Page 34 - 2021-22_EngineCatalogAP

CRANKSHAFTS
Forged Steel Crankshafts - Cont.
Scat 4340 Pro Series
Standard Weight features 4340 forged steel, heat-treated, nitride hardened, large fillet radii on all journals, lightening holes on rod journals, straight shot & chamfered oil holes, precision ground, and micro-polished. Lightweight has the same fea- tures as standard, with reduced rotating weight design with aero-wing counterweights. Superlight is same as standard but with a pounds-lighter design with aero-wing pendulum undercut counterweights and bridged rod journals. F-43 Lightweight is the same as standard, with gun-drilled main line, aero-wing counterweights, and exclusive pendulum undercut counter- weights.
Part No.
SCA4-350-3250-5700 SCA4-350-3480-5700-18LW SCA4-350-3480-5700-20LW SCA4-350-3480-5700 SCA4-350-3480-5700-21LW SCA7-350-3480-5700 SCA4-350-3500-5700-18LW SCA4-350-3500-5700 SCA4-350-3500-5700-2 SCA4-350-3500-5700-21LW SCA4-350-3562-5700-3-20 SCA4-350-3750-5700 SCA4-350-3750-5700-L SCA4-350-3750-6000 SCA4-350-3750-6000-2 SCA4-350-3750-6000-3 SCA4-400-3750-5700 SCA4-400-3750-6000 SCA4-400-3750-6000-3 SCA7-350-3750-5700 SCA7-350-3750-6000 SCA4-350-3875-6000 SCA4-350-3875-6000-2 SCA4-400-3875-6000 SCA4-400-3875-6000-2 SCA7-350-3875-6000 SCA4-350-3750-6000-21LW SCA4-350-4000-6000 SCA4-350-4000-6000-21LW SCA4-400-4000-6000-21LW SCA7-350-4000-6000 SCA7-400-4000-6000
Description
Standard Weight F-43 Lightweight F-43 Lightweight Standard Weight F-43 Lightweight Excalibur Lightweight F-43 Lightweight Standard Weight Lightweight
F-43 Lightweight Superlight Standard Weight Standard Weight Standard Weight Lightweight Superlight Standard Weight Standard Weight Superlight Excalibur Lightweight Excalibur Lightweight Standard Weight Lightweight Standard Weight Lightweight Excalibur Lightweight F-43 Lightweight Standard Weight F-43 Lightweight F-43 Lightweight Excalibur Lightweight Excalibur Lightweight
Rod Pin Main
2.100" 350 1.888" 350 2.000" 350 2.100" 350 2.100" 350 2.100" 350 1.888" 350 2.100" 350 2.100" 350 2.100" 350 2.000" 350 2.100" 350 2.100" 350 2.100" 350 2.100" 350 2.100" 350 2.100" 400 2.100" 400 2.100" 400 2.100" 350 2.100" 350 2.100" 350 2.100" 350 2.100" 400 2.100" 400 2.100" 350 2.100" 350 2.100" 350 2.100" 350 2.100" 400 2.100" 350 2.100" 400
Main Seal Balance
2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 1-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Ext. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int. 2-Pc. Int.
Bobweight Grams
1820 1750 1750 1820 1750 1750 1750 1820 1750 1750 1750 1820 1820 1820 1750 1750 1820 1820 1750 1750 1750 1820 1820 1820 1820 1750 1750 1820 1750 1750 1750 1750
REAR MAIN SEAL ADAPTERS
Allstar Performance
Convert one-piece rear main seal
on 1986 and
newer small block Chevrolet to old-style, two-piece rear seal
ALL26125
to accept earlier (pre-
1986) crankshaft. Billet aluminum adapters include hardware. Alignment tool allows quick, easy installation.
Chevrolet Performance
Part No.
MOR38315 MOR38415
Description
For New Style (1986-Up)
Oil Pan w/1-Pc. Seal
For Old Style (Pre-1980)
Oil Pan w/Driver's Side Dipstick
Part No.
ALL26125 ALL26126 ALL26127
Description
For Early (Pre-1986) Oil Pan For Late (1987-Up) Oil Pan Alignment Tool
Part No.
GMP14088556
Description
SBC 1-Pc. Seal Housing - Aluminum
32
2021-22 ENGINE BUILDER CATALOG
Min. Rod Stroke Length 3.250" 5.700"
3.480" 5.700" 3.480" 5.700" 3.480" 5.700" 3.480" 5.700" 3.480" 5.700" 3.500" 5.700" 3.500" 5.700" 3.500" 5.700" 3.500" 5.700" 3.562" 5.700" 3.750" 5.700" 3.750" 5.700" 3.750" 5.700" 3.750" 5.700" 3.750" 5.700" 3.750" 5.700" 3.750" 6.000" 3.750" 6.000" 3.750" 5.700" 3.750" 6.000" 3.875" 6.000" 3.875" 6.000" 3.875" 6.000" 3.875" 6.000" 3.875" 6.000" 3.750" 6.000" 4.000" 5.700" 4.000" 6.000" 4.000" 6.000" 4.000" 6.000" 4.000" 6.000"
Rear Target
Approx. Wt./Lbs. 50 40-42 40-42 52-55 40-42 48 40-42 52-55 48-51 40-42 52-55 52 52 52 48-51 44 52 52 44 48 50 52-55 52-55 52-55 52-55 50 40-42 54 40-42 40-42 50 50
CHEVROLET SMALL BLOCK
Canton
Part No.
CAN21-850
Moroso
Description
For Old Style (1986-Up) Oil Pan w/1-Pc. Seal
Billet aluminum adapters convert 1986- up engines with one-piece rear main seal to use old-style, two-piece seal and early crankshaft.