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ATK LS02 Chevy LS3 415CI Stroker Base Engine 620+HP

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#35020050

ATK LS02 Chevy LS3 415CI Stroker Base Engine 620+HP

Bore/Stroke: 4.000” x 3.750”
Displacement: 377CI
Crankshaft: Scat 4340 forged external balance rear of the crank/internal balance front of the crank

$10,599.00

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Product Summary

Long Block Crate Engine Type, 10.3:1 Compression Ratio

Bore/Stroke: 4.000” x 3.750”
Displacement: 377CI
Crankshaft: Scat 4340 forged external balance rear of the crank/internal balance front of the crank
Rods: Scat 4340 forged H beam with ARP 8740 bolts
Pistons: 2618 Forged -16cc dished with 2 valve reliefs

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Key Specs

Crate Engine Type	Long Block
Compression Ratio	10.3:1
Engine Displacement	415 cu. in.
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Aluminum

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ATK Engines LS02 Details

This LS3/415CI Stroker with LS3 Aluminum heads is making 620HP+. Expect big mid to upper end power, will have a noticeable idle. For optimal Performance you will need headers, chassis dyno tune and 36lb injectors. Your engine may not necessarily come with all components listed, but they are listed as our recommendations of parts to run for optimal performance.

Engine Specifications:

HP: 620

TQ: 550

Block: New GM LS3 Aluminum

Bore/Stroke: 4.065 x 4.000

Displacement (cu.in): 415ci

Crankshaft: Manley 4340 forged internally balanced 58 tooth reluctor

Rods: Manley 4340 forged H beam with ARP 8740 bolts

Pistons: Manley 2618 forged 10.3:1 compression

Rings: Moly

Camshaft: Hyd. Roller

Cam Specs: 240/256@50 .625/.625 113LSA

Timing Chain: Billet single roller

Cylinder Heads: LS3 aluminum 68.4cc/260cc 2.16/1.59 stainless steel valves

Rocker Arms: OE 1.7 ratio with bushing upgrade

Recommended Components:

Oil Pump: Melling STD Volume high pressure

Balancer: PowerBond #PB1480-SS SFI internally balanced

Intake Manifold: Edelbrock victor Jr. #28457

Carburetor: Quick Fuel 850cfm mechanical secondary’s #Q-850

Spark Plugs: Autolite #104

Spark Plug Wires: MSD #5574

Engine Info:

Flexplate/Flywheel: Internally balanced

Water Pump: Per application

Oil: Conventional / Non Synthetic 10W40

Oil Filter: Wix or K and N

Timing Control: We recommend MSD #6014 with a baseline of: 10deg @ 0RPM, 20deg @ 500RPM, 26deg @ 1500RPM and 31deg @ 2500RPM-6500RPM.

Spark Plug Gap: .040”

Firing Order: 18726543

Octane: 91+

Stall Converter: 3000+

Exhaust: 1 ¾” Headers

Notes: A PCV valve must be ran; please follow the valve cover instructions provided. You must also run an Air-Oil separator system such as the Moroso #85487 to capture the excess crankcase vapors LS engines are known for. If you are not running a MAP Sensor, the MAP timing option in the timing control box must be zeroed out all the way across. Failure to do so will allow the controller to add timing which can lead to detonation. You must also run some sort of a steam line kit that dumps to your water pump, radiator or radiator hose; we recommend a 4 corner setup like the Trick Flow #TFS-306SB601. This allows air pockets/hot spots to escape the heads and can also be used to purge out trapped air when filling the radiator for the first time.

Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.

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Warranty (ATK Engines)

Technical Information (ATK Engines)

CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

ATK Engines LS02 Specifications

KEY SPECS
MFG. Part #	LS02
Brand	ATK Engines
Crate Engine Type	Long Block
Compression Ratio	10.3:1
Engine Displacement	415 cu. in.
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Aluminum
Piston Material	Forged Aluminum
Carburetor Included	No
Intake Manifold Included	No
Distributor Included	No
Valve Covers Included	Yes
Cylinder Heads Included	Yes
Throttle Body Included	No
Timing Cover Included	No
Oil Pan Included	No
Water Pump Included	Yes
Harmonic Balancer Included	No
Flexplate Included	No
Flywheel Included	No
Air Cleaner Included	No
Spark Plugs Included	No
Spark Plug Wires Included	No
Computer Included	No
Wiring Harness Included	No

GENERAL
Combustion Chamber Volume	68cc
Bore x Stroke (in)	4.000" x 3.750"
Material Type	Iron
Sold in Quantity	Each

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