4.040 Bore (+.040 ) Flat-Top (-6cc)
$1,579.00
Available
SBF 347 Rotating Assembly
4.030 Bore (+.030 ) Dish-Top (-14cc) [RA-SBF-347-KP492A3]4.040 Bore (+.040 ) Dish-Top (-10cc) [RA-SBF-347-KP491A4]
4.030 Bore (+.030 ) Flat-Top (-6cc) [RA-SBF-347-KP490A3]
4.030 Bore (+.030 ) Dish Top (-10cc) [RA-SBF-347-KP491A3]
Fully Balanced SBF Ford 347 Rotating Assembly with Wiseco Forged Pistons
Available in 4.030" (.030 over) and 4.040" (.040" over)
Scat Balanced Crankshaft w/ 5.4" Scat Rods
Balanced In-House on our CWT-5000's
This assembly comes with a Scat crankshaft and 4340 Scat rods, Hastings or Mahle moly rings, King bearings, and a heavy-duty 157 or 164 tooth flexplate, and a Pro-Race brand damper. See our other listings for various piston bores in flat, dish, and dome styles. Details on all the actual specs of this assembly are provided below. Information on various upgrades we offer in our other listings is included as well.
Specifications
Crankshaft
- Crankshaft: Genuine Scat, Balanced In-House
- Crankshaft Stroke: 3.400" for 347 Engine Builds
- Crankshaft Material: Cast Nodular
- Journal Diameter: Std. Mains
- Rear Main Seal: Ford Std.
Connecting Rod
- Rods: Genuine Scat
- Rod Type: Scat Pro-Stock, I-beam, Bronze Bushed
- Rod Length: 5.4"
- Rod Material: Forged 4340 Alloy
- Rod Bolt/Cap Screw: ARP 8740 Cap Screws
Piston & Rings
- Pistons: Wiseco Fully Forged, High Performance for Street/Strip Use
- Compression Height: 1.102"
- Piston Material: Forged 2618 Aircraft Alloy
- Piston Rings: Mahle or Hastings Moly, Reduced Tension Oil Ring
- Ring Size and Fit: 5/64 5/64 3/16 Drop-In
- Ring Material: Ductile Iron/Cast/Stainless/Moly
Bearing, Damper, and Flexplate
- Main Bearings: King
- Rod Bearings: King
- Balance: In-House on CWT Balancer
- Damper: Pro-Race Brand 6.4", 28 oz.
- Flexplate: Heavy Duty, 157 or 164 Tooth (Manual Trans. Flywheels Available at Additional Cost)
Compression Ratio Calculator
Pre-filled Compression Ratio Calculator
How we build our Rotating Assemblies
In Depth
Pistons
The assembly includes Wiseco fully forged pistons rated at 800+ HP. These pistons are 100% manufactured in the USA by one of the highest-rated piston builders in the country.
The pictures above are file photos of our Wiseco pistons.
Wiseco forged pistons are highly regarded in the street/strip performance industry. Our pistons are made using 2618 aircraft alloy and have fully machined crowns. Most lower-cost forged pistons on the market do not use this alloy, and they do not have fully machined crowns. We prefer the 2618 alloy over the lower-cost 4032 alloy, which may fragment due to detonation, causing significant damage to the engine.
The 4032 forged alloy pistons are suitable for stock or mild engine builds, but should never be used in carbureted engines built to high horsepower levels.
The forged 2618 alloy piston is much more resistant to the effects of detonation and heat. Our Wiseco forged pistons are custom-designed with an increased compression height, which has many advantages.
Since our pistons sit at a taller-than-normal compression height, you'll only have to remove approximately .005-.010 off the deck surface of a virgin block to achieve a zero deck (flush with the deck surface). This maintains the deck's thickness, making it much stronger than a block that has been cut down .025". The engine will also run cooler with a thicker deck, as the deck dissipates much of the built-up heat an engine generates. This also allows for future deck resurfacing without compromising the integrity of the block.
Scat Crankshaft
The Scat crankshaft supplied with this assembly is manufactured from an exclusive Space Age material designed for high strength and fatigue resistance. Scat cranks are 25% stronger than stock OEM cast cranks and are the best value you will ever find. The Scat crankshafts are ideal for building a strong bottom end for street rods, dirt and circle track racing, and drag strip racing. This crank is suitable for use up to approximately 500-525 HP.
