Have you ever felt the rumble of a truly powerful engine? That feeling of pure, unadulterated performance? If you’re chasing that thrill, especially with a classic Ford small-block, you’ve probably heard the magic words: 347 Stroker Kit. But let’s be honest, diving into the world of stroker kits can feel like navigating a maze. Which components fit? What horsepower gains are realistic? Choosing the wrong parts can lead to headaches and wasted money.
That’s where we step in. Understanding the nuances of a 347 stroker build—from crankshaft selection to piston ring gap—is the key to unlocking serious torque and horsepower without sacrificing reliability. This guide cuts through the confusion. We break down exactly what a 347 stroker kit entails and why it’s the go-to upgrade for breathing new life into your engine.
By the end of this article, you will know exactly what to look for, what pitfalls to avoid, and how to select the perfect 347 Stroker Kit for your goals. Ready to transform your street machine or weekend racer? Let’s dive into the details of making big power.
Top 347 Stroker Kit Recommendations
- Innovative three-layer structure engineered to protect the interior of your vehicle with style, safety, and comfort in your daily ride
- Product type: auto part
- Package quantity: 1
- Made in united states
- Package dimensions: 24.1" (l) x 10.7" (w) x 8.6" (h)
- Designed specifically for small-block engines including 260, 289, 302, 351W, 5.0L, 331, and 347 cubic inch displacements
- Includes all necessary components for mechanical fuel pump installation: eccentric, washer, and retaining hardware in one complete set
- machined to OEM specifications for proper camshaft timing gear alignment and consistent fuel pump actuation
- Compatible with both stock and stroker small-block builds using mechanical fuel pumps
- Engineered for with heat-treated steel construction to withstand RPM and long-term engine
- Compatible with Yamaha. Please verify your OEM part number from your original unit to help ensure fitment.
- Replaces: Oem Part Numbers: / Yamaha Oem: 64H-W0001-00-00 / 64Hw00010000 / Yamaha Oem: 64F-W0001-01-00 / 64Fw00010100 / Yamaha Oem: 6K7-W0001-04-00 / 6K7w00010400 / / Specifications: / Type: Powerhead Rebuild Kit / Bore Size: 3.544" Standard / Configuration: V6 90° / Engine Type: 2-Stroke Carbureted — Horizontal Reeds / Kit Contents: 6 Pistons (Rings, Wrist Pins, Clips), Complete Powerhead Gasket Set (Head Gaskets, Base Gasket, Exhaust Gaskets, Carb Gaskets,
- Applications: Yamaha V6 90° 2-Stroke Horizontal Reeds 200Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 200Hp Horizontal Reeds (1991-1999) / / Yamaha V6 90° 2-Stroke Horizontal Reeds 175Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 175Hp Horizontal Reeds (1994-1999) / / Yamaha V6 90° 2-Stroke Horizontal Reeds 150Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 150Hp Horizontal Reeds (1994-1999) / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 150Hp
- Applications: 2-Stroke 150Hp Horizontal Reeds (2004-2008) / / Yamaha V6 90° 2-Stroke Horizontal Reeds 225Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 225Hp Horizontal Reeds (Select Years 1987-2008) / / Engine Notes: / V6 90° 2-Stroke Carbureted With Horizontal Reeds / Bore: 3.544" Standard | Displacement: Approx. 2596Cc / Key Distinction: Horizontal Reed Engines Only — Not Compatible With Vertical Reed Engines (Use 500-345 For Those) / ...
- Powerhead Gasket Kit Source: Aftermarket
- Compatible with Yamaha. Please verify your OEM part number from your original unit to help ensure fitment.
- Replaces: Oem Part Numbers: / Yamaha Oem: 64H-W0001-00-00 / 64Hw00010000 / Yamaha Oem: 64F-W0001-01-00 / 64Fw00010100 / Yamaha Oem: 6K7-W0001-04-00 / 6K7w00010400 / / Specifications: / Type: Powerhead Rebuild Kit / Bore Size: 3.544" Standard / Configuration: V6 90° / Engine Type: 2-Stroke Carbureted — Horizontal Reeds / Kit Contents: 6 Pistons (Rings, Wrist Pins, Clips), Complete Powerhead Gasket Set (Head Gaskets, Base Gasket, Exhaust Gaskets, Carb Gaskets,
- Applications: Yamaha V6 90° 2-Stroke Horizontal Reeds 200Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 200Hp Horizontal Reeds (1991-1999) / / Yamaha V6 90° 2-Stroke Horizontal Reeds 175Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 175Hp Horizontal Reeds (1994-1999) / / Yamaha V6 90° 2-Stroke Horizontal Reeds 150Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 150Hp Horizontal Reeds (1994-1999) / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 150Hp
- Applications: 2-Stroke 150Hp Horizontal Reeds (2004-2008) / / Yamaha V6 90° 2-Stroke Horizontal Reeds 225Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 225Hp Horizontal Reeds (Select Years 1987-2008) / / Engine Notes: / V6 90° 2-Stroke Carbureted With Horizontal Reeds / Bore: 3.544" Standard | Displacement: Approx. 2596Cc / Key Distinction: Horizontal Reed Engines Only — Not Compatible With Vertical Reed Engines (Use 500-345 For Those) / ...
