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Dart Big M Sportsman Block 4.600 Cylinder Bore Diameter

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  • Dart Big M Sportsman Block 4.600 Cylinder Bore Diameter

Dart Big M Sportsman Block 4.600 Cylinder Bore Diameter

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Quick Overview

Dart Big M 4.600 Block

Availability: Out of stock

$2,492.26

Details

Dart engineered the Big M to be the strongest, most reliable, and easiest to build big-block on the market. The 4 bolt splayed caps available, in ductile iron and steel, and the thick main webs make the bottom end the Strongest in the Industry. We redesigned the lubrication system to create a true priority main system that oils all of the main bearings before the lifters for extra reliability. Our stepped main oil gallery (9/16 to 1/2 to 7/16) increases the flow of oil to the crank at high rpm, and our front oil crossover eliminates internal oil leaks around the distributor shaft. The result: more oil at the bearings and pushrods where its needed, and less power-robbing crankcase windage.

We added two slotted head stud bosses on both sides of the lifter valley so you can use studs instead of hard-to-install bolts to take the place of the missing head bolts. SEE BELOW for Inner Stud Kit

  • 9.800 or 10.200 deck
  • 4.600 bore (4.592 unfinished to allow honing)
  • Ductile Iron main caps
  • For 2pc rear seal
  • Mains are finish honed
  • Decks are +/- .002
  • Cam bore is finish honed
  • Lifter bores are honed (always check clearance)
  • 4 bolt main caps - center 3 are splayed
  • Mechanical Fuel Pump provision
  • Uses +.300 tall lifters (GEN VI style)
  • Oil filter pad is drilled & tapped for an external oil pump
  • Blind head bolt holes do not go through to water

NOTE: Sportsman Blocks Do Not come with cam bearings, freeze plugs or dowels - SEE BELOW to order Kit

For BLOCK with ROTATING ASSEMBLY click here

Additional Information

Manufacturer Dart

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