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Chevrolet and GM Performance Parts - GMR 350/400 CIRCLE TRACK ENGINE
     This is a factory sealed crate engine package, complete from intake manifold, stamped steel valve covers with racing style breathers, and 8 quart dual kick-out circle track racing oil pan.
     Keys - scperformanceeng, gmperformanceeng, or gmgoodwrencheng for SC, GM, or Goodwrench engines. Use allengine for a complete list of all three.
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GMPP ZZ4 Main Page GMPP Fast Burn 385
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We have more GM and Chevrolet Performance Engines available.
We have more GM Stock Replacement Long-block Goodwrench Engines available.
We have more “Gen 3” and “Gen 4” Design Engines available. (LS1, LS2, LS6, LQ4, LS7)

350 HP - 350 HO Circle Track 355 HP - ZZ4 Circle Track 400 HP - Fast Burn 385 Circle Track

350 Circle Track Engine 350 Circle Track Engine
88958604 GMR 350/400 Circle Track Engine
Great racing power at a reasonable cost (400 HP at 5500 RPM - Torque 400 @ 4500 RPM)
     This is a factory sealed crate engine package, complete from intake manifold, stamped steel valve covers with racing style breathers, and 8 quart dual kick-out circle track racing oil pan. The Fast Burn 400 engine is a great value with the 1053 forged steel crankshaft, aluminum heads with 2.00”/1.55” valves, hydraulic roller lifters, and an HEI distributor. GM uses the 385 horsepower Fast Burn 385 as the base for this engine.
Technical Notes: These engines are sealed at the intake manifold, cylinder head, front cover, and oil pan with special twist off bolt heads. The 400 HP @ 5500 RPM was derived from a superflow dyno using a 4 barrel 650 cfm Holley carburetor P/N 80541-1, 32” long by 1-5/8” to a 1-3/4” stepped header with a 3” collector, and 92 octane unleaded gasoline. This engine package DOES NOT include a water pump. Oil pan clears most GM rear steer chassis with stock engine location. Oil pan is 7” deep at sump.

Horsepower: 400 @ 5,500 RPM
Torque: 400 ft./lbs. @ 4,500 RPM
Max. Rec. RPM: 5,800
Compression Ratio: 9.6:1
Block: 10105123 Cast iron four bolt with 1-piece rear main seal.
Crankshaft: 12556307 Forged 1053 Steel
Connecting Rods: 10108688 PM Steel
Pistons: 10159436 High silicon aluminum with offset pins.
Piston Rings: 12528817
Camshaft: 10185071 Hydraulic Roller; Lift: .474” I, .510” E; Duration @ .050: 208° I, 221° E
Timing Chain: 14088783
Cylinder Heads: 12464298 Aluminum, 62cc combustion chambers.
Intake Valves: 12555331 2.0”
Exhaust Valves: 12551313 1.55”
Valve Springs: 12551483 LT4 Chrome Silicon
Rocker Arms: 10089648 1.5 Ratio
Intake Manifold: 12496822 Aluminum High Rise, Single Plane
Distributor: 01104067 GM HEI
Valve Lash: Zero
Spark Plugs: FR5LS Gap @ .035, Rapid Fire #5 Gap @ .045
Ignition Timing 10° BTDC @ 800 RPM; Max. 32° Total @ 4,000 RPM with vacuum advance disconnected.
Fuel: 92 Octane Unleaded Gasoline
Lifters: Hydraulic Roller
Oil Pan: 25534354 8 Quart Black Powder Coated Circle Track With Oil Filter. It includes a full louvered windage tray, three crankshaft scrapers, six trap doors, two runners, oil temp fitting provision, oil level plug, 7” deep sump, and a 3-1/2” kickout on both sides.
Valve Covers: 25534359 Valve cover kit with breather tube
Oil Breather: 25534355 Valve cover breather kit
Rocker Arm Nut: 25534352 Special, ”kool nut design”
Technical Notes: Carburetor, spark plug wires, starter, oil filter and oil filter adaptor, and exhaust manifolds are not included. Distributor P/N 01104067 or melonized distributor gear P/N 10456403 must be used on all crate engines with steel camshafts.