FORD LF NJ4B MZR DURATEC DOHC, ACL Race Series Conrod Bearings (4B4390H)
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FORD LF NJ4B MZR DURATEC DOHC, ACL Race Series Conrod Bearings (4B4390H)
Enhance your engine's performance with the ACL Race Series Conrod Bearings, specifically designed for the FORD LF NJ4B MZR DURATEC DOHC. These bearings are engineered to endure higher RPM conditions, making them ideal for racing and high-performance applications. Suitable for 4, 6, and 8 cylinder engines, they offer superior durability and reliability.
- High strength overlay plate with reduced thickness for improved performance
- Hardened steel backs ensure maximum strength and longevity
- Increased crush and elimination of flash plating for better fit and function
- 3/4 grooving on Main Bearings for optimal oil supply and reduced friction
- Tight, consistent wall tolerances for precision and reliability
- Oversize chamfers where applicable to accommodate various applications
| Product Name | FORD LF NJ4B MZR DURATEC DOHC, ACL Race Series Conrod Bearings (4B4390H) |
|---|---|
| Brands | ACL |
| Engine | 2.0 L Duratec |
| Make | Ford |
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What information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What are the key features of the ACL Race Series Conrod Bearings for the Ford Duratec engine?
The ACL Race Series Conrod Bearings feature a high strength overlay plate with reduced thickness for improved performance, hardened steel backs for maximum strength and longevity, and increased crush to ensure better fit and function. They also have tight, consistent wall tolerances and oversize chamfers where applicable.
Do I need to modify my engine for these conrod bearings?
While the ACL Race Series Conrod Bearings are designed for a direct fit in the Ford LF NJ4B MZR Duratec engine, it's essential to check for proper clearances and ensure that the conrod and crankshaft are machined to the correct specifications. Any variations in the engine's condition may require additional machining.
What RPM range are these conrod bearings suitable for?
These conrod bearings are engineered to endure higher RPM conditions, making them suitable for racing and high-performance applications. However, the reliability at elevated RPMs will depend on proper installation, clearances, and overall engine tuning.
How do I ensure proper lubrication with these conrod bearings?
To ensure proper lubrication, it's crucial to maintain adequate oil supply and pressure. The 3/4 grooving on the main bearings aids in optimal oil flow, but you should also verify that your oil pump and oil system are functioning correctly and that the oil used meets the required specifications for your performance application.
Can these bearings be used in a street application?
While the ACL Race Series Conrod Bearings are primarily designed for racing and high-performance applications, they can be used in street applications if the engine is built to handle higher loads and RPMs. However, consider that their performance characteristics may lead to increased wear in a standard street engine setup.
