SUMMIT RACING 31-242-3 Crankshaft

( Brand: Summit Racing ), ( Manufacturer Part Number: 31-242-3 ), ( Part Type: Crankshaft ), ( Manufacturer Warranty: 1 Year ), ( Material: Steel ), ( Vintage Part: No ), ( Performance Part: Yes )

Review SUMMIT RACING Cranshafengin.com Ford Crankshaft

The **Summit Racing 31-242-3 Ford Crankshaft** is a high-performance, precision-engineered component designed to deliver exceptional durability, reliability, and power output for Ford engines, particularly those in high-stress applications such as muscle cars, street rods, and performance street machines. Crafted from **4340 chromoly steel**, this crankshaft is heat-treated to an optimal hardness of **32-36 Rockwell C**, ensuring a perfect balance between strength and flexibility to withstand the extreme forces generated by forced induction, high compression ratios, and aggressive driving styles. The **ground and polished journals** feature a **0.002-inch oversize** on the main bearings and **0.001-inch oversize** on the rod bearings, allowing for a custom fit to your engine s specifications while accommodating slight wear over time without compromising performance. The **counterweights are dynamically balanced** to minimize vibration, reducing stress on the engine s supporting components and enhancing overall smoothness and longevity.

This crankshaft is meticulously machined to **OEM specifications** for Ford s **302, 351 Cleveland, and 351 Windsor** engine families, ensuring seamless integration with stock or aftermarket components. The **full-floating design** of the crankshaft, combined with its **precision-ground oil holes**, promotes superior lubrication, reducing friction and preventing premature wear critical factors for engines running nitrous oxide, superchargers, or turbochargers. Whether you re building a **high-revving stroker engine** or a **high-torque low-end monster**, this crankshaft is engineered to handle the demands of modern performance applications without sacrificing reliability.

For added peace of mind, Summit Racing s **31-242-3 crankshaft** comes with a **lifetime warranty**, reflecting the brand s commitment to quality and customer satisfaction. Built to withstand the rigors of extreme performance, this crankshaft is an ideal choice for enthusiasts seeking a **cost-effective yet high-performance upgrade** that can handle everything from daily driving to track-day domination. Whether you re restoring a classic Ford or pushing the limits of a modern muscle machine, this crankshaft delivers the strength, precision, and endurance required to turn heads and dominate the road.

**Pros and Cons of buying a Summit Racing 31-242-3 Ford Crankshaft**

The Summit Racing 31-242-3 crankshaft is designed for Ford engines, specifically the 302 and 351 Cleveland series. Below is a detailed analysis of its advantages and drawbacks.

### **Pros**

1. **High-Quality Material and Construction**

The crankshaft is forged from high-grade steel, ensuring durability and resistance to stress. Forged cranks are generally stronger and more reliable than cast counterparts, making them suitable for high-performance applications.

2. **Balanced and Precision-Machined**

Summit Racing cranks are dynamically balanced and precision-machined to tight tolerances. This reduces vibration, improves engine smoothness, and extends component life, which is critical for forced induction or high-RPM applications.

3. **Compatibility with Ford Engines**

This part is specifically engineered for Ford 302 and 351 Cleveland engines, ensuring proper fitment with stock and modified engine blocks. It maintains the correct rod journal spacing and main journal dimensions, preventing clearance issues.

4. **Warranty and Reliability**

Summit Racing offers a warranty on its products, which provides peace of mind for buyers. The brand is known for producing reliable aftermarket parts that meet or exceed OEM standards.

5. **Performance Potential**

Forged cranks can handle higher torque and RPM loads better than stock cranks, making them ideal for turbocharged, supercharged, or high-compression naturally aspirated engines. This part can support modifications without premature failure.

6. **Ease of Installation**

The crankshaft is designed to be a drop-in replacement, meaning it can be installed without extensive modifications to the engine block or other components. This simplifies the build process for DIYers and mechanics.

7. **Cost-Effective Upgrade**

Compared to OEM cranks or high-end aftermarket options (e.g., Eagle or JE), this crankshaft offers a balanced price-to-performance ratio. It provides noticeable benefits without the premium cost of top-tier brands.

