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SB CHEVROLET 4340 forged CRANKSHAFTS (47-51 lbs)
BC crankshafts are available in 4340 steel forgings up to 1800whp. CNC machined on state of the art, 5 axis Mazak Integrex 300-IV CNC machines to exacting tolerances (.0001"). Every crankshaft features large radius journals that add rigidity for high horsepower, high boost, high rpm applications. Gun drilled, CNC ground oil holes feature a smooth surface for extra oiling, tear dropped for added oil scoop, cross drilled for priority main feeding to the rods and micro polished to a mirror finish for optimum bearing lubricity. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. BC also offers a Micro Polish finish that not only increases oil shedding, while decreasing oil foaming and parasitic losses but this polishing process enhances the ion nitriding, increasing overall tensile strength by 10% over the standard BC crankshafts. |
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Part # |
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Description # |
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Stroke |
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Crank Pin |
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Main |
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Buy Now |
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Status |
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| BC5443-3750-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.750" |
2.100" |
350 (2.448") |
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In-Stock |
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| BC5443-3750-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.750" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC5444-3750-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.750" |
2.100" |
400 (2.650") |
|
In-Stock |
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| BC5444-3750-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.750" |
2.000" |
400 (2.650") |
|
In-Stock |
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| BC5443-3875-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.875" |
2.100" |
350 (2.448") |
|
In-Stock |
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| BC5443-3875-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.875" |
2.000" |
350 (2.448") |
|
In-Stock |
|
| BC5444-3875-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.875" |
2.100" |
400 (2.650") |
|
In-Stock |
|
| BC5444-3875-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.875" |
2.000" |
400 (2.650") |
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In-Stock |
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| BC5443-4000-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
4.000" |
2.100" |
350 (2.448") |
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In-Stock |
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| BC5443-4000-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
4.000" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC5444-4000-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
4.000" |
2.100" |
400 (2.650") |
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In-Stock |
|
| BC5444-4000-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
4.000" |
2.000" |
400 (2.650") |
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In-Stock |
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SB CHEVROLET 4340 billet CRANKSHAFTS (4.500" bore spacing)
BC crankshafts are available in 4340 steel billet for the 4.500" wide bore spacing blocks. Choose from Standard and LightWeight designs, main and rod journal sizes in standard Small Block or Big Block snout/post. |
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Part # |
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Description # |
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Stroke |
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Crank Pin |
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Main |
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Buy Now |
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Status |
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| BC5440B-3750-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs - 4.500" Bore Spacing |
3.750" |
2.000" |
400 (2.650") |
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In-Stock |
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| BC5440B-3875-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs - 4.500" Bore Spacing |
3.875" |
2.000" |
400 (2.650") |
|
In-Stock |
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| BC5440B-4000-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs - 4.500" Bore Spacing |
4.000" |
2.000" |
400 (2.650") |
|
In-Stock |
|
| BC5443B-3750-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs - 4.500" Bore Spacing |
3.750" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC544B3-3875-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs - 4.500" Bore Spacing |
3.875" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC5443B-4000-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs - 4.500" Bore Spacing |
4.000" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC5446B-3750-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs - 4.500" Bore Spacing w/Big Block Snout |
3.750" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC5446B-3875-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs - 4.500" Bore Spacing w/Big Block Snout |