- Powerhead Gasket Kit Source: Aftermarket
- Compatible with Yamaha. Please verify your OEM part number from your original unit to help ensure fitment.
- Replaces: Oem Part Numbers: / Yamaha Oem: 64H-W0001-00-00 / 64Hw00010000 / Yamaha Oem: 64F-W0001-01-00 / 64Fw00010100 / Yamaha Oem: 6K7-W0001-04-00 / 6K7w00010400 / / Specifications: / Type: Powerhead Rebuild Kit / Bore Size: 3.544" Standard / Configuration: V6 90° / Engine Type: 2-Stroke Carbureted — Horizontal Reeds / Kit Contents: 6 Pistons (Rings, Wrist Pins, Clips), Complete Powerhead Gasket Set (Head Gaskets, Base Gasket, Exhaust Gaskets, Carb Gaskets,
- Applications: Yamaha V6 90° 2-Stroke Horizontal Reeds 200Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 200Hp Horizontal Reeds (1991-1999) / / Yamaha V6 90° 2-Stroke Horizontal Reeds 175Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 175Hp Horizontal Reeds (1994-1999) / / Yamaha V6 90° 2-Stroke Horizontal Reeds 150Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 150Hp Horizontal Reeds (1994-1999) / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 150Hp
- Applications: 2-Stroke 150Hp Horizontal Reeds (2004-2008) / / Yamaha V6 90° 2-Stroke Horizontal Reeds 225Hp — 3.544" Bore: / Yamaha 6 Cyl 3.544" Bore 90° 2-Stroke 225Hp Horizontal Reeds (Select Years 1987-2008) / / Engine Notes: / V6 90° 2-Stroke Carbureted With Horizontal Reeds / Bore: 3.544" Standard | Displacement: Approx. 2596Cc / Key Distinction: Horizontal Reed Engines Only — Not Compatible With Vertical Reed Engines (Use 500-345 For Those) / ...
- Powerhead Gasket Kit Source: Aftermarket
- Compatible with Kawasaki. Please verify your OEM part number from your original unit to help ensure fitment.
- Replaces: / Reference Part Numbers: / Kawasaki 11060-3758 / 15-002 / Keihin Cdkcv / Specifications: / Type: Carburetor Rebuild Kit / Series: Keihin Cdkcv / Engine: Kawasaki 900/1100/1200Cc / Contents: Gaskets, Diaphragms, O-Rings, Needle And Seat, Check Valve / Applications: / 1999-2006 Stx 900, 2000-2003 Zxi 1100, 2002-2005 Stx-R 1200, 1999-2005 Ultra 150 / Kawasaki 900 1100 1200
- Applications: Applications: / Keihin Cdkcv Carburetor Rebuild Kit Fitment: / 1999-2006 Kawasaki Stx 900 (Jt900) / 2000-2003 Kawasaki Zxi 1100 (Jh1100) / 2002-2005 Kawasaki Stx-R 1200 (Jt1200) / 1999-2005 Kawasaki Ultra 150 (Jh1200) / This Rebuild Kit Fits Kawasaki Jet Ski Models Equipped With The Keihin Cdkcv Series Carburetor. The Cdkcv Replaced The Earlier Cdk-Ii On These Late-Model Kawasaki 2-Stroke Engines.
- Applications: Late-Model Kawasaki 2-Stroke Engines. One Kit Is Required Per Carburetor. Please Verify Your Carburetor Type Before Purchasing....
- Carburetor Rebuild Kit Source: Aftermarket
- Package Dimensions: 30.0" (L) x 20.5" (W) x 12.0" (H)
- Package Quantity: 1
- Country of Origin: China
- Product type: AUTOPART
The Ultimate Buying Guide for Your 347 Stroker Kit
Thinking about giving your engine more power? A 347 stroker kit is a popular way to do it. This kit lets you build a bigger engine from a smaller one, usually a Ford 302. This guide helps you pick the right one.
Key Features to Look For
When shopping for a 347 stroker kit, you need to check a few important parts. These parts work together to make your engine stronger.
