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What Are the Specifications for the Discontinued BluePrint Engines BP3315CT 331 Ford Small Block?

 Is the BP3315CT Still Available?

No. The BP3315CT has been discontinued. Although this engine is no longer manufactured, many remain in service and require specification information for maintenance, repairs, and rebuild work. What Are the Basic BP3315CT Engine Specifications? The BP3315CT was built using a Ford roller-cam 302 platform and included:

  • 331 CID Ford Small Block
  • .040" overbore
  • Hydraulic roller camshaft
  • Aluminum cylinder heads
  • Forged I-beam connecting rods
  • Cast steel stroker crankshaft
  • Hypereutectic pistons
  • One-piece rear main seal
  • Side-mounted dipstick block
  • Dual sump oil pan
  • Roller lifter provisions
  • External balance front and rear
What Firing Order Does the BP3315CT Use? The BP3315CT uses the: 1-3-7-2-6-5-4-8 firing order This is the same firing order commonly used on many Ford roller-cam and 351W-style combinations. What Camshaft Does the BP3315CT Use?

Camshaft Specifications

  • Camshaft Part Number: 4062YB
  • Cam Type: Hydraulic Roller

Timing Set Information

  • First Choice Timing Set: SAG73004-3
  • Second Choice Timing Set: Cloyes C3057X

Camshaft Installation

The camshaft must be:
  • Degreed during assembly
  • Installed at 108° Intake Centerline (ICL)
Proper cam degreeing is critical for achieving intended power output, idle quality, and valve timing events. What Lifters Does the BP3315CT Use? Approved hydraulic roller lifters include:
  • HL-2205
  • HR373
  • SBVL100
  • TOPA2205
The lifters utilize dog-bone style roller lifter guides/yokes. What Rotating Assembly Components Are Used?

Crankshaft

  • SCAT 9-302-3250-5400-2123
  • Cast steel stroker crankshaft

Connecting Rods

  • Forged I-beam rods
  • BP347 / YFICR5400B rod assemblies

Pistons

  • SILKB355.040
  • 10cc dish piston
Is the BP3315CT Internally or Externally Balanced? The BP3315CT is: Externally balanced front and rear using a 28.4 oz imbalance. Important balance information:
  • Requires 28.4 oz balance components
  • Balance procedure utilizes:
    • FW1
    • B2
Using incorrect balance components may result in engine vibration and premature component failure. What Ring Gaps Should Be Used? Recommended ring gaps:
  • Top Ring: .018"-.028"
  • Second Ring: .022"-.032"
Always verify ring gap during assembly. What Are the Bearing Clearance Specifications?

Main Bearing Clearance

  • .001"-.0029"

Rod Bearing Clearance

  • .001"-.0029"
Proper bearing clearances are critical to maintaining oil pressure and bearing life. What Are the Main and Rod Torque Specifications?

Main Caps

  • 75 ft-lbs

Connecting Rod Bolts

  • 45 ft-lbs with moly lubricant

Rod Orientation

  • Bearing tangs face inward
What Pistons-to-Wall Clearance Should Be Used? The BP3315CT specification is:
  • .0025"-.0040" piston clearance
Cylinder bore finish should be maintained between:
  • 4.0380" - 4.0390"
What Cylinder Heads Are Used?

Head Part Number

HP9008

Head Features

  • Aluminum construction
  • Uses new head bolts during assembly
  • Compatible with FEL-PRO 9333PT1 head gaskets

Head Bolt Torque

  • 70 ft-lbs with torque wrench
What Are the Rocker Arm Specifications?

Rocker Arm Components

  • ELGR889 rocker arms
  • ELGRM1776 rocker pivots

Rocker Stud Torque

  • 25 ft-lbs
  • Use sealant on intake-side studs

Valve Adjustment

  • Set using a thin preload gauge
What Oil Pressure Should I Expect? Minimum oil pressure specification:
  • 40 PSI
Oil pressure can vary based on oil type, bearing clearances, temperature, and operating RPM. What Power Output Was the BP3315CT Designed to Produce? Minimum dyno targets:
  • 375 horsepower
  • 390 lb-ft torque
Actual vehicle output varies based on exhaust, ignition timing, fuel quality, and vehicle configuration.