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40 Big Block Chevy Engine - Godzilla Rat
Blueprint Data
Except as noted, all dimensions are in linear inches. For cam specs, see the separate Camshaft table.
Engine type: Chevrolet Mark IV big V-8
Engine builder: Speed-O-Motive
Measures And Volumes
Advertised displacement: 540 ci
Actual displacement: 540.7 ci
Bore x stroke: 4.50 x 4.25
Compression ratio (GM 049 heads): 9.90:1
Compression ratio (Brodix heads): 10.93:1
Main bearing clearance: 0.0025
Crankshaft thrust clearance: 0.0065
Rod bearing clearance: 0.0022
Rod side clearance: 0.018
Rod center to center: 6.385
Rod/stroke ratio: 1.50:1
Crank centerline to deck: 9.7805
Piston-to-bore clearance: 0.006
Piston compression distance: 1.270
Piston deck height: 0.005 below
Piston dome volume: 10 cc
Head gasket compressed volume: 11.2 cc
Chamber volume (GM 049 heads): 122 cc
Chamber volume (Brodix heads): 109 cc
Piston ring gap, 1st groove: 0.020
Piston ring gap, 2nd groove: 0.022
Piston ring gap, oil groove support rail: 0.015 minimum
Camshaft thrust clearance: 0 (Torrington bearing installed behind cam sprocket)
Piston-to-valve clearance: 0.100-plus
Valvespring seat pressure (Lunati PN 73121): 142 lbs @ 1.940
Valvespring open pressure: 402 lbs @ 1.250
Valvespring coil-bind: 1.130
Critical Tightening Values
Values not listed are the same as production.
With ARP assembly lube:
ARP capscrews in Scat rods: 70 lb-ft
ARP damper bolt: 80 lb-ft
ARP head bolts: 70 lb-ft
Dart main bolts: 105 lb-ft With SAE 30 engine oil
ARP oil pump stud: 65 lb-ft
Rocker studs: 60 lb-ft
Chevy Engine - Godzilla Rat»big block chevy parts specifications
540 Big Block Chevy Engine - Godzilla Rat
APPLICATION-SPECIFIC PARTS: GM OVAL-PORT HEADS
Fel-Pro Header gasket set 1.88x1.88 square ports 1410 1
Fel-Pro Intake gasket set Embossed, steel-core laminate, oval-port, 1.82 x 2.05 x 0.060, no heat 1210 1
GM Cylinder head Iron, 2.06/1.72 valves (used, supplied by Cylinder Head Exchange) Cast 353049 2
Lunati Valve seal For 3/8-stem valves and 0.530-od guides 78385 1 set
Manley Exhaust valve Pro Flow, 1.72 head, 3/8 stem 11517-8 1 set
Manley Intake Valve Race Flow, 2.065 head, 3/8 stem 11514-8 1 set
APPLICATION-SPECIFIC PARTS: BRODIX OVAL-PORT HEADS
Brodix Cylinder head Race-Rite, oval-port, 270cc intake, 115cc chamber 2060004 2
Fel-Pro Header gasket set 1.94 round ports 1411 1
Fel-Pro Intake gasket set Composite w/Printoseal, oval-port, 1.82 x 2.05 x 0.060, w/heat 1212 1
APPLICATION-SPECIFIC PARTS: LUNATI HYDRAULIC FLAT-TAPPET CAM
Edelbrock Intake manifold Performer 2-O, no EGR 2161 1
Holley Carburetor 4150 HP, 750-cfm, mechanical secondaries, gasoline 0-80528-1 1
Lunati Camshaft Hydraulic flat-tappet, Voodoo-series, ’65-’96 Chevrolet big V-8 60204 1
Lunati Lifter Hydraulic flat-tappet Micro-Trol, 0.842-od, ’55-’96 Chevrolet V-8 71817 1 set
Lunati Lubricant Assembly lubricant, 10-gram tube 99010 1
Lunati Pushrods Bracket Master II series, 3/8-inch od 80144 1 set
APPLICATION-SPECIFIC PARTS: LUNATI HYDRAULIC ROLLER CAM
Edelbrock Intake manifold RPM Air-Gap 2-O 7561 1
Holley Carburetor 4150 HP Ultra, 950-cfm, mechanical secondaries, gasoline 0-80676 1
