AVAILABILITY: Due to high demand and rigorous quality control standards, current lead time for this machined kit is 1-3 weeks. Orders are processed in the order received.
Key Features and Fixes:
Choate Engineering Performance incorporates critical features to solve common performance constraints and provide a robust foundation for high-horsepower builds.
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Polyphen Coating Tops: The Polyphen Coated Tops act as a thermal barrier to reduce heat transfer into the piston material and oil.
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De-lipped Fuel Bowl: The piston crowns receive a crucial machining modification where the fuel bowl lip is de-lipped. This corrects the fuel spray trajectory to prevent impingement and remove potential hot spots, thereby significantly reducing the risk of piston cracking under high heat and pressure.
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Valve Clearance Solution: The flycut valve reliefs eliminate the common constraint of piston-to-valve interference encountered when using performance cams, allowing builders to confidently select higher lift camshafts.
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Performance Benefits: This heat reduction provides multiple benefits:
- Lower EGTs (Exhaust Gas Temperatures)
- Lower Oil Temps
- Increased HP & Fuel Mileage
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Versatile Use: These pistons are suited for every day use and racing, making them ideal for the daily driver who occasionally tows or the dedicated track competitor.
Components and Parts:
This complete kit provides a ready-to-install solution built for durability under high-stress conditions.
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High-Strength Piston Castings: Built from robust materials capable of withstanding the elevated cylinder pressures and high temperatures common with aggressive tuning and high boost levels.
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Complete Ring Set: Each piston comes with a full set of high-quality standard rings. Designed to meet original specifications, these rings provide dependable sealing and oil consumption control for long-term engine health.
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Wrist Pins and Locks: Includes heavy-duty wrist pins and corresponding locks (or retainers) for secure connection to the connecting rod.
Piston Set Includes:
- 8 Pistons with Ceramic Coated Tops
- Non-coated Piston Skirts
- 8 Pins
- 16 Locks
Machining Process:
The integrity and performance of these pistons are achieved through specialized machining processes focused on geometry, clearance, and quality control.
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Precision Flycutting: The piston crowns are flycut with precision-depth valve reliefs. This guarantees the necessary piston-to-valve clearance required when installing high-lift performance camshafts.
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De-lipped Fuel Bowl: The piston bowl edges are precisely machined (de-lipped) to optimize the fuel spray pattern and help prevent piston cracking by mitigating concentrated hot spots at the bowl lip.
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Piston Geometry: Each piston is machined to specific tolerances and weight-matched to maintain engine balance and ensure consistent performance across all cylinders.
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Piston Cycling: Each piston goes through vigorous quality cycles at our facility to ensure they meet stringent specifications before assembly and coating.
IMPORTANT: There are several piston sizes available. Please be sure that you order the correct size. If you change your piston size after the order has been completed, a restocking and shipping fee may be charged. Standard sized pistons are non-refundable.