We recommend checking the thrust clearance on the crank before assembling the engine. This is advisable on any crankshaft, regardless of brand or cost. Also, be sure to check your main and rod journal size.
Scat Connecting Rods
Our Scat rods feature genuine ARP 8740 Series 12-point cap screws, providing excellent block clearance in the lower end of the cylinders. The quality of Scat rods surpasses that of many low-cost no-name rods on the market, as well as some branded rods.
Scat rods are bronze bushed, which are far superior to press-fit. They are much more durable, free up a slight amount of horsepower, and reduce piston and oil temperature. Press-fit rods are not recommended, as machine shops often charge up to $60 to press them on. Bushed rods with full floating wrist pins, which we offer, are simple to attach to the pistons.
Flexplate
Heavy-duty flexplate included. This flexplate will resist cracking. A low-quality flexplate can often be identified by the lack of welding on each side where the plate mates to the ring gear, their pale grey color, and their susceptibility to rust.
Our flexplates are welded on both sides, much thicker than OE plates, and are either zinc dichromate or black powder coated. We would never use the thinner OE-style plate on an assembly like this. It is very important to let us know the tooth count required to accommodate your transmission.
Some bell housings will not allow the use of a 168 tooth flexplate and will require a 153 tooth size. We usually have both available at no extra cost.
WARNING: The crank has a dowel pin installed. You must align the flexplate or flywheel to the dowel pin, as the assembly was balanced with this pin installed.
Balancing
We do our own balancing with CWT 5500 Series balancers . The CWT 5500 is the ultimate for precision balancing, and we have three of these in our machine shop. Over the years we've used many different balancing machines and much prefer the CWT line over any others.
Every rotating assembly we sell within 2 grams or less at no extra charge. ,
A balance sheet is included with your assembly.
Summary
Some of these upgrades are often requested by those building an engine without a machine shop. These upgrades are very valuable for those wanting to take longevity and durability to the next level. They are all bottom-end related, which is an area worth investing a few more dollars into, especially if you're planning on running long and/or hard. These upgrades are also valuable for your build history on your engine and would certainly increase the resale value of your engine.
A Note from Skip White, Company President:
Many people have asked how we can sell this assembly for such a low price. The answer is that we buy our products at master WD (Warehouse Distributor) level for all the items in this assembly and sell directly to the public. We are a volume-based company, and our profit is based on sheer volume with a very low markup. This large volume purchasing allows us to buy products at a much lower price, and we pass these savings on to our customers. This is our main competitive edge.
Skip White
Upgrade Options
We offer several upgrade options with this assembly. Many not only improve performance but also enhance the reliability and longevity of your engine, along with resale value.
To add upgrades to your purchase, use the link at the bottom of the page in the "Recommend Products" or look under theΒ "UPGRADES" category.
SFI Damper
The SFI damper offers an extreme level of safety against breakage and is very resistant to the slippage of the elastomer damping material. Made from a higher grade of steel and constructed differently, these dampers usually last much longer than non-SFI dampers and have a much better appearance.
Many drag strips require this on engines producing high horsepower levels. The SFI certification is laser etched into the side. Damper failure rates are much higher on engines using non-SFI dampers, especially those with HP ratings exceeding 450 and turning 5600 RPM or higher.
We strongly recommend this upgrade for those running hard.
Cost of the SFI damper upgrade is $69.50 .
Crank Polishing
Crank polishing extends bearing life, reduces oil temperature, and frees up a slight amount of horsepower. This is a very low-cost upgrade, and in the world of mass production, most cranks do not come with a true polished finish. This is why most machine shops have a machine to do this.
The difference is dramatic between a crank right out of the box and one that we have polished. Bearing companies claim that cranks with better finishes on the journals will survive the break-in better and have much longer bearing life.
We perform a two-step process and bring the RA numbers down into the single-digit range.
Cost for the crank polishing upgrade is $38.50 .
Rod Proofing/Sizing
All rods, regardless of brand, should be checked for sizing on a Sunnen machine and corrected if needed. It is uncommon to find a complete set of rods with perfect sizing on both ends right out of the box.