Lunati Camshaft Hydraulic roller, Voodoo Retrofit, '65-'96 Chevrolet big V-8 60212 1
Lunati Lifter Hydraulic roller retrofit, 0.842-od, big-block Chevy 72431LUN 1 set
Lunati Pushrods Bracket Master II series, 3/8-inch od 80160 1
ock Chevy Engine - Godzilla Rat»big block chevy engine milodon oil pump
540 Big Block Chevy Engine - Godzilla Rat
Milodon Driveshaft Oil pump, Chevy big V-8 23060 1
Milodon Installation kit Extended main studs and nuts for supporting windage tray 81151 1
Milodon Oil pan Low-profile, ’65-’90 Mark IV, 7-quart, 8.5 deep sump, notched rails 30950 1
Milodon Outlet Engine coolant outlet, GM, early-style 65715 1
Milodon Pickup/inlet screen Extreme duty, Chevy big V-8 18201 1
Milodon Rear oil pan baffle Chevy big-V-8 32505 1
Milodon Valve covers Chevy Mark IV, tall-style, chrome 85600 1
Milodon Windage tray Diamond-Stripper design 32260 1
MSD Distributor Pro-Billet, Chevrolet V-8 85551 1
MSD Distributor clamp Billet hold-down clamp, fits Chevrolet 8110 1
MSD Ignition coil Blaster SS coil 8207 1
MSD Spark-plug wire set Universal, eight-cylinder, straight spark-plug boots, red 31199 1
Professional Products Harmonic damper PowerForce+Plus, 8.0-od, internal-balance, meets SFI 18.1 90004 1
Scat Connecting rods Pro Comp forged, I-beam type, 6.385 center-to-center, bushed 2-ICR6385-7/16 8
Scat Crankshaft Pro Comp forged, 4.25 stroke, for 6.385 center-to-center rods 4-454-4250-6385-2 1
540 Big Block Chevy Engine - Godzilla Rat
Fel-Pro Oil pan gasket set Molded rubber, one-piece w/rigid carrier, 0.094 thick 1884R 1
Fel-Pro R.A.C.E. gasket set Miscellaneous gaskets for ’65-’90 Mark IV engines 2703 1
Fel-Pro Rear main-seal set Premium Fluoroelastomer, two-piece, high-vacuum 2918 1
Fel-Pro Valve-cover gasket set Silicone molded-rubber w/steel core, 0.137 thick 1635 2
Fel-Pro Water outlet gasket Chevrolet V-8, 1/8-thick plastic/molded rubber 2202 1
GM Adapter Chevrolet V-8 oil filter adapter (supplied by Burt Chevrolet) 3952301 1
GM O-ring Rear main cap oil transfer hole seal, Gen V-VI big-block 6264902 1
Hooker Exhaust header set Super Comp, 2 x 35 primaries, 3½ x 10 collectors, ’70-’72 Camaro 2217-1HKR 1
JE/Sportsman Piston rings Premium plasma-moly 1/1 6 x 1/16 x 3/16 w/ oil-ring retainer, file-fit J100F8-4500-5 1 set
JE/Sportsman Piston set Small dome profile, 4.50 bore, includes pins and retainers 212161 1 set
Lunati Cam button ’65-’96 Chevrolet 396-454 9000 1
Lunati Cam lock plate ’55-’96 Chevrolet V-8 90283 1
Lunati Retainer 10 degree for 5/16, 11/32, or 3/8 valve stem 75513 1 set
Lunati Rocker arm Aluminum full-roller, 7/16-stud, 1.70:1 ratio 85350LUN 1 set
Lunati Timing set Full roller, nine-keyway, with 0.250-thick Torrington bearing 93116 1
Lunati Valvesprings Intro series, dual w/damper, 377 lb/in load 73121 1 set
Manley Valve lock 10-degree for 3/8-stem valves 13195-16 1 set
Milodon Dipstick Flexible, Chevy big V-8 22010 1
http://www.hotrod.com/techarticles/engi ... to_25.html
40 Big Block Chevy Engine - Godzilla Rat
Blueprint Data
Except as noted, all dimensions are in linear inches. For cam specs, see the separate Camshaft table.
