BRIAN CROWER Pro625+ Big Bore Stroker Kit, BMW M50 M52, Custom Pistons

Description

BRIAN CROWER Pro625+ Big Bore Stroker Kit, BMW M50 M52, Custom Pistons

The BC stroker kit for the BMW engine platform Incorporates a 95.6mm, steel billet crank, BC 4340 Pro Series connecting rods rated to 1600+ horsepower (with ARP CA625+ rod bolts). Depending on bore size that you decide, the BC kit will take you up to a 3.4L with 87mm bore. As usual, each BC kit features custom CP aluminium forged pistons, 9310 alloy wrist pins and complete ring pack. Built for high horsepower and torque.
Due to the vast range of customisation options, all stroker kits are manufacturerd to order. Lead-times are usually fairly quick, but we will need to know your piston size and compression ratio.

Overview

• Description: Big Bore Stroker Kit, BMW M50 M52, Custom Pistons
• Connecting Rods: Pro625+ (rated to 280,000 psi)
• Part Number: BC0788
• Supplier: Brian Crower
• Spec: 3.40L – Includes 4340 billet LightWeight crank, 95.6mm stroke, BC Pro625+ rods (5.315 c-to-c), and custom pistons (choice of bore/compression)
• Comparison: M50 84mm Bore x 75mm Stroke / M52 84mm Bore x 84mm Stroke

Features

• BC 4340 billet steel crankshaft (95.6mm stroke).
• BC 4340 Pro Series connecting rods
• CP aluminium forged pistons (any bore size, any compression ratio).
• 9310 Series upgraded wrist pins standard.
• Ductile iron plasma top rings, tapered second ring, low tension oil rings.
• Fully system balanced and ready to install.
• 3.40L – Includes 4340 billet LightWeight crank, 95.6mm stroke, BC Pro625+ rods (5.315 c-to-c), and custom pistons (choice of bore/compression).

Components

Crankshafts

BC M50 / M52 / S52 crankshafts are made from the finest, aerospace grade EN30B 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.

Connecting Rods

BC connecting rods are CNC machined from aerospace grade 4340 steel billet, available in your choice of the European influenced H beam or the traditional I beam design (certain applications). All rods feature a deep, double ribbed cap that keeps the big end housing bore true at extended rpm and insures uniform bearing crush, delivering proper clearances for superior oil supply and maximum load carrying capacity. H Beam rods feature a deep radial groove pin bushing and oil holes at 5 and 7 o’clock (the beam acts as a trough), bringing critical lubrication to the critical wrist pin area. I Beam rods feature a oil hole at the 12 o’clock position that keep the pin end bore true at high boost. Available in your choice of ARP2000 fasteners (rated to 210,000 psi) or the ultimate faster, ARP’s Custom Age 625+ (rated to 280,000 psi).

Pistons

Choose from the top piston brands available… CP or JE… in any desired bore size and compression ratio. Both brands make their custom BC stroker pistons from 2618 T6 high tensile strength forged aluminum forgings. These forgings are computer designed for strength and minimum weight. Each piston dia is CNC machined to assure optimal accuracy and superior grain flow in the forging process. 3D modeling software and rigorous Finite Element Analysis insure that your pistons are manufactured to the strongest and lightest part possible for your application. Your custom pistons feature tighter clearances, less noise, better ring seal and overall better durability. Standard features include pin fit, carbon steel wrist pins and spiral locks or rail supports depending on application. Added features include upgraded 9310 alloy wrist pins for reduced flex, lateral gas ports to assist in ring seal, skirt and top coatings and lightweight design.

Brian Crower

Brian Crower, Inc. was created to fill the need for high quality, high performance, late model internal engine components, in stock, at very affordable prices. Stroker kits for all popular Sport Compact applications and camshafts and valve train to match. Complete packages designed to work together to deliver more horsepower and torque as well as greater reliability. Their state-of-the-art precision machining processes, along with extensive industry knowledge spanning generations, has evolved to produce the highest quality internal engine components which are trusted and used by many top-tier racing teams today.