Speedmaster®
Ford SB 289 302 Windsor 3.400" 347ci Cast Rotating Assembly Only
Product Information
Overview
Specs
| Brand: | Speedmaster |
| Part Number: | PCE290.2003 |
| Part Type: | Engine Rotating Kit |
| Product Line: | Cast Nodular Iron |
| Actual Engine CID: | 347 |
| Engine Stroke (in): | 3.400 in. |
| Balanced: | No |
| Pistons Included: | Yes |
| Piston Rings Included: | No |
| Piston Oversize (in): | Varies by bore selected |
| Piston Material: | Hypereutectic aluminum |
| Piston Style: | Flat top, with four valve reliefs |
| Piston Head Volume (cc): | -4.00cc |
| Wrist Pin Style: | Floating |
| Piston Ring Facing Material: | Plasma-moly |
| Crankshaft Included: | Yes |
| Crankshaft Material: | Cast steel |
| Rear Main Seal Style: | 1-piece |
| Engine Balance: | 50 oz. External |
| Connecting Rods Included: | Yes |
| Connecting Rod Material: | Forged 4340 steel |
| Connecting Rod Beam Style: | H-beam |
| Rod Bearings Included: | No |
| Rod Bearing Undersize (in): | Stock |
| Main Bearings Included: | No |
| Main Bearing Undersize (in): | Stock |
| Cam Bearings Included: | No |
| Gaskets Included: | No |
| Oil Pump Included: | No |
| Camshaft Included: | No |
| Lifters Included: | No |
| Timing Chain and Gears Included: | No |
| Plastigage Included: | No |
| Assembly Lubricant Included: | No |
| Quantity: | Sold as a kit. |
Description
Crankshaft
These Speedmaster cast crankshafts are perfect for mildly built street engines or just to replace stock crankshafts that have seen better days. These Speedmaster crankshafts are precision-ground and micro-polished to exacting tolerances.
Connecting Rods
These Speedmaster I-beam connecting rods incorporate all of the best features possible for an I-beam rod, including some strength adders found in H-beam designs. Speedmaster I-beam connecting rods are profiled with clearance for long stroke applications. These connecting rods feature a one-rib cap design for added strength and bearing support, polished beams to eliminate stress risers. Speedmaster cap screw bolts to greatly increase strength and horsepower capabilities.
Speedmaster 'I' Beam Street connecting rods are manufactured from high quality 5140 chromoly steel. The rods are x-rayed and ultrasonically tested with all surfaces shot peened and stress relieved.
Pistons
Hypereutectic pistons with anti-friction skirt coating are manufactured from a aluminum alloy which contains 16 percent silicon for greater strength and wear resistance. By combining the hypereutectic alloy with the permanent mold process, the piston is strong, lightweight, and thermally-efficient. These pistons run tighter piston-to-wall clearances, improving ring seal and longevity. They are ideal for street, bracket racers and oval track.
Warranty Information
Prop 65 Warning
Installation Guide
Our AI assistant generates a step-by-step guide for this product — covering installation, maintenance, and troubleshooting.
This AI-generated guide is for general reference only and does not constitute official Speedmaster product documentation. Always verify fitment, torque specifications, and safety requirements before installation.