Engine type: Chevrolet Mark IV big V-8
Engine builder: Speed-O-Motive
Measures And Volumes
Advertised displacement: 540 ci
Actual displacement: 540.7 ci
Bore x stroke: 4.50 x 4.25
Compression ratio (GM 049 heads): 9.90:1
Compression ratio (Brodix heads): 10.93:1
Main bearing clearance: 0.0025
Crankshaft thrust clearance: 0.0065
Rod bearing clearance: 0.0022
Rod side clearance: 0.018
Rod center to center: 6.385
Rod/stroke ratio: 1.50:1
Crank centerline to deck: 9.7805
Piston-to-bore clearance: 0.006
Piston compression distance: 1.270
Piston deck height: 0.005 below
Piston dome volume: 10 cc
Head gasket compressed volume: 11.2 cc
Chamber volume (GM 049 heads): 122 cc
Chamber volume (Brodix heads): 109 cc
Piston ring gap, 1st groove: 0.020
Piston ring gap, 2nd groove: 0.022
Piston ring gap, oil groove support rail: 0.015 minimum
Camshaft thrust clearance: 0 (Torrington bearing installed behind cam sprocket)
Piston-to-valve clearance: 0.100-plus
Valvespring seat pressure (Lunati PN 73121): 142 lbs @ 1.940
Valvespring open pressure: 402 lbs @ 1.250
Valvespring coil-bind: 1.130
Critical Tightening Values
Values not listed are the same as production.
With ARP assembly lube:
ARP capscrews in Scat rods: 70 lb-ft
ARP damper bolt: 80 lb-ft
ARP head bolts: 70 lb-ft
Dart main bolts: 105 lb-ft With SAE 30 engine oil
ARP oil pump stud: 65 lb-ft
Rocker studs: 60 lb-ft
Chevy Engine - Godzilla Rat»big block chevy parts specifications
540 Big Block Chevy Engine - Godzilla Rat
APPLICATION-SPECIFIC PARTS: GM OVAL-PORT HEADS
Fel-Pro Header gasket set 1.88x1.88 square ports 1410 1
Fel-Pro Intake gasket set Embossed, steel-core laminate, oval-port, 1.82 x 2.05 x 0.060, no heat 1210 1
GM Cylinder head Iron, 2.06/1.72 valves (used, supplied by Cylinder Head Exchange) Cast 353049 2
Lunati Valve seal For 3/8-stem valves and 0.530-od guides 78385 1 set
Manley Exhaust valve Pro Flow, 1.72 head, 3/8 stem 11517-8 1 set
Manley Intake Valve Race Flow, 2.065 head, 3/8 stem 11514-8 1 set
APPLICATION-SPECIFIC PARTS: BRODIX OVAL-PORT HEADS
Brodix Cylinder head Race-Rite, oval-port, 270cc intake, 115cc chamber 2060004 2
Fel-Pro Header gasket set 1.94 round ports 1411 1
Fel-Pro Intake gasket set Composite w/Printoseal, oval-port, 1.82 x 2.05 x 0.060, w/heat 1212 1
APPLICATION-SPECIFIC PARTS: LUNATI HYDRAULIC FLAT-TAPPET CAM
Edelbrock Intake manifold Performer 2-O, no EGR 2161 1
Holley Carburetor 4150 HP, 750-cfm, mechanical secondaries, gasoline 0-80528-1 1
Lunati Camshaft Hydraulic flat-tappet, Voodoo-series, ’65-’96 Chevrolet big V-8 60204 1
Lunati Lifter Hydraulic flat-tappet Micro-Trol, 0.842-od, ’55-’96 Chevrolet V-8 71817 1 set
Lunati Lubricant Assembly lubricant, 10-gram tube 99010 1
Lunati Pushrods Bracket Master II series, 3/8-inch od 80144 1 set
APPLICATION-SPECIFIC PARTS: LUNATI HYDRAULIC ROLLER CAM
Edelbrock Intake manifold RPM Air-Gap 2-O 7561 1
Holley Carburetor 4150 HP Ultra, 950-cfm, mechanical secondaries, gasoline 0-80676 1