3.875" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC5446BLW-3750-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet LightWeight - 43-46 lbs - 4.500" Bore Spacing w/Big Block Snout |
3.750" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC5446BLW-3875-SJ-4500 |
CRANKSHAFT - Small Block Chevrolet LightWeight - 43-46 lbs - 4.500" Bore Spacing w/Big Block Snout |
3.875" |
2.000" |
350 (2.448") |
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In-Stock |
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SB CHEVROLET 4340 billet CRANKSHAFTS (47-51 LBS)
BC crankshafts are available in 4340 steel billet for applications making over 3000whp. CNC machined on state of the art, 5 axis Mazak Integrex 300-IV CNC machines to exacting tolerances (.0001"). Every crankshaft features large radius journals that add rigidity for high horsepower, high boost, high rpm applications. Gun drilled, CNC ground oil holes feature a smooth surface for extra oiling, tear dropped for added oil scoop, cross drilled for priority main feeding to the rods and micro polished to a mirror finish for optimum bearing lubricity. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. BC also offers a Micro Polish finish that not only increases oil shedding, while decreasing oil foaming and parasitic losses but this polishing process enhances the ion nitriding, increasing overall tensile strength by 10% over the standard BC crankshafts. |
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Part # |
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Description # |
|
Stroke |
|
Crank Pin |
|
Main |
|
Buy Now |
|
Status |
|
|
| BC5443-3750-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.750" |
2.100" |
350 (2.448") |
|
In-Stock |
|
| BC5443-3750-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.750" |
2.000" |
350 (2.448") |
|
In-Stock |
|
| BC5444-3750-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.750" |
2.100" |
400 (2.650") |
|
In-Stock |
|
| BC5444-3750-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.750" |
2.000" |
400 (2.650") |
|
In-Stock |
|
| BC5443-3875-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.875" |
2.100" |
350 (2.448") |
|
In-Stock |
|
| BC5443-3875-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.875" |
2.000" |
350 (2.448") |
|
In-Stock |
|
| BC5444-3875-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.875" |
2.100" |
400 (2.650") |
|
In-Stock |
|
| BC5444-3875-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
3.875" |
2.000" |
400 (2.650") |
|
In-Stock |
|
| BC5443-4000-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
4.000" |
2.100" |
350 (2.448") |
|
In-Stock |
|
| BC5443-4000-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
4.000" |
2.000" |
350 (2.448") |
|
In-Stock |
|
| BC5444-4000-LJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
4.000" |
2.100" |
400 (2.650") |
|
In-Stock |
|
| BC5444-4000-SJ |
CRANKSHAFT - Small Block Chevrolet Standard Weight - 47-51 lbs |
4.000" |
2.000" |
400 (2.650") |
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In-Stock |
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SB CHEVROLET 4340 LIGHTWEIGHT billet CRANKSHAFTS (42-46 LBS)
BC LightWeight crankshafts are available in 4340 steel billet and feature added weight savings with extensive counterweight profiling, gun drilled mains and lightening holes in the rod throws. BC also offers a Micro Polish finish that not only increases oil shedding, while decreasing oil foaming and parasitic losses but this polishing process enhances the ion nitriding, increasing overall tensile strength by 10% over the standard BC crankshafts. |
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Part # |
|
Description # |
|
Stroke |
|
Crank Pin |
|
Main |
|
Buy Now |
|
Status |
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|
| BC5443LW-3750-SJ |
CRANKSHAFT - Small Block Chevrolet LightWeight - 42-46 lbs |
3.750" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC5443LW-3750-HJ |
CRANKSHAFT - Small Block Chevrolet LightWeight - 42-46 lbs - HONDA ROD JOURNAL |
3.750" |
1.888" |
350 (2.448") |
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In-Stock |
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| BC5443LW-3875-SJ |
CRANKSHAFT - Small Block Chevrolet LightWeight - 42-46 lbs |
3.875" |
2.000" |
350 (2.448") |
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In-Stock |
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| BC5443LW-3875-HJ |
CRANKSHAFT - Small Block Chevrolet LightWeight - 42-46 lbs - HONDA ROD JOURNAL |
3.875" |
1.888" |
350 (2.448") |
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In-Stock |
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619.749.9018 ph
619.749.9128 fx
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| Some products listed are not legal for sale or use on emission controlled motor vehicles, RPM ranges vary on application.Warranty Information Copyright © Brian Crower Inc. All rights reserved.. |
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WARNING: This product can expose you to chemicals,
including Chromium (hexavalent compounds), lead and lead
compounds, which are known to the State of California to
cause cancer, birth defects or other reproductive harm. For
more information, visit www.p65warnings.ca.gov |
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