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Supercharged 396cid V8 – Engine Specifications

One of the main reasons why I purchased the ’90 Corvette from Texas was the newly installed performance engine. It was built by Agostino Racing Engines in Pickering, Ontario and installed by The Corvette Shop, Inc. in Dallas, Texas. It’s an L98 TPI based small block V8 with the following specifications:

ARE L98 – 396

Engine Displacement of 397 cubic inches w/ 9.01:1 Compression Ratio

Designed for 14lbs of boost and nitrous oxide

  • Connecting Rods:
    • Rod Make/Type: Eagle
    • Length (Center to center): 5850
    • Side Clearance: 021-022
    • Wrist Pin Bore Diameter: .927
    • Wrist Pin Clearance in Rod: .001
    • Rod Bolt Make/Size: 8740 ARP Eagle
    • Rod Bolt Torque: 70 ARP
  • Engine Bearings:
    • Main Bearing Make/Type: 909 P
    • Rod Bearing Make/Type: 663 H
    • Camshaft Bearing Make/Type: FM 1235
  • Crankshaft:
    • Crankshaft Make/Type: Callies
    • Stroke: 3.875
    • End Play: 0.007
    • Nose/Flange: SBC
    • Bolt Pattern: Gen II
  • Compression Ratio:
    • Dome (-) or Dish (+) Volume: +27.8 cc
    • Ring Land Volume: 2 cc
    • Deck Volume: -.008 Average
    • Head Gasket Volume: 9.1 cc
    • Head Chamber Volume: 66 cc
    • Total Volume: 104.99 | 8.9 cr
  • Pistons / Rings:
    • Piston Make/Type: Diamond
    • Compression Height: 1.200
    • Wrist Pin Length: 2.950
    • Wrist Pin Diameter: 0.927
    • Wrist Pin Clearance (in piston): .0008
    • Wrist Pin Retainer Type: Dbl Lox
    • Ring Make: Manley
      • Top Ring Type: Molly
        • Width: 1/16
        • Gap: .022
      • 2nd Ring Type: Ductile
        • Width: 1/16
        • Gap: .018
      • Oil Ring Type: SS
        • Width: 3/16
    • Engine Balance Data:
      • Piston Weight (grams): 478
      • Wrist Pin: Internally Balanced
  • Camshaft:
    • Make of Cam: Cloyes
    • Cam Number: CC SR 48725 / 48735 SR 114
    • Cam Material: Billet
    • Cam Lob Separation: 114 / 111
    • Duration @ .050”: 230 Int / 236 Ext
    • Lobe Lift: .369 Int / .377 Ext
    • Rocker Ratio: 1.6 Int / 1.6 Ext
    • Gross Lift: .590 Int / .603 Ext
    • Valve Lash: .016 Int / .016 Ext
  • Rocker Arms:
    • Make: Crane
    • Material: Aluminum
    • Ratio: 1.6 Int / 1.6 Ext
    • Offset: 0 Int / 0 Ext
  • Lifters:
    • Make: Isky
    • Diameter: Stock
    • Offset: 0 Int / 0 Ext
  • Valve Springs:
    • Make/Type: Comp Cams 977-16
    • Material: Tool Steel
    • Inner Diameter: 1.55
    • Seat Pressure: 135
    • Open Pressure: 415
  • Pushrods:
    • Make: Comp Cams
    • Length: 8.950
    • Diameter: 5/16
    • Wall Thickness: .080
  • Retainers/Keepers:
    • Make/Type: Comp Cams 740-16
    • Material: Steel 10’
  • Cylinder Heads:
    • Air Flow Research Kit 1041
    • 195 Corvette Plug 68cc heads (street assembly)
      • Street 2.020 – #10550
      • 600 Street –Rev#9000
      • Hydraulic 1.450 springs
      • Steel 10 degree retainers
      • 10 degree valve locks
      • Rubber valve seals
      • Shim .015 1.450 OD
      • Guide plates –AFR SB
      • 3/8 rocker studs – standard
      • AFR SB bronze guides .502
      • AFR 2.200 intake seats
      • AFR 1.695 exhaust seats
      • Helicoils 7/16 14×1.2
      • Center bolt valve cover
      • Flat mill and correct intake to 58cc
      • HS roller rockers 3/8 1.6
    • Head Gasket:
      • Type/Thickness: 10036 .041 – 9.1cc
    • Parts/Work:
      • Moroso Oil Pan
      • Right side head drill/tap for sending unit

All of this is fed by a Procharger D-1 supercharger and is controlled by a FAST XFI fuel management system.

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