Lunati Camshaft Hydraulic roller, Voodoo Retrofit, '65-'96 Chevrolet big V-8 60212 1
Lunati Lifter Hydraulic roller retrofit, 0.842-od, big-block Chevy 72431LUN 1 set
Lunati Pushrods Bracket Master II series, 3/8-inch od 80160 1
ock Chevy Engine - Godzilla Rat»big block chevy engine milodon oil pump
540 Big Block Chevy Engine - Godzilla Rat
Milodon Driveshaft Oil pump, Chevy big V-8 23060 1
Milodon Installation kit Extended main studs and nuts for supporting windage tray 81151 1
Milodon Oil pan Low-profile, ’65-’90 Mark IV, 7-quart, 8.5 deep sump, notched rails 30950 1
Milodon Outlet Engine coolant outlet, GM, early-style 65715 1
Milodon Pickup/inlet screen Extreme duty, Chevy big V-8 18201 1
Milodon Rear oil pan baffle Chevy big-V-8 32505 1
Milodon Valve covers Chevy Mark IV, tall-style, chrome 85600 1
Milodon Windage tray Diamond-Stripper design 32260 1
MSD Distributor Pro-Billet, Chevrolet V-8 85551 1
MSD Distributor clamp Billet hold-down clamp, fits Chevrolet 8110 1
MSD Ignition coil Blaster SS coil 8207 1
MSD Spark-plug wire set Universal, eight-cylinder, straight spark-plug boots, red 31199 1
Professional Products Harmonic damper PowerForce+Plus, 8.0-od, internal-balance, meets SFI 18.1 90004 1
Scat Connecting rods Pro Comp forged, I-beam type, 6.385 center-to-center, bushed 2-ICR6385-7/16 8
Scat Crankshaft Pro Comp forged, 4.25 stroke, for 6.385 center-to-center rods 4-454-4250-6385-2 1
540 Big Block Chevy Engine - Godzilla Rat
Fel-Pro Oil pan gasket set Molded rubber, one-piece w/rigid carrier, 0.094 thick 1884R 1
Fel-Pro R.A.C.E. gasket set Miscellaneous gaskets for ’65-’90 Mark IV engines 2703 1
Fel-Pro Rear main-seal set Premium Fluoroelastomer, two-piece, high-vacuum 2918 1
Fel-Pro Valve-cover gasket set Silicone molded-rubber w/steel core, 0.137 thick 1635 2
Fel-Pro Water outlet gasket Chevrolet V-8, 1/8-thick plastic/molded rubber 2202 1
GM Adapter Chevrolet V-8 oil filter adapter (supplied by Burt Chevrolet) 3952301 1
GM O-ring Rear main cap oil transfer hole seal, Gen V-VI big-block 6264902 1
Hooker Exhaust header set Super Comp, 2 x 35 primaries, 3½ x 10 collectors, ’70-’72 Camaro 2217-1HKR 1
JE/Sportsman Piston rings Premium plasma-moly 1/1 6 x 1/16 x 3/16 w/ oil-ring retainer, file-fit J100F8-4500-5 1 set
JE/Sportsman Piston set Small dome profile, 4.50 bore, includes pins and retainers 212161 1 set
Lunati Cam button ’65-’96 Chevrolet 396-454 9000 1
Lunati Cam lock plate ’55-’96 Chevrolet V-8 90283 1
Lunati Retainer 10 degree for 5/16, 11/32, or 3/8 valve stem 75513 1 set
Lunati Rocker arm Aluminum full-roller, 7/16-stud, 1.70:1 ratio 85350LUN 1 set
Lunati Timing set Full roller, nine-keyway, with 0.250-thick Torrington bearing 93116 1
Lunati Valvesprings Intro series, dual w/damper, 377 lb/in load 73121 1 set
Manley Valve lock 10-degree for 3/8-stem valves 13195-16 1 set
Milodon Dipstick Flexible, Chevy big V-8 22010 1