Dart LS Next²

The ACE LSNext2 - Sick Week 2023 Champion & Ultra Street Record holder

Current 2026 Season Ultra Street Class Blower & LS Record holder - 4.376 @ 159mph with a 94mm ProCharger!

Sick Week 2023 Champion - Michael Westberg's S10 pick-up truck (4.06 @ 183mph / 6.39 @ 224mph) with a 6.464 @ 214mph week average!

This engine is for customers with a goal of 2400-2800hp. An ideal option for Drag & Drive and Ultra Street, X275, and No Time classes. 

Attention to Detail

• Our cast engine builds receive the same meticulous treatment as our billet builds
• Fully CNC machined
• Engine Specification File provided
• A variety of options all with top branded parts

Our Dart LS Next² Long Blocks include, but not limited to the following precision machining/blueprinting:

• Balancing
• CNC Block Machining
• CNC Sunnen SV-30 vertical hone with diamond stones
• Cylinders double torque plate diamond honed for correct piston to wall clearance and surface finish
• Surface finish honed according to fuel and power adder
• Detailed Engine Build Specifications File

Spec:

• 2400-2800hp
• Bore: 4.125"
• Stroke: 3.750″
• 2.750″ Cleveland Mains
• Standard Deck
• Engine size: 400ci

Short Block Components:

• Dart LS Next2 Iron Block
• Winberg Billet Crankshaft
• Clevite Main Bearings
• Clevite Rod Bearings
• Billet Aluminum Rods
• Custom Ross Racing Pistons
• Total Seal Piston Rings

Long Block Components:

• Cylinder Heads -
  • CID LS7 - H2O, Wet Deck, or Solid
  • MAST LS7
• Top Fuel Hoops
• Copper Head Gaskets
• Custom Camshaft - Solid or Hydraulic Roller
• PAC or PSI springs
• Manton push rods
• Crower or Jesel Rockers
• Johnson, BAM, or Jesel Lifters
• ATI Damper
• RCD Billet Gear Drive
• ARP Hardware
• GM Rear timing cover & gasket
• Billet valley cover
• ACE Racing Engines Billet valve covers

Oil System options (in order of preference):

• Fluidworks Dry Sump System
• Fluidworks External wet system and custom pan