CAMSVALVE TRAINRODSPISTONSSTROKER KITSCRANKSGASKETS |
|
|
POLARIS PRO R CRANKSHAFTS
BC crankshafts are made from the finest, aerospace grade 4340 steel billet material, 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. Use with OEM reluctor wheel. |
 |
 |
|
Part # |
|
Description # |
|
Stroke |
|
Crank Pin |
|
Main |
|
Buy Now |
|
Status |
|
|
| BC5916 |
CRANKSHAFT - Polaris Pro R (Stock Stroke - 34 lbs), 4340 Billet, OEM replacement. |
73.5mm |
45.00mm |
52.00mm |
 |
In-Stock |
|
| BC5917 |
CRANKSHAFT - Polaris Pro R (+4.5mm Stroke 34 lbs), 4340 Billet, requires custom pistons. |
78mm |
45.00mm |
52.00mm |
|
In-Stock |
|
| BC5917LW |
CRANKSHAFT - LightWeight Polaris Pro R (+4.5mm Stroke - 29 lbs), 4340 Billet, requires custom pistons. |
78mm |
45.00mm |
52.00mm |
|
In-Stock |
|
| BC5918 |
CRANKSHAFT - Polaris Pro R (short stroke for 1000cc to 1200cc rule classes), 4340 Billet |
41.40mm |
|
52.00mm |
|
In-Stock |
|
|
|
POLARIS PRO R RACE SERIES PERFORMANCE ROD BEARINGS.
New ACL rod bearings for the Polaris Pro R and SlingShot engine are available exclusively through BC. ACL Race Series performance engine bearings are manufactured to exacting tolerances. Micron tolerance machining supported by precision measurement systems delivers consistent accuracy to key characteristics like wall thickness and crush. A blend of characteristics to provide high strength and excellent seizure resistance with no flash plating applied to further improve bearing retention and maximise heat transfer. Improved bearing retention from higher radial contact pressure with more effective heat dissipation through improved thermal transfer. Bearing Eccentricity Definition: Gradual reduction in wall thickness between the crown and parting line. ACL Race Series performance engine bearings feature increased eccentricity to improve shape adaptation to compensate for bore distortion at high speed operation. Assists in the formation of hydrodynamic oil film.
- Superior seizure resistance
- Superior cavitation resistance
- Superior wear resistance
- Superior protection against oil starvation
|
 |
|
|
Part # |
|
Description # |
|
Sizes |
|
Buy Now |
|
Status |
|
|
| BC4901-2 |
ROD BEARINGS - ACL Race Series, Coated Bearings - Midnight Blue OEM Replacement (set/4) |
Standard |
|
In-Stock |
|
| BC4901HX-2 |
ROD BEARINGS - ACL Race Series, Coated Bearings - White OEM Replacement w/extra .001" extra oil clearance (set/4) |
+.001" |
|
In-Stock |
|
|
|
619.749.9018 ph
619.749.9128 fx
|
| 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.. |
|
|
 |
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 |
|
 |
|
|
|
