Aluminum LS Engine Gen 4 5.3 243 Heads, Diamond Forged Pistons, Bullet Racing Cam
Ships from Pennsylvania. GM L33 Aluminum 5.3 LS V8 engine built by Philadelphia Racing Engines for street, race, all around high performance use. GM LS engine family: LS1, LS2, LS3, LS6, LM7, LQ4, LQ9, L76, L92, L98, 4.8, 5.3, 5.7, 6.0 liter V8
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GM Gen 4 Aluminum 5.3 LS V8 engine built by Philadelphia Racing Engines for street, race, all around high performance use
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This engine has not been on a dyno, however this camshaft combination has been tested in a 5.3L and produced 442 horsepower at 6,200 rpm and 412 lb-ft of torque at 5,000 rpm
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Compression is 10.2 to 1, higher than the stock 9.9 to 1, so performance should be slightly higher
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80 pounds lighter than a cast iron block LS engine!
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Stock crankshaft machined .010 main bearings, .010 rod bearings, 58x reluctor
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243 Casting Cylinder heads machined with 2.0 intake valves, 1.55 exhaust valves, 64.45cc chambers
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Pistons: Diamond forged, 11592R1
- Bore 3.780", Stroke 3.622", Rod 6.098"
- Compression distance: 1.331"
- 400 grams
- -2.0cc valve reliefs
- 10.2 compression
- 3D milling on piston crowns
- Offset pins for quiet operation
- 1.0mm x 1.2mm x 2.8mm ring package
- Side gas ports for better ring seal
- Top ring down dimension: .250"
- Premium 8620 .945 x 2.500 .185 wall wrist pins
- Moly skirt coating for friction loss and skirt wear protection
- Valve pocket depth: 0.176" intake and .103" exhaust
Camshaft
- Bullet Racing Hydraulic Roller
- CLS 273/281-12HL
- Duration at .050: 223 / 231
- Lobe Lift: .361 / .363
- Valve Lift: .614 / .617
- Lobe Separation: 112
- Camshaft degree: 109
- Valve Springs: Pac 120 pounds on valve seat
- Timing chain: Rollmaster single roller
- Head gasket: Victor MLS
ENGINE BUILD SHEET
Name:
Parts For Speed
Engine:
5.3L LS Alum Block
Date:
2/3/19
Cylinder Block:
5.3L Alum.
Connecting Rods:
Stock
Crankshaft
Stock
Cylinder Heads:
Stock
#243 Cathedral Port
LS1
I-2.000 , E-1.55
65cc
Pistons:
11592R1
Bore-3.780 Comp Height 1.331
Vol.-2.12cc Pin 2.500
400 Grams
Diamond Forged
Rings:
Diamond
Top -.0405
Sec.- .0475
Oil - .1120
Oil System:
10355 Melling
Performance
Camshaft:
Bullet
CLS 273/281-12HL
Dur. .050 223 – 231
Lobe Lift .361 - .363
Separation - 112
Lifters:
HLY
Cam Drive:
Roller Master
Valve Spring Retainers:
Stock
Valve Springs:
PAC
120 #S On Seat
Pushrods:
Stock
Rocker Arms:
Stock
Valve Lash (Hot):
Intake
Exhaust
HLY
HLY
Harmonic Balancer:
Intake Manifold:
Induction System:
Head Gasket:
Victor MLS
Intake and Exhaust Gaskets:
Bearings:
Main – MS2199p .010 #1-.0018,#2-.002,#3-.002,#4-.0018,#5-.0022
Rods- CB663p .010 #1-.002,#2-.002,#3-.0025,#4-.0022,#5-.0022,#6-.0025,#7.0025,#8-.0025
Torque Specs:
Mains:
Rods:
Heads:
Intake:
Rocker Arm Studs:
Damper:
Cam Gear:
Flexplate:
Lube:
Piston to Valve Clearance
Cylinder
Intake Clearance
Exhaust Clearance
1
.150
.200
2
.150
.200
3
.150
.200
4
.150
.200
5
.150
.200
6
.150
.200
.7
.150
.200
8
.150
.200
Camshaft Degree - 109________°
Cylinder 1
Bore Diameter:
Piston Diameter
Skirt Clearance:
Piston Ring End Gap:
Top
2nd
Oil
3.780
3.745
.0035
Deck Height:
Oil Clearance:
Pin Oil Clearance:
.015
.022
STD.
.010
.0008
Cylinder 2
Bore Diameter:
Piston Diameter
Skirt Clearance:
Piston Ring End Gap:
Top
2nd
Oil
3.780
3.745
.0035
Deck Height:
Oil Clearance:
Pin Oil Clearance:
.015
.022
STD.
.010
.0008
Cylinder 3
Bore Diameter:
Piston Diameter
Skirt Clearance:
Piston Ring End Gap:
Top
2nd
Oil
3.780
3.745
.0035
Deck Height:
Oil Clearance:
Pin Oil Clearance:
.015
.022
STD.
.010
.0008
Cylinder 4
Bore Diameter:
Piston Diameter
Skirt Clearance:
Piston Ring End Gap:
Top
2nd
Oil
3.780
3.745
.0035
Deck Height:
Oil Clearance:
Pin Oil Clearance:
.015
.022
STD.
.010
.0008
Cylinder 5
Bore Diameter:
Piston Diameter
Skirt Clearance:
Piston Ring End Gap:
Top
2nd
Oil
3.780
3.745
.0035
Deck Height:
Oil Clearance:
Pin Oil Clearance:
.015
.022
STD.
.010
.0008
Cylinder 6
Bore Diameter:
Piston Diameter
Skirt Clearance:
Piston Ring End Gap:
Top
2nd
Oil
3.780
3.745
.0035
Deck Height:
Oil Clearance:
Pin Oil Clearance:
.015
.022
STD.
.010
.0008
Cylinder 7
Bore Diameter:
Piston Diameter
Skirt Clearance:
Piston Ring End Gap:
Top
2nd
Oil
3.780
3.745
.0035
Deck Height:
Oil Clearance:
Pin Oil Clearance:
.015
.022
STD.
.010
.0008
Cylinder 8
Bore Diameter:
Piston Diameter
Skirt Clearance:
Piston Ring End Gap:
Top
2nd
Oil
3.780
3.745
.0035
Deck Height:
Oil Clearance:
Pin Oil Clearance:
.015
.022
STD.
.010
.0008