Interresting teardown
#11
Registered
First, what Edelbrock was that? I love their Carbs on boats. Boats are a different world then street motors and they are built tough and simple and easy to fix a rich or lean.
Second, an alpha drive you don't want anything stupid. Alphas behind BB's were a big mistake for Mercruiser even for their 330 BBC and is the reason the Bravo came out.
Third, what comes around goes around. Eagle's name has gone to $hit over the years and Scat has become more desired. Figure that out.
Forth, this is what I did 6 years ago an I run the piss out of it in a heavy 19' Nova.
1980-90, 14015445 (7.4) 454 - 4 Bolt Main Big Block
Dipped And Honed The Decks And Cylinders Cut .060 Over
Block Was Detailed With All Casting Debris Removed
Scat 9000 Crank 4.25, 496 Stroker - cut .020 under
Scat 26385716 - 6.385 in. Connecting Rods - Floating Pins -I Beam Forged 4340 steel
Howards Cams 120255-12 - Max Torque Retrofit Hydraulic Roller Camshafts, Hydraulic Roller Tappet, Advertised Duration 288/294, Lift .585/.610, 112 L/S
Howards Valve Springs 98636 (recomended) - 130# / 330#
Comp 780-16 Spring Retainers
Cloyes Gear 9-203 - Cloyes Wear Plate, .031 in. Thick
CCA-205 Cam Button
Maxspeeding Hydraulic Retrofit Roller Lifters
Probe 496 Dome Top +18.0cc, .060 - SRS - PHV Series Piston Set
Cloyes True Double Roller Timing Chain
Mahle - 4.310 Plasma Moly Coated Piston Rings
Melling 10778C (Anti-Cavitation) Oil Pump
Melling HV Oil Pump Shaft
New Solid Harmonic Balancer
Rotating Assembly Fully Balanced
Trick Flow Chromoly Pushrods TFS-21417800-8
Heads 6272990 / Date Codes 1/25/81 and 1/29/81 / Open / 118cc / 3 Angle Valve / porting services - Mullen Race Engine Cylinder Heads, Carson, Calif
Summit Racing / SUM-V8030-8 Stainless Steel Valves 1.880 in.
Summit Racing / SUM-V8022-8 Stainless Steel Valves 2.190 in.
Chevrolet Performance Head Bolt Kits 12367779
ARP 1.90 Rocker Studs
Norris S/S 1.7 Roller Rockers
EDELBROCK BBC R2 AIRGAP INTAKE
Pro Comp 2752 Fuel Pump
MSD Ignition
Pro Comp Distributor
Super Stock Coil
8mm Accel Hi Performance Wires
New Single Wire Alternator
Mini (gear reduction and fully marine) 3HP Starter
Edelbrock 800 Carburetor
12" Aluminum, Oval Air Cleaner With K&N Filter
Brass Freeze Plugs
Stainless Steel Bolt Set
4" Stainless Steel "Tall" Risers
496 MerCruiser Exhaust Manifolds
Sherwood Motor Mounted Raw Water Pump
-------------------------------------
Clevite 77 Cam Bearings
Federal-Mogal 4400 M20 Main Bearings
King Engine Rod Bearings CR 808 HPN 020
---------------------------------------
Edelbrock 7202 Intakes Gasket Set
Trick Flow Gasket Set
Fel Pro Q2904 Rear Main Seal
Fel Pro 1804 Oil pan gasket
Fel-17040 Head Gaskets
Second, an alpha drive you don't want anything stupid. Alphas behind BB's were a big mistake for Mercruiser even for their 330 BBC and is the reason the Bravo came out.
Third, what comes around goes around. Eagle's name has gone to $hit over the years and Scat has become more desired. Figure that out.
Forth, this is what I did 6 years ago an I run the piss out of it in a heavy 19' Nova.
1980-90, 14015445 (7.4) 454 - 4 Bolt Main Big Block
Dipped And Honed The Decks And Cylinders Cut .060 Over
Block Was Detailed With All Casting Debris Removed
Scat 9000 Crank 4.25, 496 Stroker - cut .020 under
Scat 26385716 - 6.385 in. Connecting Rods - Floating Pins -I Beam Forged 4340 steel
Howards Cams 120255-12 - Max Torque Retrofit Hydraulic Roller Camshafts, Hydraulic Roller Tappet, Advertised Duration 288/294, Lift .585/.610, 112 L/S
Howards Valve Springs 98636 (recomended) - 130# / 330#
Comp 780-16 Spring Retainers
Cloyes Gear 9-203 - Cloyes Wear Plate, .031 in. Thick
CCA-205 Cam Button
Maxspeeding Hydraulic Retrofit Roller Lifters
Probe 496 Dome Top +18.0cc, .060 - SRS - PHV Series Piston Set
Cloyes True Double Roller Timing Chain
Mahle - 4.310 Plasma Moly Coated Piston Rings
Melling 10778C (Anti-Cavitation) Oil Pump
Melling HV Oil Pump Shaft
New Solid Harmonic Balancer
Rotating Assembly Fully Balanced
Trick Flow Chromoly Pushrods TFS-21417800-8
Heads 6272990 / Date Codes 1/25/81 and 1/29/81 / Open / 118cc / 3 Angle Valve / porting services - Mullen Race Engine Cylinder Heads, Carson, Calif
Summit Racing / SUM-V8030-8 Stainless Steel Valves 1.880 in.
Summit Racing / SUM-V8022-8 Stainless Steel Valves 2.190 in.
Chevrolet Performance Head Bolt Kits 12367779
ARP 1.90 Rocker Studs
Norris S/S 1.7 Roller Rockers
EDELBROCK BBC R2 AIRGAP INTAKE
Pro Comp 2752 Fuel Pump
MSD Ignition
Pro Comp Distributor
Super Stock Coil
8mm Accel Hi Performance Wires
New Single Wire Alternator
Mini (gear reduction and fully marine) 3HP Starter
Edelbrock 800 Carburetor
12" Aluminum, Oval Air Cleaner With K&N Filter
Brass Freeze Plugs
Stainless Steel Bolt Set
4" Stainless Steel "Tall" Risers
496 MerCruiser Exhaust Manifolds
Sherwood Motor Mounted Raw Water Pump
-------------------------------------
Clevite 77 Cam Bearings
Federal-Mogal 4400 M20 Main Bearings
King Engine Rod Bearings CR 808 HPN 020
---------------------------------------
Edelbrock 7202 Intakes Gasket Set
Trick Flow Gasket Set
Fel Pro Q2904 Rear Main Seal
Fel Pro 1804 Oil pan gasket
Fel-17040 Head Gaskets
#12
Registered
well not sure on how much power you are looking to make, But I have run several non forged setups, beat the hell out of them, never had a issue due to them, at power level 90% of marine engines are, put in a set of ARP rod bolts, make sure rods are round, crank good, set bearing clearances and roll on..buts thats me..
#13
Registered
iTrader: (2)
Sounds like someone was trying to go for the gusto with a peanut motor.
A forged mag crank 7/16 rods and a set of trw minidome ls6 replacement pistons should all balance properly and still give you the right compression if you have 118cc or so chambers.
May have to buy a new flywheel.
Odds are , it will offer less vibration at mid rpm than before also....
A forged mag crank 7/16 rods and a set of trw minidome ls6 replacement pistons should all balance properly and still give you the right compression if you have 118cc or so chambers.
May have to buy a new flywheel.
Odds are , it will offer less vibration at mid rpm than before also....