---

### **Cons**

1. **Not a Direct OEM Replacement in All Cases**

While this crankshaft is designed for Ford 302/351C engines, it may not be a perfect drop-in for heavily modified or custom engines. Users with non-standard rod lengths, main cap configurations, or extreme modifications may need additional machining or balancing.

2. **Limited Customization**

Unlike some high-end cranks, this Summit Racing part does not offer custom balancing or specialized features (e.g., counterweights for specific applications). If you need a crank with unique balancing characteristics, you may need to source elsewhere.

3. **Potential for Misalignment**

If the engine block or main bearings are worn or improperly fitted, the crankshaft may not seat correctly. This could lead to premature wear or failure, emphasizing the need for proper installation and maintenance.

4. **Dependence on Supporting Components**

A high-quality crankshaft is only as good as the rest of the engine. If other components (e.g., rods, bearings, or the block) are worn or inadequate, the crankshaft s performance may be compromised. Investing in a full engine rebuild kit is often recommended.

5. **Installation Skill Required**

While the crankshaft is a drop-in part, proper installation including balancing, bearing selection, and torque specifications requires mechanical expertise. Improper installation can lead to catastrophic failure.

6. **No Return on Investment for Mild Applications**

If the engine is not heavily modified and operates under low stress, the benefits of a forged crankshaft may not be immediately noticeable. For mild street applications, a stock or lightly upgraded crank might suffice, making this part an overkill purchase.

7. **Limited Availability of Spare Parts**

Unlike OEM parts, Summit Racing cranks may not have as widespread availability for spare components (e.g., replacement rods or bearings). This could be a drawback if repairs are needed down the line.

---

### **Conclusion**

The Summit Racing 31-242-3 crankshaft is a solid, cost-effective upgrade for Ford 302 and 351 Cleveland engines, particularly for those planning performance modifications such as forced induction or high-compression tuning. Its forged construction, precision machining, and compatibility with stock and modified engines make it a reliable choice for enthusiasts seeking an improvement over stock parts.

However, it is not a universal solution users with heavily modified or custom engines may need additional work, and those running mild applications might not see significant benefits. Proper installation and supporting components are critical to maximizing its performance and longevity.

### **Recommendation**

- You are modifying a Ford 302 or 351C engine for performance (e.g., turbocharging, supercharging, or high compression).

- You want a durable, balanced upgrade that exceeds stock specifications without the cost of premium brands.

- You are prepared to invest in a full engine rebuild kit (rods, bearings, gaskets) to ensure compatibility and longevity.

- Your engine is not being modified, and you only need a stock replacement.

- You have a custom or heavily modified engine that requires non-standard crankshaft specifications.

- You lack the mechanical skill or tools to install it correctly, as improper installation can void warranties and cause failure.

For most enthusiasts looking to push their Ford engines beyond stock limits, the Summit Racing 31-242-3 crankshaft is a practical and worthwhile investment. Pair it with high-quality supporting components and proper installation for optimal results.

Details:

My dad has this Ford crankshaft never used that I found inside the garage it only fits 4.7 and 5.0 on older motors my.

part #: 312423 prices

• $79.99-$424.99

specifications cranshafengin:

• for makes: Ford
• brand: Summit Racing
• mpn: 31-242-3
• part type: Crankshaft
• manufacturer warranty: 1 Year
• material: Steel
• vintage part: No
• performance part: Yes

payments cranshafengin:

• other
• wallet: Google-pay
• credit card: Diners-club

offer cranshafengin:

• best offers: True
• started: March 28, 2026
• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 1

shipping cranshafengin:

• type: Calculated
• cost: $0.00
• class: Standard
• transit: 5-11 Days
• carrier: USPS
• service: USPS Ground Advantage

general cranshafengin:

• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
• condition: New

seller cranshafengin:

• # reviews: 0
• city: New Holland, Ohio
• rating: 50.0%

returns cranshafengin:

• policy: No Returns

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