Cost of this rod proofing/sizing upgrade is $45.00 .
Race Balancing
This upgrade is for those who want the engine to operate virtually vibration-free at high RPMs, which extends engine life and frees up a few more horsepower.
This somewhat labor-intensive procedure is not required, but the feel of an absolutely vibration-free engine at high RPMs is desirable for many.
With a race balance job, all pistons and rods are match-weighed to within 2/10's of a gram or less, and the final balance is brought down to around 1 gram plus or minus.
Cost of this race balancing upgrade is $125.00 .
Scat Competition Rods
The Scat Competition rods offer more security against rod breakage under hard use and feature ARP-8740 7/16" cap screws. With a 600+ HP rating, the slight cost to upgrade is well worth it in our opinion.
These rods require slightly less cam-to-rod clearance than the regular Scat rods. We use the very same Scat Competition rods in our 600+ HP 427 and 434 engines.
Cost of this Scat Competition rod upgrade is $65.00 .
ARP-2000 Rod Bolts
This upgrade is valuable as rod bolts are most likely to fail under hard use. When a rod bolt fails during high RPM, total engine destruction usually results.
The ARP-2000 rod bolts provide increased clamping force, keeping the big end of the rod stable and true to size. This upgrade is only available with the Competition rod upgrade.
Cost of this ARP-2000 rod bolt upgrade is $85.00 .
Scat 4340 Forged Crank
The forged Scat crank has a rating of 800+ HP, making it the ultimate upgrade for those wanting to run hard. Nitrous, blowers, turbos are not an issue with this crank. Even without such power adders, this crank offers great protection under the most severe conditions. This upgrade also comes with HP high-performance King bearings. If you decide to run power adders in the future, this upgrade is essential. The fatigue life of the 4340 crank over the cast nodular is greatly extended.
Cost of this forged crank upgrade is $460.00 .
Attention Valued Customers!
When it comes to highly technical questions, our sales team at Skip White Performance might not always have the detailed answers you're looking for, especially on topics like installation procedures or tuning.
For those with detailed or specific questions, we strongly recommend checking out automotive forums and communities where these products are frequently discussed. These forums are a treasure trove of information and can provide the expert advice you need. Additionally, YouTube has countless tutorials and guides that walk you through the installation process and other technical details.
Please note: While we're here to provide top-notch products, we cannot be held responsible for any damage resulting from the use or installation of this product. Make sure to do your research and proceed with caution!
Thank you for choosing Skip White Performance!
Disclaimer
Skip White Performance is not liable for any collateral damage or incidental issues arising from the use or misuse of our products. High-performance parts are intended for experienced professionals and enthusiasts. Use at your own risk.Product Information
UPC | RA-SBF-347-KP490A4 |
---|---|
Product Type | Rotating Assembly |
Price (excl. tax) | $1,579.00 |
Price (incl. tax) | $1,579.00 |
Tax | $0.00 |
Availability | Available |
Stroke Length | 5.4 |
Crankshaft Material | Cast Nodular |
Piston Type | Wiseco Fully Forged |
Piston Material | Forged 2618 Aircraft Alloy |
Piston Rings | Mahle or Hasting moly, Reduced Tension Oil Ring |
Piston Rings Size and Fit | 5/64 5/64 3/16 Drop-In |
Piston Rings Material | Ductile Iron/Cast/Stainless/Moly |
Crankshaft Type | Scat |
Balanced | Yes |
Crankshaft Journal Diameter | 2.249 |
Crankshaft Rear Main Seal | Ford Std. |
Connecting Rods Type | Scat Pro-Stock, I-beam, Bronze Bushed |
Connecting Rods Brand | Scat |
Connecting Rods Material | Forged 4340 Alloy |
Connecting Rods Hardware | ARP 8740 Cap Screws |
Main Bearings Brand | King |
Rod Bearings Brand | King |
Harmonic Damper | Pro-Race brand SFI 6.4", 28 oz. |
Piston Bore | 4.04 |
Shipping Cost | 158.5 |
Piston Net Head Volume CC | -6.0 |
Number of reviews | 0 |
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