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HT383E Engine Specifications:
Displacement: ................................................... 383 cubic inches
Bore x Stroke: ................................................... 4.005 inch x 3.80 inch
Compression ..................................................... 9.1:1 nominal
Block: ................................................................ Cast iron, four-bolt intermediate mains
Cylinder Head: .................................................. Cast iron Vortec
Valve Diameter (Intake/Exhaust): .............. 1.94"/1.50"
Chamber Volume: ............................................. 64cc
Crankshaft: ........................................................ 4340 Forged steel, 1 piece rear seal
Connecting Rods: ............................................. 5.7" Forged, powdered metal, 3/8" studs
Pistons: ............................................................. Hypereutecic, 244-T5 aluminum alloy
Rings: ................................................................ Plasma Moly
Camshaft: .......................................................... Hydraulic roller tappet
Lift: .............................................................. .431" intake, .451" exhaust
Duration: ..................................................... 196° intake, 206° exhaust @.050" tappet lift
Centerline: .................................................. 108° ATDC intake, 116° BTDC exhaust
Rocker Arm Ratio: ............................................ 1.5:1
Timing Chain: .................................................... 8 mm single roller design
Oil Pan: ............................................................. 5-quart (w/ new filter)
Oil Pressure (Normal): ...................................... 40 psi @ 2000 RPM
Recommended Oil: ........................................... 10W30 Synthetic (after break –in)
Oil Filter: ........................................................... AC Delco part # PF25 or PF52 (4WD)
Valve Lash: ........................................................ 1/2 turn down from zero lash
Fuel: .................................................................. Unleaded - 87 (R+M/2)
Maximum Engine Speed: ................................. 6000 RPM
Spark Plugs: ..................................................... R44LTS
Spark Plug Gap ................................................. .040"
Spark Timing: .................................................... Non Adjustable (crankshaft sensor)
Firing Order: ...................................................... 1-8-4-3-6-5-7-2
Information may vary with application. All specifications listed are based on the latest production information
available at the time of printing.
HT383E Re-Power Kit
TITLE
19132024
REV 05AU14
PART NO.
7
27
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