpage.
With the engine in place, it's time
to start working on the cowling.
Exterior Oil Lines in place - per plans
Right Side of Engine, shows where holes are drilled through the block, with bolts and springs - per  plans.
14 lb.  Lead Balast, that I poured into a custom mould, and mounted with the Bell Housing Bolt Pattern.
Two access panels are for Oil
Drain, and Fuel Sump.
Front  View
Right Side Cowling Complete
I built a 76 X 48  Prop, which
turned out to be too much
Pitch.
The Prop I built really looked
great, but should have been a 42
or 44 Pitch.
Wico Magneto mounted
On January 6, '01 was the first time that engine has ran in over 30 years !!!
                 '31 Model A  Engine Specifications    
                             (from a Motor Manual at the swap meet)

Bore Dimensions:   3 7/8 bore X 4 ¼ stroke    200.5 C.I.        4.22 to 1 Compression
Ratio
Valve Lash:   Intake - .013          Exhaust - .016
Valve Stem Clearance:   .015
Valve Spring (Valve Closed):   36 lbs.
Spark Plug Gap:   .018 - .022
Timing:   14º BTDC

                    Clearances
Piston:   .015 Top        .002 Bottom
Ring Gap:   Oil Ring - .013          Compression Ring - .013
Crankshaft End Play:   .004          Main Bearing Clearance - .002


       From Zanes Antique Cars & Parts Catalog  (Model  A  1929 - 1931)
Point Gap:    .018 - .022
Plug Gap:   .035
Tire Pressure:   35 lbs.
Oil Capacity:   5 qts.
Valve Clearance:   .016
Rod Journal:   1.50
Main Bearings:   1.625
Bore:   3 7/8"
Battery:   6V, Group 1
Battery Ground:   (+)
Cyl. Head Torque (ft. lbs.):   50
Main Brg. Torque (ft. lbs.):   80 - 100
Conn. Rod Torque (ft. lbs.):   40 - 50
Clearance Limits for assembly of "A" Engines.
(Ford service bulletin, June 1931) All dimensions in inches.
Piston in cylinders-- .002 maximum
Piston ring gap, lower ring-- .008 to .010
Piston ring gap, centerring-- .010 to .012
Piston ring gap, upper ring-- .012 to .015
Ring groove clearance-- .001
Piston pin fit in connecting rod bushing--- .0003 max
Pin in piston-- .0002 to .0005 shrink fit
Pistons assembled with split side toward left side of engine.
Connecting rod side play on crankshaft-- .008 to .012
Connecting rod clearance between piston bosses-- .040 to .053
Connecting rod clearance on crankshaft diameter-- .001
Connecting rods assembled with oil dips toward camshaft
Crankshaft end play-- .002 to .004
Main bearing clearance-- .001
Camshaft bearing clearance --.003 max
Camshaft end play taken upby tention of spring in front cover. Spring tension 35 lbs
Valves to push rods clearance-- .010 to .013
Exhaust valves in valve guides -- .002
Intake valves in valve guides -- .001 to .0015
Valve lift -- .287
Push rod clearance --.0015
Timing gear backlash -- .004
End play of water pump shaft -- .006 to .010
Spark plug gap -- .035
Ready for Flight !!
Did you notice the car in the background, that has
a Pietenpol Engine in it  ??