4340 Forged Steel Crankshafts
F43 Series 4340 Forged Steel Crankshafts
&UDQNVDUHQLWULGHKDUGHQHGDQGVWUDLJKWHQHGZLWKODUJH¿OOHW radius on all journals for increased lubrication. All rod journals have lightening holes. Each crank has straight shot, back-drilled RLOLQJIRUPD[LPXPHI¿FLHQF\$YDLODEOHLQVWDQGDUGOLJKWZHLJKW and superlight models. Lightweight cranks are knife-edged and SUR¿OHGIRUZHLJKWUHGXFWLRQ6XSHUOLJKWFUDQNVIHDWXUHSHQGX - lum undercut counterweights for additional weight reduction. All cranks are micropolished and inspected.
Forged 4340 steel crankshafts are exceptionally light (just OEV ZLWKSHQGXOXPFXWDQGSUR¿OHGFRXQWHUZHLJKWVDQG gun-drilled main line holes. Crankshafts are nitride hardened for increased wear resistance. Straight shot, chamfered oil holes improve lubrication. SB Chevy 350 SCA4-350-3480-5700-18LW Honda Journal, 2-Pc. Rear Seal 3.480" 5.700" 1.888" SCA4-350-3480-5700-20LW Sm. Journal, 2-Pc. Rear Seal 3.480" 5.700" 2.000" SCA4-350-3480-5700-21LW Large Journal, 2-Pc. Rear Seal 3.480" 5.700" 2.100" SCA4-350-3500-5700-18LW Honda Journal, 2-Pc. Rear Seal 3.500" 5.700" 1.888" SCA4-350-3500-5700-21LW Large Journal, 2-Pc. Rear Seal 3.500" 5.700" 2.100" SCA4-350-3750-6000-21LW Large Journal, 2-Pc. Rear Seal 3.750" 6.000" 2.100" SB Chevy 400 SCA4-400-4000-6000-21LW Large Journal, 2-Pc. Rear Seal 4.000" 6.000" 2.100" Series 9000 Cast Pro Comp Crankshafts Part No. Description Stroke Rod Length Rod Journal Crankshafts for mild racing applications have Aero-wing FRXQWHUZHLJKWVIXOO\FKDPIHUHGRLOKROHV¿OOHWUDGLXVRQDOO journals, shot-peened surfaces for increased strength, knife- edged counterweights, lightening holes in all rod throws, and a IXOOURXQGUHDUÀDQJH$OVRDYDLODEOHLQOLJKWZHLJKWYHUVLRQV Part No. Description Stroke Rod Length Rod Journal SB Chevy 350 SCA9-350-3480-5700 Pro Comp 3.480" 5.700" 2.100" SCA9-350-3750-5700 Pro Comp 3.750" 5.700" 2.100" SCA9-350-3750-5700-L † Pro Comp 3.750" 5.700" 2.100" SCA9-350-3750-6000 Pro Comp 3.750" 6.000" 2.100" SB Chevy 400 SCA9-400-3500-6000 Pro Comp 3.500" 6.000" 2.100" SCA9-400-3750-5700 Pro Comp 3.750" 5.700" 2.100" SCA9-400-3750-6000 Pro Comp 3.750" 6.000" 2.100" SB Ford 302 SCA9-302-3400-5400-2123* Pro Comp 3.400" 5.400" 2.123" SB Ford 351W SCA9-351-385-5955-2311W* Pro Comp 3.850" 5.955" 2.311" † 1-piece rear main seal. * Use 28-oz. balancer.
Rod Length Rod Journal
Part No.
Description
Stroke
SB Chevy 350
SCA4-350-3480-5700
Standard 3.480" 5.700" 2.100"
SCA4-350-3500-5700-2 Lightweight SCA4-350-3562-5700-3-20* Superlight
3.500" 5.700" 2.100" 3.562" 5.700" 2.000"
SCA4-350-3750-5700 SCA4-350-3750-5700-L † SCA4-350-3750-6000 SCA4-350-3750-6000-3 SCA4-350-3875-6000
Standard 3.750" 5.700" 2.100" Standard 3.750" 5.700" 2.100" Standard 3.750" 6.000" 2.100"
SCA4-350-3750-6000-2 Lightweight
3.750" 6.000" 2.100" 3.750" 6.000" 2.100"
Superlight
Standard 3.875" 6.000" 2.100"
SCA4-350-3875-6000-2 Lightweight
3.875" 6.000" 2.100"
SCA4-350-4000-6000
Standard 4.000" 6.000" 2.100"
SB Chevy 400
SCA4-400-3500-6000 SCA4-400-3750-5700 SCA4-400-3750-6000 SCA4-400-3750-6000-3 SCA4-400-3875-6000
Standard 3.500" 6.000" 2.100" Standard 3.750" 5.700" 2.100" Standard 3.750" 6.000" 2.100"
Superlight
3.750" 6.000" 2.100"
Standard 3.875" 6.000" 2.100"
SB Ford 302 SCA4-302-3000-5090-2123 Standard 3.000" 5.090" 2.123" SCA4-302-3250-5400-2123 Standard 3.250" 5.400" 2.123" SCA4-302-3400-5400-2123 Standard 3.400" 5.400" 2.123" SCA4-302-3400-54-2123-I ‡ Lightweight 3.400" 5.400" 2.123" Ford 351C SCA4-351C-3500-6000 Standard 3.500” 6.000” 2.100” * Small rod journal 2.000" crankshaft. † 1-piece rear main seal. ‡ Internally balanced. 4340 Forged Stock Replacement I-Beam Connecting Rods Scat forged 4340 I-beam connecting rods are
SUR¿OHGIRUDGGHGFOHDUDQFHDQGZHLJKWUHGXFWLRQ $YDLODEOHLQSUHVV¿WDQGEXVKHGYHUVLRQV5RGV are sold in balanced sets of eight. Part No. Description Length Journal Pin SB Chevy SCA3-ICR5700 Bushed 5.700" 2.100" .927" SCA3-ICR5700P Press-Fit 5.700" 2.100" .927" SCA3-ICR6000 Bushed 6.000" 2.100" .927" Replacement/Related Components Part No. Description
SCA4AJ1.601-1SLU ARP 8740 Rod Bolt, 3/8" x 1.600", 12-Point Head SCA4AJ1.601-2SLU ARP 2000 Rod Bolt, 3/8" x 1.600", 12-Point Head SCAB927 Wrist Pin Bushing, SBC/SBF, 0.927" Diameter SCA4AP1.400-1LU ARP 8740 Rod Bolt, 7/16"x 1.400", 12-Point Head SCA4AP1.450-2LU ARP 2000 Rod Bolt, 7/16" x 1.450", 12-Point Head SCA4AP1.602-2LU ARP 2000 Rod Bolt, 7/16" x 1.602", 12-Point Head
CARLOS PIZZARO
MARCUS BERGLUND
700
CIRCLE TRACK 2021-22
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