How big is a big M Dart block?
Dart engineered the Big M to be the strongest, most reliable, and easiest to build big block on the market. With deck heights of 9.800” and 10
What kind of cylinder block does dart use?
We chose a Dart Machinery “Big M” cylinder block equipped with all the best design features and attending hardware for a high RPM, 1,000 HP+ package. Note in particular the following features appropriate to our this application and intended power level: Big M Sportsman version (shown) comes with 4-bolt ductile iron caps on all five main bearings.
How does priority oiling work on a dart Big M Block?
Priority main oiling is fed directly from the main oil gallery (B) to the main bearings via a direct passage. Lifter galleries (A) are independently supplied from the front of the block as opposed to the rear in a stock block. Main oil gallery accepts a ¼-inch pipe plug both front and rear.
What kind of pins do I need for a dart block?
Blocks accept standard BBC core plugs. Oil pump mount on rear main cap must be plugged for dry sump oiling applications. Dart recommends .250-inch oil pump dowel pins. Many commercially available rebuilder pins are only .246-inch. Dart cutaway view shows passage from priority main oil gallery directly to main bearing housing.
We chose a Dart Machinery “Big M” cylinder block equipped with all the best design features and attending hardware for a high RPM, 1,000 HP+ package. Note in particular the following features appropriate to our this application and intended power level: Big M Sportsman version (shown) comes with 4-bolt ductile iron caps on all five main bearings.
Priority main oiling is fed directly from the main oil gallery (B) to the main bearings via a direct passage. Lifter galleries (A) are independently supplied from the front of the block as opposed to the rear in a stock block. Main oil gallery accepts a ¼-inch pipe plug both front and rear.
Blocks accept standard BBC core plugs. Oil pump mount on rear main cap must be plugged for dry sump oiling applications. Dart recommends .250-inch oil pump dowel pins. Many commercially available rebuilder pins are only .246-inch. Dart cutaway view shows passage from priority main oil gallery directly to main bearing housing.