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Dart LS Next Engine Blocks 31837211

Dart 31837211 - Dart LS Next Engine Blocks

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Engine Block, LS Next, Cast Iron, 4.125 in. Diameter Bore, 4-Bolt Mains, Chevy, LS, Each

Estimated Ship Date: 12/26/2014 (if ordered today) Would you rather pick it up? Select Location

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Brand: Dart
Manufacturer's Part Number: 31837211
Summit Racing Part Number: DRT-31837211

Main Journal Type: LS mains
Engine Block Style: Stock/OEM standard deck
Deck Height (in): 9.240 in.
Cylinder Bore as Shipped: 4.115 in.
Cylinder Bore Diameter: 4.125 in.
Engine Block Material: Cast iron
Main Bolt Style: 4-bolt
Main Caps Included: Yes
Main Cap Material: Steel
Main Cap Fasteners Included: Yes
Main Bearings Included: No
Rear Main Seal Style: 1-piece
Finished Cylinder Bores: No
Raised Cam Location: No
Cam Bearings Included: No
Freeze Plugs Included: Yes
Quantity: Sold individually.
Notes: Block bores are .10 undersized to allow for piston set up.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

These Dart LS Next engine blocks integrate the robust heritage of a traditional Chevy small block with the performance potential of the late model LS engine architecture. They are designed to rectify some of the LS's more noticeable shortcomings on the bottom-end, while still supporting the high-flow and efficient cylinder heads developed for the Gen III and IV platforms. The blocks include beefy 4-bolt steel main caps and the outer bolts are splayed on caps number 2, 3, and 4. They feature full main webbing for increased bottom-end strength and 7/16 in. main cap bolts are used. Even though the crankcase rails were fashioned with traditional Chevy logic, oil pans specific to this block will be needed. Custom oil pans will also allow for larger capacity, full-sump pans, or customers can still opt for a dry-sump system. The Dart LS Next engine blocks feature both Gen I and Gen III styles of motor mounts, which will help facilitate engine swaps into a variety of vehicles. They have starter mounts on both sides, again smoothing the way for installation in different applications. Dart set the deck height at 9.240 in. with a full 5/8 in. thick deck, and they can support a crankshaft stroke up to 4.100 in. The cylinder barrel length is .375 in. extended, giving the effective equivalent of a taller 9.615 in. deck, in terms of supporting piston travel. The blocks are available in either a 4.000 in. or 4.125 in. bore, and the Siamese cylinders can be safely bored to 4.200 in. Dart also increased the head-bolt size to 7/16 in. The head bolt holes are blind, meaning that they don't extend into the water jackets, and the standard six-bolts-per-cylinder head pattern is retained. The Dart LS Next engine blocks feature extended water jackets on the number 1 cylinder for improved cooling. LSX-style lifter bosses and dog bone provisions are provided, and the standard cam bores can be increased to accommodate 60mm babbit or 55mm roller bearings.


Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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