1. Crankshaft Material and Stroke
- Stroke Length: This is what makes it a “stroker.” A 347 kit usually uses a 3.4-inch stroke crank, up from the stock 3.0 inches. Longer stroke means more air and fuel get sucked in.
- Forged vs. Cast: Always look for a forged crankshaft. Forged steel is much stronger than cast iron. It handles high horsepower and racing better.
2. Connecting Rods
- I-Beam vs. H-Beam: I-beam rods are common and good for street driving. If you plan on high RPMs or serious racing, choose stronger H-beam rods.
- Bolt Size: Check the rod bolts. Stronger bolts, like ARP capscrews, hold the rod together better under stress.
3. Pistons
- Compression Ratio: Pistons determine your engine’s compression ratio (how tightly the air/fuel mix is squeezed). Higher compression (like 10.5:1 or 11:1) makes more power but needs premium fuel. Lower ratios are safer for regular pump gas.
- Piston Material: Pistons should be made of high-quality aluminum alloy. Look for features like valve reliefs if you plan on using high-lift camshafts.
Important Materials Matter
The materials used in the kit directly affect how long your engine lasts and how much power it makes safely.
- Crankshaft: As mentioned, 4340 Forged Steel is the gold standard. It resists bending and cracking under huge loads.
- Rods and Pistons: High-strength 4130 or 4340 alloy steel is best for rods. Pistons use durable hypereutectic or forged aluminum.
- Bearings: High-quality engine bearings (like those from Clevite or King) reduce friction and wear. Cheap bearings fail early.
Factors That Improve or Reduce Quality
Not all kits are built the same. Some small details make a big difference in performance and reliability.
Quality Boosters
- Balanced Rotating Assembly: A good kit comes internally balanced. This means the crank, rods, and pistons are weighed and matched perfectly. This reduces engine vibration and lets the engine spin faster safely.
- Quality Ring Pack: Modern, thinner piston rings seal better. This improves power and reduces oil burning.
Quality Reducers
- Unbalanced Parts: If the kit is not balanced, you will feel harsh vibrations, which damages seals and bearings over time.
- Cheap Coatings: Some budget pistons use thin coatings that wear off quickly. Look for proven coating technologies that reduce friction.
User Experience and Use Cases
Who is this kit for? Your goal decides which kit you should buy.
Street Cruiser (Daily Driver)
If you drive the car every day, you need reliability. Choose a kit with a lower compression ratio (9.5:1 or 10:1) that runs well on 91 octane gas. Focus on a good, balanced assembly for smooth idling.
Weekend Warrior / Drag Racing
Here, you chase maximum power. You can run higher compression ratios (11:1 or more) and usually use race fuel or ethanol blends. You must have forged rods and pistons because the engine sees high RPMs often.
Budget Builds
Budget kits often use cast cranks or less expensive rod designs. These are fine for engines making under 450 horsepower. If you push them past that, you risk failure.
10 Frequently Asked Questions (FAQ) About 347 Stroker Kits
Q: What engine does a 347 stroker kit fit?
A: These kits are designed to upgrade the popular Ford 302 cubic inch small block V8 engine.
Q: Do I need to balance the rotating assembly?
A: Yes, absolutely. A quality kit should be pre-balanced, or you must have it professionally balanced after assembly. This prevents bad vibrations.
Q: Will my stock oil pump work with a stroker kit?
A: Most kits work with a stock oil pump, but performance builds often benefit from a high-volume oil pump to keep the new, larger engine lubricated.
Q: What compression ratio is best for street driving?
A: For reliability on regular gas, aim for a compression ratio between 9.5:1 and 10.0:1.
Q: Does a stroker kit require special pistons?
A: Yes. The pistons are different from stock because they must account for the longer stroke of the crankshaft and the different connecting rod length.
Q: What is the main benefit of stroking an engine?
A: The main benefit is increased torque, especially at lower RPMs, because the engine moves more air and fuel with each rotation.
Q: Can I use my old stock cylinder heads?
A: You can, but to get the most power, you should match the heads to the new airflow potential of the 347. Stock heads often become the weak link.
Q: How much horsepower can I expect to gain?
A: Gains vary widely based on supporting parts (cam, heads, intake), but a good 347 build often sees a 40 to 70 horsepower increase over a healthy stock 302.
Q: Do I need new main and rod bearings with a new kit?
A: Yes. Always install new, high-quality bearings when assembling any new rotating assembly. Do not reuse old ones.
Q: What is the difference between a 347 and a 331 stroker?
A: Both use the same block, but a 331 uses a shorter 3.25-inch stroke crank, while the 347 uses a longer 3.4-inch stroke crank, giving the 347 slightly more displacement and torque potential.