Boosting a 482ci Ford SOHC Cammer
BUILDING THE CAMMER SHORT BLOCK
As a limited use street engine, it is still expected to run hard when called upon. The pistons are actually for a normally aspirated, Chrysler Hemi, injected A/Fuel dragster combination (see photo lower left). The minimal dome provides the desired 9.5:1 compression ratio and the upper ring grooves are configured with horizontal gas ports to improve ring seal. Because of the anticipated loading, these dragster pistons have broader skirt contact with less ovality, hence they are well suited for a turbo application.
Working closely with Duttweiler, racer Lyle Larson helped spec the piston combination. CP techs noted that the requirement almost exactly matched their A/Fuel dragster pistons for injected Chrysler Hemi's that run low 5's at 275 mph. The domes ideally matched the chambers in the Pond aluminum cylinder heads. Because these pistons are made for aluminum rods which are wider than steel rods on the pin end, the pin bosses are spread too far apart. This could compromise piston stability and place additional bending loads on the pin. To correct this, Carrillo made a special set of rods that are wider on the small end to match the dragster pin bosses.
To accommodate the required valve reliefs and high thermal environment, the ring pack is located farther down the piston and the top ring grooves are fitted with horizontal gas ports to ensure optimum ring function. The top ring grooves are hard anodized to protect against micro-welding and the skits are treated with an anti-scuff dry film coating.
The short block is anchored by a fully counterweighted Sonny Bryant billet crankshaft with a 4.250-inch stroke. While this is a dry sump lubricated engine, the counterweights are nevertheless knife-edged to cut through any errant oil film and the crank pins are drilled to lighten the crank. Like every Bryant crankshaft, it is a bulletproof work of art and was chosen to endure Duttweiler power levels without distress. Due to the extra stroke length, the overlap between the crank pins and main journals is reduced.
The Bryant crank design provides the most possible beef to accommodate this and ensure maximum strength. The crank has 2.75-inch main jounrals and big block Chevy syle 2.100-inch rod journals. The big end on the custom Carrillo connecting rods is standard for this application. Engine builder Duttweiler also noted that while Bryant cranks are considered the absolute best in the business, he is also pleased at how fast they turn around a custom crank order.
SOHC CAMMER CYLINDER HEAD PREP
The RPM aluminum 427 SOHC Cylinder Head from Robert Pond Motorsports is a direct replacement for the original SOHC head. These heads are CNC ported on both the exhaust and intake ports with flow delivery about 15% better than original stock Ford ports. The RPM heads have a half inch thick deck and beefed up cam towers. They have five additional bolt holes added to the exhaust flange for better gasket seal; a useful feature on a high heat turbo application. For this severe duty application, the ports were polished and the guides and valve seats were carefully checked for accuracy.
DRY SUMP OILING SYSTEM

ENGINE SPECS
Engine | Aluminum Ford SOHC Cammer |
Displacement | 482ci |
Bore & Stroke | 4.250 x 4.250 |
Compression Ratio | 9.25:1 |
Horsepower | 1052 @ 6700 rpm |
Torque | 956 lb-ft @ 5100 rpm |
Test Boost | 10 psi |
Block and Cylinder Heads | Robert Pond Motorsports |
Crankshaft | Sonny Bryant Billet (2.75 mains x 2.1 rods) |
Connecting Rods | Carrillo (custom with 6.7-inch centers) |
Pistons | CP (A/Fuel Dragster Hemi pistons) |
Rings | Total Seal, .043 steel top, .0625 cast second, 3/16 oil |
Camshafts | Comp Cams |
Cam Specs | 244/254 @ .050-lift, .580 Int./.610 exe. Lift |
Springs, Pushrods, Retainers | Comp Cams |
Stub Drive | Comp Cams |
Rocker Arms | T&D Machine |
Gaskets | SCE .050 inch Copper |
Dry Sump Oiling System | Dailey Engineering |
Turbos & Wastegates | 88mm Precision Turbo |
EFI Controller | Holley Dominator |
Injectors | Holley, 160 lb/hr |
Intercooler & Intake Manifold | Bones Fab |
Headers | Bones Fab |
Turbo Plumbing | Bones Fab |
Hoses & Fittings | XRP |
Starter & Alternator | Power Master |
Water Pump & Flex Plate | Meziere |
Damper | ATI |
Engine by | Duttweiler Performance |
Bolts & Hardware | ARP |
Cylinder Head Prep | McKenzie Racing Heads |
Valves | Ferrea, 2.23 Ti Int., 1.900 High Temp Exe. |

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