We have a large assortment of BBC crankshaft models to choose from. We have stock stroke and several different BBC stroker crank lengths available for these popular V8 engines. We have BBC crank models in both 6 counterweight and 8 counterweight styles. Molnar Technologies superior big block Chevy crankshafts are extremely strong, precision machined high performance parts and can be used in everything from a high performance street car to an all out competition vehicle.
Check out the many premium features included with each Molnar big block Chevy crankshaft and order today to get started on your next engine project. Check out our selection of Molnar connecting rods also and get a set of rods that will be the perfect match for your new crankshaft.
Molnar Big Block Chevy Crankshaft Features
- 4340 forged premium steel construction
- Nitrided main and rod journal surfaces for superior wear resistance
- Multi stage heat treatment
- Precision machined to extremely tight tolerances
- Material properties are monitored closely to insure optimum performance
- Counterweight placement designed for improved crankshaft performance
- .125" radius on both the connecting rod and main journals for increased strength
- Precision ground and micro-polished journals
- Chamfered oil holes for improved oiling
- Indexed for correct stroke
4340 Forged Steel Big Block Chevy Crankshaft Specs
- Stroke Crankshaft stroke length
- Notes Additional information about specific applications
- Pin Crank rod pin / rod journal diameter
- Main Main journal size
- Min Rod Recommended minimum rod length
- Bob Approximate bob weight
Molnar Technologies BBC Crankshaft Specs |
||||||
| Part # and Price | Stroke | Notes | Pin | Main | Min Rod |
Bob |
|---|---|---|---|---|---|---|
| 454-4000DC6F-6135
|
4.000 | 4.000" Stroke 6 counterweight | 2.200 | 454 | 6.135 | 2200 |
| 454-4000DC6F-OPS-6135
|
4.000 | 4.000" Stroke 6 counterweight, one piece rear seal | 2.200 | 454 | 6.135 | 2200 |
| 454-4250DC6F-6135
|
4.250 | 4.250" Stroke 6 counterweight | 2.200 | 454 | 6.135 | 2200 |
| 454-4250DC6F-6385
|
4.250 | 4.250" Stroke 6 counterweight | 2.200 | 454 | 6.385 | 2200 |
| 454-4250DC6F-OPS-6385
|
4.250 | 4.250" Stroke 6 counterweight, 1 piece rear seal | 2.200 | 454 | 6.385 | 2300 |
| 454-4250DC8F-6385
|
4.250 | 4.250" Stroke 8 counterweight | 2.200 | 454 | 6.385 | 2300 |
| 454-4375DC8F-6385
|
4.375 | 4.375" Stroke 8 counterweight | 2.200 | 454 | 6.385 | 2300 |
|
454-4375DC8F-OPS-6385
|
4.375 | 4.375" Stroke 8 counterweight, One piece seal | 2.200 | 454 | 6.385 | 2150 |
| 454-4500DC8F-6535
|
4.500 | 4.500" Stroke 8 counterweight | 2.200 | 454 | 6.535 | 2300 |
|
454-4750DC8F-660
|
4.750 |
4.750" Stroke 8 counterweight 6.600 minimum rod length |
2.200 | 454 | 6.600 | 2250 |
| 454-4750DC8F-670
|
4.750 |
4.750" Stroke 8 counterweight 6.700 minimum rod length |
2.200 | 454 | 6.700 | 2300 |
If you do not find the big block Chevy crankshaft you need, please contact us for assistance. New models are constantly in development so we may have cranks available that have not been added to this site you.